WARNING: at /build/buildd/linux-2.6.32/net/mac80211/scan.c:288 ieee80211_scan_completed+0x290/0x2a0 [mac80211]()

Have rebooted my computer twice since this occured and it has not happened again. So it seems pretty random

@Anton:

Unfortunately, this issue will be difficult to diagnose and solve without a reproduction case. If you happen to encounter the issue again, please post any relevant information into this bug report.

Thanks

adjusting back to incomplete as we are waiting on some further data from the reporter.

~JFo

This problem occurs regularly on my ThinkPad X200s. I just need to leave it up and running during the night (on WiFi connection). See my bug 540709.

There are around 10 duplicate bugs, first reports were reporting on Karmic (beta time) and none of them have received any feedback from developers. I will close all of them as duplicate as this one (which is the only one with some discussion).

This doesn't happen very often on my computer anymore, I don't think it has happened for a few weeks now. So I'm afraid I don't have any more data to give to help solving this issue

I added bug #551882 which looks the same but I got this after suspend/resume.

It happens often on my Sony Vaio VPCF11C5E.

It hangs while scanning wifi net and the connection to my lan is very slow, sometimes it fails.

Here the trace:

[ 2302.601112] ------------[ cut here ]------------
[ 2302.601143] WARNING: at /build/buildd/linux-2.6.32/net/mac80211/scan.c:285 ieee80211_scan_completed+0x10f/0x310 [mac80211]()
[ 2302.601149] Hardware name: VPCF11C5E
[ 2302.601151] Modules linked in: binfmt_misc rfcomm ppdev sco bridge stp bnep l2cap snd_hda_codec_nvhdmi snd_hda_codec_realtek snd_hda_intel arc4 snd_pcm_oss snd_hda_codec snd_hwdep snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event fbcon snd_seq iwlagn tileblit uvcvideo font bitblit snd_timer softcursor nvidia(P) iwlcore joydev sdhci_pci mac80211 btusb videodev snd_seq_device bluetooth v4l1_compat v4l2_compat_ioctl32 psmouse serio_raw snd sdhci led_class vga16fb vgastate cfg80211 soundcore snd_page_alloc sony_laptop video output lp parport usbhid hid ohci1394 ahci sky2 ieee1394
[ 2302.601233] Pid: 1014, comm: iwlagn Tainted: P W 2.6.32-23-generic #37-Ubuntu
[ 2302.601239] Call Trace:
[ 2302.601252] [<ffffffff81066dbb>] warn_slowpath_common+0x7b/0xc0
[ 2302.601259] [<ffffffff81066e14>] warn_slowpath_null+0x14/0x20
[ 2302.601277] [<ffffffffa01725cf>] ieee80211_scan_completed+0x10f/0x310 [mac80211]
[ 2302.601294] [<ffffffffa01d0ed0>] ? iwl_bg_scan_completed+0x0/0x90 [iwlcore]
[ 2302.601309] [<ffffffffa01d0f19>] iwl_bg_scan_completed+0x49/0x90 [iwlcore]
[ 2302.601319] [<ffffffff81080867>] run_workqueue+0xc7/0x1a0
[ 2302.601326] [<ffffffff810809e3>] worker_thread+0xa3/0x110
[ 2302.601333] [<ffffffff81085430>] ? autoremove_wake_function+0x0/0x40
[ 2302.601340] [<ffffffff81080940>] ? worker_thread+0x0/0x110
[ 2302.601346] [<ffffffff810850b6>] kthread+0x96/0xa0
[ 2302.601354] [<ffffffff810141ea>] child_rip+0xa/0x20
[ 2302.601360] [<ffffffff81085020>] ? kthread+0x0/0xa0
[ 2302.601366] [<ffffffff810141e0>] ? child_rip+0x0/0x20
[ 2302.601370] ---[ end trace d0df1f460eba4003 ]---
[ 2302.601373] ------------[ cut here ]------------

Anton Eliasson, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder, but the one at the top) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.13-rc4

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]