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mdm27
September 12th, 2011, 08:06 PM
Dear all,

I'm fairly new to ubuntu so please go slowly. Also, please accept my apologies if this has already been answered previously. I've tried to find the answer elsewhere on the forums, but with little success.

In short, I have a wireless problem. I have installed Ubuntu on both my netbook and my desktop. My desktops is located such that it would be impossible to run a wired connection, so I also use wireless, with the help of an external USB adapter.

I have a strong wireless signal, but for reasons I simply don't understand, I will occasionally lose my connection. On my netbook, I will lose my connection if I close the screen. When I open it up again, no wireless networks are shown from the drop down menu at the top of the screen. I have to reboot the computer in order to get online, which is very annoying.

As far as my desktop is concerned, getting online is quite hit and miss. I will occasionally pick up the signal, but it will disappear at random intervals, particularly if the computer goes into standby mode.

Can anyone out there help? If you need more information, please let me know.

Thanks in advance for your assistance.

praseodym
September 12th, 2011, 09:25 PM
Hi,

please show the terminal outputs of


lsusb
lsmod
iwconfig
sudo iwlist scan

mdm27
September 13th, 2011, 08:57 AM
Hi,


thanks for replying. Output is a follows:


matthew@matthew-N140:~$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 0a5c:2151 Broadcom Corp.
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 0ac8:c33f Z-Star Microelectronics Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
matthew@matthew-N140:~$ lsmod
Module Size Used by
michael_mic 12540 4
arc4 12473 2
cryptd 19801 0
aes_i586 16956 1
aes_generic 38023 1 aes_i586
parport_pc 32111 0
ppdev 12849 0
snd_hda_codec_realtek 255882 1
binfmt_misc 13213 1
snd_hda_intel 24113 2
snd_hda_codec 90901 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13274 1 snd_hda_codec
snd_pcm 80042 2 snd_hda_intel,snd_hda_codec
r8192se_pci 482505 0
snd_seq_midi 13132 0
rfcomm 38125 8
snd_rawmidi 25269 1 snd_seq_midi
sco 17827 2
snd_seq_midi_event 14475 1 snd_seq_midi
bnep 17785 2
snd_seq 51291 2 snd_seq_midi,snd_seq_midi_event
i915 451033 3
l2cap 48656 16 rfcomm,bnep
joydev 17322 0
cfg80211 156212 1 r8192se_pci
snd_timer 28659 2 snd_pcm,snd_seq
snd_seq_device 14110 3 snd_seq_midi,snd_rawmidi,snd_seq
drm_kms_helper 40745 1 i915
uvcvideo 66851 0
btusb 18160 2
bluetooth 65493 9 rfcomm,sco,bnep,l2cap,btusb
drm 184164 4 i915,drm_kms_helper
snd 55295 13 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec, snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,sn d_seq_device
r8192e_pci 251260 0
videodev 75143 1 uvcvideo
psmouse 73312 0
i2c_algo_bit 13184 1 i915
soundcore 12600 1 snd
serio_raw 12990 0
snd_page_alloc 14073 2 snd_hda_intel,snd_pcm
video 18951 1 i915
lp 13349 0
parport 36746 3 parport_pc,ppdev,lp
r8169 42534 0
matthew@matthew-N140:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wlan0 802.11bg ESSID:"Sugar ****"
Mode:Managed Frequency=2.412 GHz Access Point: 1C:AF:F7:05:C1:5A
Bit Rate=54 Mb/s
Retry:on RTS thr:off Fragment thr:off
Power Management period:0us mode:All packets received
Link Quality=93/100 Signal level=-52 dBm Noise level=-116 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

mdm27
September 13th, 2011, 09:25 AM
Hi,


thanks for replying. Output is a follows:


