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Thread: Realtek RTL8723BE wifi card -no networks found!

  1. #1
    Join Date
    May 2015
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    Realtek RTL8723BE wifi card -no networks found!

    Hello all, I'm Lee -'intermediate-Linux-user' with a problem.

    Bought a new HP Probook 455 G2 with "OEM Ubuntu 14.04 LTS" -arrived with 12.04 LTS. Little embarrassing for eBuyer, but not a problem for me as I was going wipe and clean install -I like my partitions just so....

    /Boot > 200MB > Ext2 > Primary
    / > 10GB > Ext4 > Primary
    /usr > 40GB > Ext4 > Primary
    Swap > 2GB > Linux-Swap > Logical
    /home> to 1TB end > Ext 4 > Logical

    On clean install of 14.04 LTS I had ethernet plugged in for updates etc during install which worked fine. On reboot I removed the ethernet and found that the wireless 'worked' (i.e. the card was detected fine), but no networks were found; my phone and desktop are fine with the wireless network so it's an idiosyncrasy of the laptop....

    Some useful information, I've tried to be thorough as for as my knowledge goes:
    Code:
    lee@xxxxxxxx:~$ lspci | grep -i wireless
    02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
    Code:
    lee@xxxxxxx:~$ nm-tool
    
    NetworkManager Tool
    
    State: connected (global)
    
    - Device: wlan0 ----------------------------------------------------------------
      Type:              802.11 WiFi
      Driver:            rtl8723be
      State:             disconnected
      Default:           no
      HW Address:        C4:8E:8F:AE:A5:DB
    
      Capabilities:
    
      Wireless Properties
        WEP Encryption:  yes
        WPA Encryption:  yes
        WPA2 Encryption: yes
    
      Wireless Access Points 
    
    
    - Device: eth0  [Wired connection 1] -------------------------------------------
      Type:              Wired
      Driver:            r8169
      State:             connected
      Default:           yes
      HW Address:        3C:A8:2A:DE:75:A0
    
      Capabilities:
        Carrier Detect:  yes
        Speed:           100 Mb/s
    
      Wired Properties
        Carrier:         on
    
      IPv4 Settings:
        Address:         192.168.1.132
        Prefix:          24 (255.255.255.0)
        Gateway:         192.168.1.253
    
        DNS:             192.168.1.253
    Code:
    lee@xxxxxxx:~$ nmcli nm
    RUNNING         STATE           WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
    running         connected       enabled         enabled    enabled         disabled
    Code:
    lee@xxxxxxx:~$ sudo rfkill list
    [sudo] password for lee: 
    0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
    1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
    Code:
    lee@xxxxxxx:~$ iwconfig
    eth0      no wireless extensions.
    
    wlan0     IEEE 802.11bgn  ESSID:off/any  
              Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
              Retry short limit:7   RTS thr=2347 B   Fragment thr:off
              Power Management:off
              
    lo        no wireless extensions.
    Code:
    lee@xxxxxxx:~$ sudo iwlist wlan0 scan
    wlan0     Interface doesn't support scanning : Device or resource busy
    Any ideas why I have a device that's correctly installed, but won't scan for or find networks?

    Cheers!
    Lee
    --Confused Chap From UK--

    **UPDATE**
    I've just found the Wireless Troubleshooting page with the diagnostic code, output follows:
    Code:
    lee@xxxxxxx:~$ sudo apt-get update; sudo apt-get install usbutils pciutils hwinfo grep rfkill; sudo lshw -C network; rfkill list; sudo iwlist scan | grep -Ei 'chan|ssid'; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nnk | grep -iA2 net; lsusb; nmcli nm status; sudo lshw -short; uname -a; sudo updatedb; dmesg | grep -E  '02:00|80211|acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|ireless|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|ound|p54|prism|rror|rtl|RTL|rt2|RT2|rt3|RT3|rt5|RT5|rt6|RT6|rt7|RT7|usb|witch|wl';sudo dmidecode|grep -E 'anufact|roduct|erial|elease'; iwconfig; grep -E '80211|acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|wmi|witch|wl' /etc/modprobe.d/*; cat /var/lib/NetworkManager/NetworkManager.state; sudo hwinfo --netcard ; ps -aux|grep -E 'wpa|icd|etwork'; netstat -rn ; cat /etc/resolv.conf; ls -lia /boot; grep tmpfs /etc/fstab; ubuntu-support-status; sudo update-pciids; sudo update-usbids; sudo lsmod
    
    [sudo] password for lee: 
    
