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#1 2012-04-14 02:58:19

Pres
Member
Registered: 2011-09-12
Posts: 423

Lockups with Kernel 3.3/Webcam

Been experiencing lockups the past few days. Seems to have started around the update to kernel 3.3. I've been trying to isolate what's causing it the past few days (since there really is no other good way) and have discovered it always happens during a skype call. Haven't had any lockups without skype open. Disabled apparmor (which I use with skype) just to make sure that wasn't causing any issues, still locks up with skype.

These lockups are complete lockups. I cannot get any response. I've tried SSHing in and enabling magic sysrq keys. No response.

Here's an example from messages.log during a lockup:

Apr 12 21:04:20 localhost kernel: [10659.514801] type=1400 audit(1334279060.030:263024): apparmor="ALLOWED" operation="file_mprotect" parent=16013 profile="/usr/lib/chromium/chromium-sandbox" name="/usr/lib/chromium/chromium-sandbox" pid=16264 comm="chromium-sandbo" requested_mask="Apr 12 21:09:03 localhost kernel: [    0.000000] Initializing cgroup subsys cpuset
Apr 12 21:09:03 localhost kernel: [    0.000000] Initializing cgroup subsys cpu

As you can see there, it stopped writing to the log mid-line.

I've gone ahead and downgraded to kernel 3.2.14 after the lastest lockup just now to make sure it is kernel 3.3/skype that is the problem. I'll comment back in a few days on this.

Anyone else experiencing anything similiar?

Last edited by Pres (2012-04-15 05:24:16)

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#2 2012-04-14 03:20:42

brebs
Member
Registered: 2007-04-03
Posts: 3,425

Re: Lockups with Kernel 3.3/Webcam

A call with video? Maybe a problem with the webcam.

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#3 2012-04-14 03:28:29

Pres
Member
Registered: 2011-09-12
Posts: 423

Re: Lockups with Kernel 3.3/Webcam

Yes I was just thinking that a minute ago. As far as I can remember, it's only happened with my webcam on (don't have it on all the time while using skype). Could possibly be a webcam issue, but it's hard to debug with no logs to check. I'll try out other webcam apps to test.

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#4 2012-04-14 06:20:32

cleanrock
Member
Registered: 2008-11-17
Posts: 108

Re: Lockups with Kernel 3.3/Webcam

If you are running nvidia it is probably 295.40 which is the bad apple, people are downgrading to 295.33 or https://bbs.archlinux.org/viewtopic.php?id=139276.

Last edited by cleanrock (2012-04-14 06:22:24)

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#5 2012-04-15 05:24:00

Pres
Member
Registered: 2011-09-12
Posts: 423

Re: Lockups with Kernel 3.3/Webcam

I'm running an ATI 5670 with fglrx.

Tried again with kernel 3.3.1 and it froze with Cheese open after about 20 minutes, so this seems to be a webcam problem instead of an issue with Skype. The kernel in testing 3.3.2 also locks up, so I'll just stay on 3.2.14 for now.

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#6 2012-04-15 23:17:20

lynnwood
Member
Registered: 2011-02-05
Posts: 7

Re: Lockups with Kernel 3.3/Webcam

having webcam problem too. Mine is a HP Webcam (/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5:1.0/input/input9),
Skype video calls and V4L2 test Utility both just freeze up my laptop.
running 3.3.1-1-ARCH

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#7 2012-04-18 13:43:21

Dead Code
Member
Registered: 2009-01-18
Posts: 227

Re: Lockups with Kernel 3.3/Webcam

Same problem over here. Skype as well as Google Talk locks up the system entirely. I have a Philips webcam (not so great) but started noticing it after the Kernel 3.3 update). Right now on 3.3.2-1-ARCH.

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#8 2012-04-23 06:02:57

Dead Code
Member
Registered: 2009-01-18
Posts: 227

Re: Lockups with Kernel 3.3/Webcam

I found a workaround https://bugzilla.redhat.com/show_bug.cgi?id=808188

I'll probably try this after going back home.

$ sudo -c 'echo options uvcvideo nodrop=1 >> /etc/modprobe.d/uvcvideo.conf &&
rmmod uvcvideo && modprobe uvcvideo'

Last edited by Dead Code (2012-04-23 06:07:04)

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#9 2012-05-21 13:52:19

Krawen
Member
Registered: 2012-05-21
Posts: 2

Re: Lockups with Kernel 3.3/Webcam

I observed the same behaviour on my laptop. But yesterday everything was working fine with Kernel 3.3.6 during a longer video call.

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#10 2012-05-30 02:07:51

lynnwood
Member
Registered: 2011-02-05
Posts: 7

Re: Lockups with Kernel 3.3/Webcam

Still have same problem with Kernel 3.3.7.
Workaround noted by Dead Code above works like a charm.

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#11 2012-10-08 16:11:42

Lekensteyn
Member
From: Netherlands
Registered: 2012-06-19
Posts: 179
Website

Re: Lockups with Kernel 3.3/Webcam

Just to let you know, the bug you have been experiencing is likely https://bugs.archlinux.org/task/31074 which was fixed since linux 3.5.4-1.

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