matthew@matthew-N140:~$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 0a5c:2151 Broadcom Corp.
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 0ac8:c33f Z-Star Microelectronics Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
matthew@matthew-N140:~$ lsmod
Module Size Used by
michael_mic 12540 4
arc4 12473 2
cryptd 19801 0
aes_i586 16956 1
aes_generic 38023 1 aes_i586
parport_pc 32111 0
ppdev 12849 0
snd_hda_codec_realtek 255882 1
binfmt_misc 13213 1
snd_hda_intel 24113 2
snd_hda_codec 90901 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 13274 1 snd_hda_codec
snd_pcm 80042 2 snd_hda_intel,snd_hda_codec
r8192se_pci 482505 0
snd_seq_midi 13132 0
rfcomm 38125 8
snd_rawmidi 25269 1 snd_seq_midi
sco 17827 2
snd_seq_midi_event 14475 1 snd_seq_midi
bnep 17785 2
snd_seq 51291 2 snd_seq_midi,snd_seq_midi_event
i915 451033 3
l2cap 48656 16 rfcomm,bnep
joydev 17322 0
cfg80211 156212 1 r8192se_pci
snd_timer 28659 2 snd_pcm,snd_seq
snd_seq_device 14110 3 snd_seq_midi,snd_rawmidi,snd_seq
drm_kms_helper 40745 1 i915
uvcvideo 66851 0
btusb 18160 2
bluetooth 65493 9 rfcomm,sco,bnep,l2cap,btusb
drm 184164 4 i915,drm_kms_helper
snd 55295 13 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec, snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,sn d_seq_device
r8192e_pci 251260 0
videodev 75143 1 uvcvideo
psmouse 73312 0
i2c_algo_bit 13184 1 i915
soundcore 12600 1 snd
serio_raw 12990 0
snd_page_alloc 14073 2 snd_hda_intel,snd_pcm
video 18951 1 i915
lp 13349 0
parport 36746 3 parport_pc,ppdev,lp
r8169 42534 0
matthew@matthew-N140:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wlan0 802.11bg ESSID:"Sugar ****"
Mode:Managed Frequency=2.412 GHz Access Point: 1C:AF:F7:05:C1:5A
Bit Rate=54 Mb/s
Retry:on RTS thr:off Fragment thr:off
Power Management period:0us mode:All packets received
Link Quality=93/100 Signal level=-52 dBm Noise level=-116 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

praseodym
September 13th, 2011, 09:34 AM
Oh, ok, the problem is not the stick, right? Because its not plugged in. Please show:


lspci -nnk | grep -iA2 net
there are 2 drivers loaded for Realtek chips.

mdm27
September 13th, 2011, 02:14 PM
Thanks again for replying.

The output is as follows:


00:00.0 RAM memory [0500]: nVidia Corporation MCP78S [GeForce 8200] Memory Controller [10de:0754] (rev a2)
Subsystem: nVidia Corporation Device [10de:cb84]
00:01.0 ISA bridge [0601]: nVidia Corporation MCP78S [GeForce 8200] LPC Bridge [10de:075c] (rev a2)
Subsystem: nVidia Corporation Device [10de:cb84]
00:01.1 SMBus [0c05]: nVidia Corporation MCP78S [GeForce 8200] SMBus [10de:0752] (rev a1)
Subsystem: Acer Incorporated [ALI] Device [1025:0153]
Kernel driver in use: nForce2_smbus
Kernel modules: i2c-nforce2
00:01.2 RAM memory [0500]: nVidia Corporation MCP78S [GeForce 8200] Memory Controller [10de:0751] (rev a1)
Subsystem: nVidia Corporation Device [10de:cb84]
00:01.3 Co-processor [0b40]: nVidia Corporation MCP78S [GeForce 8200] Co-Processor [10de:0753] (rev a2)
Subsystem: Acer Incorporated [ALI] Device [1025:0153]
00:01.4 RAM memory [0500]: nVidia Corporation MCP78S [GeForce 8200] Memory Controller [10de:0568] (rev a1)
00:02.0 USB Controller [0c03]: nVidia Corporation MCP78S [GeForce 8200] OHCI USB 1.1 Controller [10de:077b] (rev a1)
Subsystem: nVidia Corporation Device [10de:cb84]
Kernel driver in use: ohci_hcd
00:02.1 USB Controller [0c03]: nVidia Corporation MCP78S [GeForce 8200] EHCI USB 2.0 Controller [10de:077c] (rev a1)
Subsystem: nVidia Corporation Device [10de:cb84]
Kernel driver in use: ehci_hcd
00:04.0 USB Controller [0c03]: nVidia Corporation MCP78S [GeForce 8200] OHCI USB 1.1 Controller [10de:077d] (rev a1)
Subsystem: nVidia Corporation Device [10de:cb84]
Kernel driver in use: ohci_hcd
00:04.1 USB Controller [0c03]: nVidia Corporation MCP78S [GeForce 8200] EHCI USB 2.0 Controller [10de:077e] (rev a1)
Subsystem: nVidia Corporation Device [10de:cb84]
Kernel driver in use: ehci_hcd
00:06.0 IDE interface [0101]: nVidia Corporation MCP78S [GeForce 8200] IDE [10de:0759] (rev a1)
Subsystem: nVidia Corporation Device [10de:cb84]
Kernel driver in use: pata_amd
Kernel modules: pata_amd
00:07.0 Audio device [0403]: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S High Definition Audio [10de:0774] (rev a1)
Subsystem: Acer Incorporated [ALI] Device [1025:0153]
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
00:08.0 PCI bridge [0604]: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge [10de:075a] (rev a1)
00:09.0 SATA controller [0106]: nVidia Corporation MCP78S [GeForce 8200] AHCI Controller [10de:0ad4] (rev a2)
Subsystem: Acer Incorporated [ALI] Device [1025:0153]
Kernel driver in use: ahci
Kernel modules: ahci
00:0a.0 Ethernet controller [0200]: nVidia Corporation MCP77 Ethernet [10de:0760] (rev a2)
Subsystem: Acer Incorporated [ALI] Device [1025:0153]
Kernel driver in use: forcedeth
Kernel modules: forcedeth
00:10.0 PCI bridge [0604]: nVidia Corporation MCP78S [GeForce 8200] PCI Express Bridge [10de:0778] (rev a1)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:12.0 PCI bridge [0604]: nVidia Corporation MCP78S [GeForce 8200] PCI Express Bridge [10de:075b] (rev a1)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:13.0 PCI bridge [0604]: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge [10de:077a] (rev a1)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration [1022:1200]
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor Address Map [1022:1201]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller [1022:1202]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control [1022:1203]
Kernel driver in use: k10temp
Kernel modules: k10temp
00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Family 10h Processor Link Control [1022:1204]
02:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV710 [Radeon HD 4350] [1002:954f]
Subsystem: PC Partner Limited Device [174b:e990]
Kernel driver in use: radeon
Kernel modules: radeon
02:00.1 Audio device [0403]: ATI Technologies Inc RV710/730 [1002:aa38]
Subsystem: PC Partner Limited R700 Audio Device [Radeon HD 4000 Series] [174b:aa38]
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
04:00.0 FireWire (IEEE 1394) [0c00]: VIA Technologies, Inc. VT6315 Series Firewire Controller [1106:3403]
Subsystem: Acer Incorporated [ALI] Device [1025:0153]
Kernel driver in use: firewire_ohci
Kernel modules: firewire-ohci

other output to follow in separate post

mdm27
September 13th, 2011, 02:18 PM
Don't think it is my USB stick because it works fine with windows, plus I don't have a USB on my laptop.

praseodym
September 13th, 2011, 03:05 PM
There is no card listed. Check your BIOS settings for a wireless device. Plus:


cat /etc/udev/rules.d/70-persistent-net.rules
rfkill list

Wired is working good?

mdm27
September 13th, 2011, 07:45 PM
sorry, how do I do that?

praseodym
September 13th, 2011, 07:49 PM
Reboot the computer and look at the button to press to enter the BIOS settings (ESC or F2 or F12...). Somewhere should be the possibility to enable/disable the wireless.