      *-network               
           description: Ethernet interface
           product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:01:00.0
           logical name: eth0
           version: 10
           serial: 3c:a8:2a:de:75:a0
           size: 100Mbit/s
           capacity: 1Gbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-3_0.0.1 04/23/13 ip=192.168.1.132 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
           resources: irq:90 ioport:4000(size=256) memory:d5804000-d5804fff memory:d5800000-d5803fff
      *-network
           description: Wireless interface
           product: RTL8723BE PCIe Wireless Network Adapter
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:02:00.0
           logical name: wlan0
           version: 00
           serial: c4:8e:8f:ae:a5:db
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
           configuration: broadcast=yes driver=rtl8723be driverversion=3.16.0-38-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
           resources: irq:36 ioport:3000(size=256) memory:d4800000-d4803fff
    0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
    1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
    eth0      Interface doesn't support scanning.
    
    lo        Interface doesn't support scanning.
    
    # interfaces(5) file used by ifup(8) and ifdown(8)
    auto lo
    iface lo inet loopback
    DISTRIB_ID=Ubuntu
    DISTRIB_RELEASE=14.04
    DISTRIB_CODENAME=trusty
    DISTRIB_DESCRIPTION="Ubuntu 14.04.2 LTS"
    01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
        Subsystem: Hewlett-Packard Company Device [103c:2235]
        Kernel driver in use: r8169
    02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
        Subsystem: Hewlett-Packard Company Device [103c:2231]
        Kernel driver in use: rtl8723be
    Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 001 Device 003: ID 04ca:704d Lite-On Technology Corp. 
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 003 Device 002: ID 0bda:b001 Realtek Semiconductor Corp. 
    Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
    Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
    Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    RUNNING         STATE           WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
    running         connected       enabled         enabled    enabled         disabled  
    H/W path        Device      Class       Description
    ===================================================
                                system      HP ProBook 455 G2 (L8B56ES#ABU)
    /0                          bus         2235
    /0/5                        memory      64KiB BIOS
    /0/17                       processor   AMD A10-7300 Radeon R6, 10 Compu
    /0/17/18                    memory      256KiB L1 cache
    /0/17/19                    memory      4MiB L2 cache
    /0/0                        memory      8GiB System Memory
    /0/0/0                      memory      SODIMMProject-Id-Version: lshwRe
    /0/0/1                      memory      8GiB SODIMM DDR3 Synchronous 160
    /0/100                      bridge      Advanced Micro Devices, Inc. [AM
    /0/100/0.2                  generic     Advanced Micro Devices, Inc. [AM
    /0/100/1                    display     Kaveri
    /0/100/1.1                  multimedia  Advanced Micro Devices, Inc. [AM
    /0/100/3.1                  bridge      Advanced Micro Devices, Inc. [AM
    /0/100/3.1/0    eth0        network     RTL8111/8168/8411 PCI Express Gi
    /0/100/3.2                  bridge      Advanced Micro Devices, Inc. [AM
    /0/100/3.2/0    wlan0       network     RTL8723BE PCIe Wireless Network 
    /0/100/3.4                  bridge      Advanced Micro Devices, Inc. [AM
    /0/100/3.4/0                generic     RTS5229 PCI Express Card Reader
    /0/100/10                   bus         FCH USB XHCI Controller
