PDA

View Full Version : [ubuntu] 11.10 WiFi connectivity issues Intel Wireless



hershey101
November 4th, 2011, 06:34 PM
Hi guys,
I have a Dell XPS M1545 and am running Ubuntu 11.10 x64. I have a Intel Centrino Advanced-N 6250 with WiMax. My wirless network card doesn't work. Can anyone help?



hersh@hersh-Studio-XPS-1645:~$ lspci | grep Network
05:00.0 Network controller: Intel Corporation Centrino Advanced-N + WiMAX 6250 (rev 35)
hersh@hersh-Studio-XPS-1645:~$ rfkill list all
0: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
1: dell-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: i2400m-usb:2-1.5:1.0: WiMAX
Soft blocked: yes
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
6: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

I think the issue is the drivers for the wireless card. They are very finicky... Once in a while (like right now) they will work, but most of the time I won't be able to connect to a wireless network (even though whenever I switch to Windows it works perfectly). Can someone help me figure out how to fix this?

praseodym
November 4th, 2011, 11:39 PM
Hi,

please show more infos:


lspci -nnk | grep -iA2 net
lsmod
iwconfig
sudo iwlist scan
dmesg | grep iwl
The driver iwlagn is buggy in the N-mode, see here:

http://ubuntuforums.org/showpost.php?p=11425909&postcount=2

hershey101
November 5th, 2011, 03:38 PM
Hi,

please show more infos:


lspci -nnk | grep -iA2 net
lsmod
iwconfig
sudo iwlist scan
dmesg | grep iwl
The driver iwlagn is buggy in the N-mode, see here:

http://ubuntuforums.org/showpost.php?p=11425909&postcount=2


Hi,
here is the information you requested



hersh@hersh-Studio-XPS-1645:~$ lspci -nnk | grep -iA2 net
05:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N + WiMAX 6250 [8086:0087] (rev 35)
Subsystem: Intel Corporation Centrino Advanced-N + WiMAX 6250 2x2 AGN [8086:1321]
Kernel driver in use: iwlagn
--
0b:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5784M Gigabit Ethernet PCIe [14e4:1698] (rev 10)
Subsystem: Dell Device [1028:02fe]
Kernel driver in use: tg3
hersh@hersh-Studio-XPS-1645:~$ lsmod
Module Size Used by
parport_pc 36962 0
ppdev 17113 0
vesafb 13809 1
joydev 17693 0
bnep 18436 2
rfcomm 47946 8
btusb 18600 2
bluetooth 166112 23 bnep,rfcomm,btusb
arc4 12529 2
snd_hda_codec_hdmi 32040 1
dell_wmi 12681 0
sparse_keymap 13890 1 dell_wmi
snd_hda_codec_idt 70553 1
dell_laptop 13831 0
dcdbas 14490 1 dell_laptop
i2400m_usb 36569 0
i2400m 107946 1 i2400m_usb
wimax 34762 1 i2400m
psmouse 73882 0
serio_raw 13166 0
snd_hda_intel 33390 3
snd_hda_codec 104802 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
uvcvideo 72711 0
binfmt_misc 17540 1
snd_hwdep 13668 1 snd_hda_codec
videodev 93004 1 uvcvideo
v4l2_compat_ioctl32 17083 1 videodev
snd_pcm 96755 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
i7core_edac 27942 0
edac_core 53746 3 i7core_edac
snd_seq_midi 13324 0
snd_rawmidi 30547 1 snd_seq_midi
ir_lirc_codec 12898 0
lirc_dev 19204 1 ir_lirc_codec
snd_seq_midi_event 14899 1 snd_seq_midi
ir_sony_decoder 12549 0
fglrx 2929009 105
ir_jvc_decoder 12546 0
snd_seq 61896 2 snd_seq_midi,snd_seq_midi_event
ir_rc6_decoder 12546 0
rc_rc6_mce 12502 0
ir_rc5_decoder 12546 0
snd_timer 29991 2 snd_pcm,snd_seq
snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
ir_nec_decoder 12546 0
ite_cir 25775 0
rc_core 26963 9 ir_lirc_codec,ir_sony_decoder,ir_jvc_decoder,ir_rc 6_decoder,rc_rc6_mce,ir_rc5_decoder,ir_nec_decoder ,ite_cir
video 19412 0
iwlagn 314213 0
wmi 19256 1 dell_wmi
mac80211 310872 1 iwlagn
snd 68266 16 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel ,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_s eq,snd_timer,snd_seq_device
cfg80211 199587 2 iwlagn,mac80211
soundcore 12680 1 snd
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
lp 17799 0
parport 46562 3 parport_pc,ppdev,lp
usbhid 47198 0
hid 95463 1 usbhid
ahci 26002 2
libahci 26861 1 ahci
firewire_ohci 40722 0
firewire_core 63626 1 firewire_ohci
sdhci_pci 14032 0
crc_itu_t 12707 1 firewire_core
tg3 147729 0
sdhci 32166 1 sdhci_pci
hersh@hersh-Studio-XPS-1645:~$ sudo iwlist scan
[sudo] password for hersh:
lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wmx0 Interface doesn't support scanning.

wlan0 Interface doesn't support scanning : Device or resource busy

ham0 Interface doesn't support scanning.

hersh@hersh-Studio-XPS-1645:~$ dmesg | grep iwl
[ 20.561001] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[ 20.561006] iwlagn: Copyright(c) 2003-2011 Intel Corporation
[ 20.561118] iwlagn 0000:05:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 20.561149] iwlagn 0000:05:00.0: setting latency timer to 64
[ 20.561217] iwlagn 0000:05:00.0: Detected Intel(R) Centrino(R) Advanced-N + WiMAX 6250 AGN, REV=0x84
[ 20.572087] iwlagn 0000:05:00.0: device EEPROM VER=0x536, CALIB=0x6
[ 20.572092] iwlagn 0000:05:00.0: Device SKU: 0Xb
[ 20.574888] iwlagn 0000:05:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
[ 20.575114] iwlagn 0000:05:00.0: irq 47 for MSI/MSI-X
[ 20.860661] iwlagn 0000:05:00.0: loaded firmware version 41.28.5.1 build 33926
[ 20.866836] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 48.349250] iwlagn 0000:05:00.0: iwlagn_tx_agg_start on ra = 00:1a:1e:62:c9:b0 tid = 0
[ 64.591327] iwlagn 0000:05:00.0: Aggregation not enabled for tid 0 because load = 3
[ 68.710198] iwlagn 0000:05:00.0: iwlagn_tx_agg_start on ra = 00:1a:1e:62:c9:b0 tid = 0



UPDATE: I tried following the instructions in the link you provided me and it seems to work now that I disabled the N but I'm not sure if this is because of that or it is one of those random occurrences where it works that I previously mentioned.

praseodym
November 5th, 2011, 04:08 PM
Check it with:


iwconfig
sudo iwlist wlan0 scan
iwlist wlan0 chan
dmesg | grep iwl
route -n

beriukay
November 28th, 2011, 12:02 PM
It seems that disabling the N-mode worked for me, too. Such a pity that N-mode doesn't work.

praseodym
November 28th, 2011, 12:15 PM
In 11.04 the N-mode was deactivated by default, but could normally be enabled without problems. In kernel 3 it seems quite buggy...