Bug 833519

Summary: uvcvideo issue with kernel 3.5.0-rc2 and rc3
Product: [Fedora] Fedora Reporter: Martin Kho <rh-bugzilla>
Component: kernelAssignee: Mauro Carvalho Chehab <mchehab>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: gansalmon, itamar, jonathan, kernel-maint, lwang, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard: uvcvideo first=3.5.0-0.rc0.git9.2 tested=3.5.0-0.rc3.git0.2 regression-from=3.4
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-07-17 20:21:49 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
dmesg
none
/var/log/messages none

Description Martin Kho 2012-06-19 16:10:31 UTC 
Created attachment 592999 [details]
dmesg

Description of problem:

My logitech webcam c270 (046d:0825) fails to work with these kernels. In Fedora 17 it functions okay. It looks like a regression in the usb-code or uvc-driver [1]

When I remove the webcam the kernel crashes with the following message:
"khubd/21 is trying to acquire lock". See further /var/log/messages.

[1] http://www.spinics.net/lists/linux-media/msg49077.html

Version-Release number of selected component (if applicable):
3.5.0-0.rc2.git0.1.fc18.x86_64
3.5.0-0.rc2.git0.3.fc18.x86_64
3.5.0-0.rc3.git0.2.fc18.x86_64

How reproducible:
Always

Steps to Reproduce:
1. boot system --> see messages in dmesg
2. run kamoso (KDE) or Cheese (Gnome) -> no webcam
3. see dmesg -> probe of webcam fails
  
Actual results:
no webcam

Expected results:
light webcam turns on, kamoso/cheese shows image

Additional info:
In /var/log/message you'll see that systemd-udevd taints the kernel. In the output it seems to be related to the sound system e.g card1. That's the microphone of the webcam.

Note: I'v added messages from the crash and the current running/latest kernel in one messages file. dmesg is from the latest kernel.
Comment 1 Martin Kho 2012-06-19 16:11:09 UTC 
Created attachment 593000 [details]
/var/log/messages
Comment 2 Josh Boyer 2012-06-19 16:54:33 UTC 
Which F17 kernels work?  Specifically, do the F17 3.4 kernel updates function correctly?
Comment 3 Martin Kho 2012-06-19 17:08:04 UTC 
Hi Josh,

All kernels - now running 3.4.2-4.fc17.x86_64 - have been working fine. No errors in /var/log/messages and dmesg.


Martin Kho
Comment 4 Martin Kho 2012-06-20 09:29:45 UTC 
Hi,

I've checked some older /var/log/messages - /var/log/messages-20120610 - and saw that the first kernel that showed the issues is 3.5.0-0.rc0.git9.2.fc18.x86_64. This kernel was the first one that was installed after upgrading the stable Fedora 17 KDE-liveCD. 3.5.0-0.rc2.git0.1 is the oldest kernel that is currently installed.

Hope this helps.

Martin Kho
Comment 5 Martin Kho 2012-07-15 08:47:14 UTC 
Hi,

FYI: Upstream bugreport [1] comment #6 speaks of a discussion on the alsa-devel list. A fix would land in mainstream soon.

HTH

Martin Kho


[1] https://bugzilla.kernel.org/show_bug.cgi?id=44281
Comment 6 Martin Kho 2012-07-15 08:51:35 UTC 
Hi,

Pressed somewhat too quick on Save Changes :-)

From [1] comment #54 it seems that kernel v3.5-rc7 contains a fix. As soon this kernel lands in rawhide I'll let you know if it works for me.


Martin Kho

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020
Comment 7 Martin Kho 2012-07-17 20:06:42 UTC 
Hi,

Kernel-3.5.0-0.rc7.git0.1.fc18.x86_64 indeed solved this issue. This report can be closed.

Thanks,

Martin Kho
Comment 8 Josh Boyer 2012-07-17 20:21:49 UTC 
Thank you for letting us know.  Your persistence in the bug is appreciated.