    /0/100/11                   storage     FCH SATA Controller [AHCI mode]
    /0/100/12                   bus         FCH USB OHCI Controller
    /0/100/12.2                 bus         FCH USB EHCI Controller
    /0/100/13                   bus         FCH USB OHCI Controller
    /0/100/13.2                 bus         FCH USB EHCI Controller
    /0/100/14                   bus         FCH SMBus Controller
    /0/100/14.2                 multimedia  FCH Azalia Controller
    /0/100/14.3                 bridge      FCH LPC Bridge
    /0/100/14.4                 bridge      FCH PCI Bridge
    /0/100/14.5                 bus         FCH USB OHCI Controller
    /0/101                      bridge      Advanced Micro Devices, Inc. [AM
    /0/102                      bridge      Advanced Micro Devices, Inc. [AM
    /0/103                      bridge      Advanced Micro Devices, Inc. [AM
    /0/104                      bridge      Advanced Micro Devices, Inc. [AM
    /0/105                      bridge      Advanced Micro Devices, Inc. [AM
    /0/106                      bridge      Advanced Micro Devices, Inc. [AM
    /0/107                      bridge      Advanced Micro Devices, Inc. [AM
    /0/108                      bridge      Advanced Micro Devices, Inc. [AM
    /0/109                      bridge      Advanced Micro Devices, Inc. [AM
    /0/1            scsi0       storage     
    /0/1/0.0.0      /dev/sda    disk        1TB HGST HTS541010A9
    /0/1/0.0.0/1    /dev/sda1   volume      200MiB Linux filesystem partitio
    /0/1/0.0.0/2    /dev/sda2   volume      10000MiB EXT4 volume
    /0/1/0.0.0/3    /dev/sda3   volume      48GiB EXT4 volume
    /0/1/0.0.0/4    /dev/sda4   volume      872GiB Extended partition
    /0/1/0.0.0/4/5  /dev/sda5   volume      2000MiB Linux swap / Solaris par
    /0/1/0.0.0/4/6  /dev/sda6   volume      870GiB Linux filesystem partitio
    /0/2            scsi1       storage     
    /0/2/0.0.0      /dev/cdrom  disk        DVDRW  SU208GB
    /1                          power       VI04040XL
    Linux ubuntubox 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
    [    0.000000] DMI: Hewlett-Packard HP ProBook 455 G2/2235, BIOS M75 Ver. 01.09 12/04/2014
    [    0.000000] AGP: No AGP bridge found
    [    0.000000] No NUMA configuration found
    [    0.000000] AGP: No AGP bridge found
    [    3.166564] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    [    3.182185] pci 0000:02:00.0: [10ec:b723] type 00 class 0x028000
    [    3.182210] pci 0000:02:00.0: reg 0x10: [io  0x3000-0x30ff]
    [    3.182240] pci 0000:02:00.0: reg 0x18: [mem 0xd4800000-0xd4803fff 64bit]
    [    3.182354] pci 0000:02:00.0: supports D1 D2
    [    3.182355] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold
    [    3.201751] usbcore: registered new interface driver usbfs
    [    3.201766] usbcore: registered new interface driver hub
    [    3.201916] usbcore: registered new device driver usb
    [    3.214232] Switched to clocksource hpet
    [    3.225391] pnp: PnP ACPI: found 7 devices
    [    3.712092] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
    [    3.735661] pci 0000:02:00.0: Signaling PME through PCIe PME interrupt
    [    3.736725] Console: switching to colour frame buffer device 170x48
    [    3.737629] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input1
    [    3.737657] ACPI: Lid Switch [LID]
    [    4.167530] ehci-pci 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround
    [    4.178643] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
    [    4.178645] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.178648] usb usb1: Product: EHCI Host Controller
    [    4.178649] usb usb1: Manufacturer: Linux 3.16.0-38-generic ehci_hcd
    [    4.178651] usb usb1: SerialNumber: 0000:00:12.2
    [    4.179045] hub 1-0:1.0: USB hub found
    [    4.179829] ehci-pci 0000:00:13.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaround
    [    4.190635] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
    [    4.190638] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.190640] usb usb2: Product: EHCI Host Controller
    [    4.190641] usb usb2: Manufacturer: Linux 3.16.0-38-generic ehci_hcd
    [    4.190643] usb usb2: SerialNumber: 0000:00:13.2
    [    4.191008] hub 2-0:1.0: USB hub found
    [    4.250639] usb usb3: New USB device found, idVendor=1d6b, idProduct=0001
    [    4.250644] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.250646] usb usb3: Product: OHCI PCI host controller
    [    4.250648] usb usb3: Manufacturer: Linux 3.16.0-38-generic ohci_hcd
    [    4.250650] usb usb3: SerialNumber: 0000:00:12.0
    [    4.251063] hub 3-0:1.0: USB hub found
    [    4.310620] usb usb4: New USB device found, idVendor=1d6b, idProduct=0001
    [    4.310625] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.310627] usb usb4: Product: OHCI PCI host controller
    [    4.310629] usb usb4: Manufacturer: Linux 3.16.0-38-generic ohci_hcd
    [    4.310630] usb usb4: SerialNumber: 0000:00:13.0
    [    4.311172] hub 4-0:1.0: USB hub found
    [    4.370620] usb usb5: New USB device found, idVendor=1d6b, idProduct=0001
    [    4.370625] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.370627] usb usb5: Product: OHCI PCI host controller
    [    4.370629] usb usb5: Manufacturer: Linux 3.16.0-38-generic ohci_hcd
    [    4.370631] usb usb5: SerialNumber: 0000:00:14.5
    [    4.371042] hub 5-0:1.0: USB hub found
    [    4.372184] usb usb6: New USB device found, idVendor=1d6b, idProduct=0002
    [    4.372186] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.372188] usb usb6: Product: xHCI Host Controller
    [    4.372190] usb usb6: Manufacturer: Linux 3.16.0-38-generic xhci_hcd
    [    4.372191] usb usb6: SerialNumber: 0000:00:10.0
    [    4.372576] hub 6-0:1.0: USB hub found
    [    4.375410] usb usb7: New USB device found, idVendor=1d6b, idProduct=0003
    [    4.375412] usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    [    4.375414] usb usb7: Product: xHCI Host Controller
    [    4.375415] usb usb7: Manufacturer: Linux 3.16.0-38-generic xhci_hcd
    [    4.375417] usb usb7: SerialNumber: 0000:00:10.0
    [    4.375750] hub 7-0:1.0: USB hub found
    [    4.382446] Loaded X.509 cert 'Magrathea: Glacier signing key: c284edaccf0b473652c34d23bec356944236e63b'
    [    4.434782] tpm_tis 00:06: A TPM error (7) occurred attempting to read a pcr value
    [    4.434789] ima: No TPM chip found, activating TPM-bypass!
    [    4.436371] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
    [    4.499047] r8169 0000:01:00.0 eth0: RTL8168g/8111g at 0xffffc9000001e000, 3c:a8:2a:de:75:a0, XID 10900800 IRQ 90
    [    4.499050] r8169 0000:01:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko]
    [    4.750633] usb 1-5: new high-speed USB device number 3 using ehci-pci
    [    4.947346] usb 1-5: New USB device found, idVendor=04ca, idProduct=704d
    [    4.947351] usb 1-5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
    [    4.947353] usb 1-5: Product: HP HD Webcam
    [    4.947355] usb 1-5: Manufacturer: DEFSU019I7Z5PT
    [    4.947357] usb 1-5: SerialNumber: 200901010001
    [    5.218644] usb 3-3: new full-speed USB device number 2 using ohci-pci
    [    5.380734] usb 3-3: No LPM exit latency info found, disabling LPM.
    [    5.402736] usb 3-3: New USB device found, idVendor=0bda, idProduct=b001
    [    5.402741] usb 3-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    [    5.402744] usb 3-3: Product: Bluetooth Radio 
    [    5.402746] usb 3-3: Manufacturer: Realtek 
    [    5.402748] usb 3-3: SerialNumber: 00e04c000001
    [    5.728145] Switched to clocksource tsc
    [    8.402012] input: HP Wireless hotkeys as /devices/virtual/input/input12
    [    8.416077] lp: driver loaded but no devices found
    [    8.470138] cfg80211: Calling CRDA to update world regulatory domain
    [    8.524564] fb: switching to radeondrmfb from VESA VGA
    [    8.524600] Console: switching to colour dummy device 80x25
    [    8.533316] rtl8723be: Using firmware rtlwifi/rtl8723befw.bin
    [    8.554490] usbcore: registered new interface driver btusb
    [    8.572440] uvcvideo: Found UVC 1.00 device HP HD Webcam (04ca:704d)
    [    8.579099] input: HP HD Webcam as /devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5:1.0/input/input14
    [    8.579602] usbcore: registered new interface driver uvcvideo
    [    8.622229] lis3lv02d: 8 bits 3DC sensor found
    [    8.700849] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
    [    8.701223] rtlwifi: wireless switch is on
    [    8.797829] cfg80211: World regulatory domain updated:
    [    8.797835] cfg80211:  DFS Master region: unset
    [    8.797839] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
    [    8.797844] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
    [    8.797849] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
    [    8.797853] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
    [    8.797856] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
    [    8.797859] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
    [    8.854195] [drm] Found VCE firmware/feedback version 40.2.2 / 15!
    [    9.204416] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro
    [   11.055647] Console: switching to colour frame buffer device 170x48
    [   11.085757] input: HD-Audio Generic HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.1/sound/card0/input17
    [   11.106591] sound hdaudioC1D0: autoconfig: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
    [   11.106600] sound hdaudioC1D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
    [   11.106604] sound hdaudioC1D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
    [   11.106608] sound hdaudioC1D0:    mono: mono_out=0x0
    [   11.106611] sound hdaudioC1D0:    inputs:
    [   11.106615] sound hdaudioC1D0:      Mic=0x19
    [   11.106618] sound hdaudioC1D0:      Internal Mic=0x12
    [   11.119821] input: HD-Audio Generic Mic as /devices/pci0000:00/0000:00:14.2/sound/card1/input18
    [   11.120010] input: HD-Audio Generic Headphone as /devices/pci0000:00/0000:00:14.2/sound/card1/input19
    [   17.349902] r8169 0000:01:00.0 eth0: link down
    [   17.349943] r8169 0000:01:00.0 eth0: link down
    [   17.350020] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
    [   17.828779] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
    [   18.724546] vboxdrv: Found 4 processor cores.
    [   18.943962] vboxpci: IOMMU found
    [   19.043485] r8169 0000:01:00.0 eth0: link up
    [   19.043503] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
    [   32.280655] audit: type=1400 audit(1433028271.335:68): apparmor="DENIED" operation="open" profile="/usr/lib/telepathy/mission-control-5" name="/etc/dconf/profile/gdm" pid=1609 comm="mission-control" requested_mask="r" denied_mask="r" fsuid=116 ouid=0
    [36274.003084] r8169 0000:01:00.0 eth0: link down
    [36298.359838] r8169 0000:01:00.0 eth0: link up
        Release Date: 12/04/2014
            Serial services are supported (int 14h)
        Manufacturer: Hewlett-Packard
        Product Name: HP ProBook 455 G2
        Serial Number: CND513922Z
        Manufacturer: Hewlett-Packard
        Product Name: 2235
        Serial Number: PELTDI51V8JXBG
        Manufacturer: Hewlett-Packard
        Serial Number: CND513922Z
        Manufacturer: AMD Corporation
        Serial Number: NotSupport
        Manufacturer: Not Specified
        Serial Number: Not Specified
        Manufacturer: Micron
        Serial Number: 0EADA982
        Manufacturer: 33-22
        SBDS Serial Number: 78B7
        SBDS Manufacture Date: 2015-01-15
    eth0      no wireless extensions.
    
    wlan0     IEEE 802.11bgn  ESSID:off/any  
              Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
              Retry short limit:7   RTS thr=2347 B   Fragment thr:off
              Power Management:off
              
    lo        no wireless extensions.
    
    /etc/modprobe.d/alsa-base.conf:install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }
    /etc/modprobe.d/blacklist-ath_pci.conf:# which ath5k cannot recover. To prevent this condition, stop
    /etc/modprobe.d/blacklist-ath_pci.conf:blacklist ath_pci
    /etc/modprobe.d/blacklist.conf:blacklist eth1394
    /etc/modprobe.d/blacklist.conf:# replaced by p54pci
    /etc/modprobe.d/blacklist.conf:blacklist prism54
    /etc/modprobe.d/blacklist.conf:# replaced by b43 and ssb.
    /etc/modprobe.d/blacklist.conf:blacklist bcm43xx
    /etc/modprobe.d/blacklist-oss.conf:blacklist uart6850
    /etc/modprobe.d/blacklist-watchdog.conf:blacklist twl4030_wdt
    /etc/modprobe.d/iwlwifi.conf:# /etc/modprobe.d/iwlwifi.conf
    /etc/modprobe.d/iwlwifi.conf:# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
    /etc/modprobe.d/iwlwifi.conf:# microcode file installed on the system.  When removing iwlwifi, first
    /etc/modprobe.d/iwlwifi.conf:# remove the iwl?vm module and then iwlwifi.
    /etc/modprobe.d/iwlwifi.conf:remove iwlwifi \
    /etc/modprobe.d/iwlwifi.conf:(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
    /etc/modprobe.d/iwlwifi.conf:&& /sbin/modprobe -r mac80211
    [main]
    NetworkingEnabled=true
    WirelessEnabled=true
    WWANEnabled=true
    WimaxEnabled=true
    sudo: hwinfo: command not found
    root       885  0.0  0.1 345060 12376 ?        Ssl  00:24   0:03 NetworkManager
    root      1038  0.0  0.0  30616  5072 ?        Ss   00:24   0:18 /sbin/wpa_supplicant -B -P /run/sendsigs.omit.d/wpasupplicant.pid -u -s -O /var/run/wpa_supplicant
    nobody    1134  0.0  0.0  35232  3328 ?        S    00:24   0:00 /usr/sbin/dnsmasq --no-resolv --keep-in-foreground --no-hosts --bind-interfaces --pid-file=/run/sendsigs.omit.d/network-manager.dnsmasq.pid --listen-address=127.0.1.1 --conf-file=/var/run/NetworkManager/dnsmasq.conf --cache-size=0 --proxy-dnssec --enable-dbus=org.freedesktop.NetworkManager.dnsmasq --conf-dir=/etc/NetworkManager/dnsmasq.d
    root     19241  0.0  0.0  10236  5288 ?        S    10:28   0:00 /sbin/dhclient -d -sf /usr/lib/NetworkManager/nm-dhcp-client.action -pf /run/sendsigs.omit.d/network-manager.dhclient-eth0.pid -lf /var/lib/NetworkManager/dhclient-952e8414-1b72-44f7-847f-a993a0d6d46a-eth0.lease -cf /var/lib/NetworkManager/dhclient-eth0.conf eth0
    lee      19785  0.0  0.0  15952  2196 pts/5    S+   12:01   0:00 grep --color=auto -E wpa|icd|etwork
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
    0.0.0.0         192.168.1.253   0.0.0.0         UG        0 0          0 eth0
    192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
    #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
    nameserver 127.0.1.1
    total 60729
        2 drwxr-xr-x  4 root root     1024 May 30 16:25 .
        2 drwxr-xr-x 23 root root     4096 May 30 16:23 ..
       13 -rw-r--r--  1 root root  1207386 Jan 15 18:22 abi-3.16.0-30-generic
       23 -rw-r--r--  1 root root  1207096 May  8 11:44 abi-3.16.0-38-generic
       14 -rw-r--r--  1 root root   171768 Jan 15 18:22 config-3.16.0-30-generic
       22 -rw-r--r--  1 root root   171817 May  8 11:44 config-3.16.0-38-generic
    32769 drwxr-xr-x  5 root root     1024 May 30 16:24 grub
       19 -rw-r--r--  1 root root 19444925 May 30 14:25 initrd.img-3.16.0-30-generic
       26 -rw-r--r--  1 root root 19446795 May 30 16:25 initrd.img-3.16.0-38-generic
       11 drwx------  2 root root    12288 May 30 14:17 lost+found
       15 -rw-r--r--  1 root root   176500 Mar 12  2014 memtest86+.bin
       16 -rw-r--r--  1 root root   178176 Mar 12  2014 memtest86+.elf
       17 -rw-r--r--  1 root root   178680 Mar 12  2014 memtest86+_multiboot.bin
       12 -rw-------  1 root root  3511040 Jan 15 18:22 System.map-3.16.0-30-generic
       21 -rw-------  1 root root  3513313 May  8 11:44 System.map-3.16.0-38-generic
       18 -rw-r--r--  1 root root  6345120 May 30 14:18 vmlinuz-3.16.0-30-generic
       20 -rw-------  1 root root  6351952 May  8 11:44 vmlinuz-3.16.0-38-generic
    Support status summary of 'ubuntubox':
    
    You have 54 packages (2.3%) supported until February 2016 (9m)
    You have 85 packages (3.6%) supported until May 2017 (3y)
    You have 92 packages (3.9%) supported until February 2015 (9m)
    You have 1911 packages (80.6%) supported until May 2019 (5y)
    
    You have 3 packages (0.1%) that can not/no longer be downloaded
    You have 227 packages (9.6%) that are unsupported
    
    Run with --show-unsupported, --show-supported or --show-all to see more details
    Downloaded daily snapshot dated 2015-05-31 03:15:01
    --2015-05-31 12:01:48--  http://www.linux-usb.org/usb.ids
    Resolving www.linux-usb.org (www.linux-usb.org)... 216.34.181.97
    Connecting to www.linux-usb.org (www.linux-usb.org)|216.34.181.97|:80... connected.
    HTTP request sent, awaiting response... 200 OK
    Length: 547006 (534K) [text/plain]
    Saving to: ‘/var/lib/usbutils/usb.ids.new’
    
    100%[==============================>] 547,006      440KB/s   in 1.2s   
    
    2015-05-31 12:01:50 (440 KB/s) - ‘/var/lib/usbutils/usb.ids.new’ saved [547006/547006]
    
    Done.
    Module                  Size  Used by
    nls_iso8859_1          12713  1 
    pci_stub               12622  1 
    vboxpci                23194  0 
    vboxnetadp             25670  0 
    vboxnetflt             27613  0 
    vboxdrv               405920  3 vboxnetadp,vboxnetflt,vboxpci
    bnep                   19624  2 
    rfcomm                 69509  8 
    snd_hda_codec_realtek    77467  1 
    snd_hda_codec_generic    69011  1 snd_hda_codec_realtek
    snd_hda_codec_hdmi     47548  1 
    hp_wmi                 14109  0 
    sparse_keymap          13948  1 hp_wmi
    arc4                   12608  2 
    kvm                   452088  0 
    crct10dif_pclmul       14307  0 
    crc32_pclmul           13133  0 
    ghash_clmulni_intel    13230  0 
    aesni_intel           152552  0 
    aes_x86_64             17131  1 aesni_intel
    lrw                    13286  1 aesni_intel
    gf128mul               14951  1 lrw
    glue_helper            13990  1 aesni_intel
    ablk_helper            13597  1 aesni_intel
    cryptd                 20359  3 ghash_clmulni_intel,aesni_intel,ablk_helper
    uvcvideo               81073  0 
    videobuf2_vmalloc      13216  1 uvcvideo
    videobuf2_memops       13362  1 videobuf2_vmalloc
    videobuf2_core         59104  1 uvcvideo
    v4l2_common            15681  1 videobuf2_core
    snd_hda_intel          30469  5 
    snd_hda_controller     30228  1 snd_hda_intel
    videodev              153793  3 uvcvideo,v4l2_common,videobuf2_core
    joydev                 17393  0 
    snd_hda_codec         139682  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
    serio_raw              13483  0 
    snd_hwdep              17698  1 snd_hda_codec
    snd_seq_midi           13564  0 
    media                  21903  2 uvcvideo,videodev
    snd_seq_midi_event     14899  1 snd_seq_midi
    snd_pcm               104112  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
    snd_rawmidi            30876  1 snd_seq_midi
    k10temp                13144  0 
    snd_seq                63074  2 snd_seq_midi_event,snd_seq_midi
    edac_core              56549  0 
    edac_mce_amd           22578  0 
    i2c_piix4              22166  0 
    btusb                  32497  0 
    bluetooth             446409  22 bnep,btusb,rfcomm
    radeon               1412941  4 
    rtl8723be              85054  0 
    6lowpan_iphc           18702  1 bluetooth
    btcoexist              50304  1 rtl8723be
    rtsx_pci_ms            18168  0 
    rtl8723_common         23361  1 rtl8723be
    rtl_pci                26690  1 rtl8723be
    rtlwifi                64255  2 rtl_pci,rtl8723be
    snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
    memstick               16966  1 rtsx_pci_ms
    snd_timer              29562  2 snd_pcm,snd_seq
    mac80211              652777  3 rtl_pci,rtlwifi,rtl8723be
    ttm                    93588  1 radeon
    cfg80211              494362  2 mac80211,rtlwifi
    snd                    79468  21 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
    drm_kms_helper         61574  1 radeon
    drm                   311018  7 ttm,drm_kms_helper,radeon
    shpchp                 37047  0 
    soundcore              15047  2 snd,snd_hda_codec
    i2c_algo_bit           13413  1 radeon
    wmi                    19193  1 hp_wmi
    parport_pc             32741  0 
    ppdev                  17671  0 
    hp_accel               26034  0 
    lis3lv02d              20156  1 hp_accel
    lp                     17759  0 
    input_polldev          14607  1 lis3lv02d
    video                  20128  0 
    parport                42348  3 lp,ppdev,parport_pc
    tpm_infineon           17131  0 
    mac_hid                13227  0 
    hp_wireless            12637  0 
    mmc_block              36056  2 
    rtsx_pci_sdmmc         23043  0 
    psmouse               106610  0 
    rtsx_pci               46259  2 rtsx_pci_ms,rtsx_pci_sdmmc
    ahci                   34062  5 
    r8169                  71694  0 
    libahci                32424  1 ahci
    mii                    13934  1 r8169
    Hopefully this is better info!

    **UPDATE #2**
    Further news... I ran the following commands and I can now SEE the wireless networks available to me:
    Code:
    lee@xxxxxxx:~$ sudo modprobe  rtl8723be msi=0
    [sudo] password for lee: 
    lee@xxxxxxx:~$ more /sys/module/rtl8723be/parameters/msi 
    N
    lee@xxxxxxx:~$ sudo modprobe -r rtl8723be
    lee@xxxxxxx:~$ sudo modprobe rtl8723be msi=1
    lee@xxxxxxx:~$ more /sys/module/rtl8723be/parameters/msi
    Y
    However: still doesn't connect to the selected network. It makes out like it's trying to and then tells me it's disconnected from the network...
    ...and so it continues.

    **UPDATE #3**
    Update #2 is persistent on log-out/log-in, but not on reboot. Oh well....next!
    Last edited by lbbarber24; May 31st, 2015 at 02:29 PM. Reason: **UPDATE #3**

  2. #2
    Join Date
    Sep 2008
    Location
    Woking
    Beans
    31

    Re: Realtek RTL8723BE wifi card -no networks found!

    hello. got exactly the same stuff (got that hp from ebuyer. thought it was ubuntu compatible. hw issue free) on mate 15.04. I used lubuntu 15.04 on dell 5yrs laptop.

    i tried few things but nothing worked so gave up .. it s friday .. had enough ... so i took my wifi from hp 5yrs old and stick it in the dell so now i have a good wifi but how frustrating it is

    i read your brilliant investigation but dont see how you solved it??

    also, why /usr on another partition?

    cheers
    Ubuntu 16.04
    Raspberry Pi Raspbian Jessie
    Qnap

  3. #3
    Join Date
    Jul 2011
    Beans
    21

    Re: Realtek RTL8723BE wifi card -no networks found!

    You can try what I was told to do. http://ubuntuforums.org/showthread.php?t=2282079 I replaced the stock driver, it seemed to rectify my issues.

  4. #4
    Join Date
    Sep 2008
    Location
    Woking
    Beans
    31

    Re: Realtek RTL8723BE wifi card -no networks found!

    Hi,

    i tried
    sudo add-apt-repository ppa:hanipouspilot/rtlwifi
    sudo apt-get update
    sudo apt-get install rtlwifi-new-dkms linux-firmware
    but no luck

    what i found weird is the rtlwifi is working ok with ubuntu 15.04 on my dell old laptop but not working with my new hp 455.
    same built on both
    thanks
    Ubuntu 16.04
    Raspberry Pi Raspbian Jessie
    Qnap

  5. #5
    Join Date
    Dec 2011
    Beans
    521

    Re: Realtek RTL8723BE wifi card -no networks found!

    Post output of

    lspci -knn | grep Net -A2
    rfkill list

    on your hp455

  6. #6
    Join Date
    Sep 2008
    Location
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    31

    Re: Realtek RTL8723BE wifi card -no networks found!

    Quote Originally Posted by Pilot6 View Post
    Post output of

    lspci -knn | grep Net -A2
    rfkill list

    on your hp455
    Code:
    louis@HP455G2:~$ lspci -knn | grep Net -A2
    02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
    	Subsystem: Hewlett-Packard Company Device [103c:2231]
    	Kernel driver in use: rtl8723be
    louis@HP455G2:~$ rfkill list
    0: hci0: Bluetooth
    	Soft blocked: no
    	Hard blocked: no
    1: phy0: Wireless LAN
    	Soft blocked: no
    	Hard blocked: no
    many thanks
    Ubuntu 16.04
    Raspberry Pi Raspbian Jessie
    Qnap

  7. #7
    Join Date
    Dec 2011
    Beans
    521

    Re: Realtek RTL8723BE wifi card -no networks found!

    It looks OK. What does

    iwconfig

    show?

  8. #8
    Join Date
    Sep 2008
    Location
    Woking
    Beans
    31

    Re: Realtek RTL8723BE wifi card -no networks found!

    hi i will give it a go tomorrow. anything else you want me to try?

    every time i m trying something i need to swap the wifi card in the laptop. thanks
    Ubuntu 16.04
    Raspberry Pi Raspbian Jessie
    Qnap

  9. #9
    Join Date
    Sep 2008
    Location
    Woking
    Beans
    31

    Re: Realtek RTL8723BE wifi card -no networks found!

    Quote Originally Posted by Pilot6 View Post
    It looks OK. What does

    iwconfig

    show?
    hello, sorry for the late reply. i ve re built the laptop using ubuntu 14.04 LTS

    did
    sudo add-apt-repository ppa:hanipouspilot/rtlwifi
    sudo apt-get update
    sudo apt-get install rtlwifi-new-dkms linux-firmware

    still not working (working fine on windows 10)

    and to answer the question above. thanks

    HP-455-G2:~$ iwconfig
    eth0 no wireless extensions.

    wlan0 IEEE 802.11bgn ESSIDff/any
    Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
    Retry short limit:7 RTS thr=2347 B Fragment thrff
    Power Managementff

    lo no wireless extensions.
    Ubuntu 16.04
    Raspberry Pi Raspbian Jessie
    Qnap

  10. #10
    Join Date
    Dec 2015
    Beans
    1

    Re: Realtek RTL8723BE wifi card -no networks found!

    i have the same card, and the problem is whith the power managment, so you need to turn off.
    to shut down the power managment you just write this line in the console:

    sudo echo "options rtl8723be fwlps=0">/etc/modprobe.d/rtl8723be.conf

    restart and problem solved.
    i have one week without the problem.
    i found the solution in this page:
    https://sites.google.com/site/easyli...8723BE-chipset

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