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Bug 833519 - uvcvideo issue with kernel 3.5.0-rc2 and rc3
uvcvideo issue with kernel 3.5.0-rc2 and rc3
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
x86_64 Linux
unspecified Severity unspecified
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Assigned To: Mauro Carvalho Chehab
Fedora Extras Quality Assurance
uvcvideo first=3.5.0-0.rc0.git9.2 tes...
Depends On:
  Show dependency treegraph
Reported: 2012-06-19 12:10 EDT by Martin Kho
Modified: 2013-07-04 18:59 EDT (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2012-07-17 16:21:49 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
dmesg (66.32 KB, text/plain)
2012-06-19 12:10 EDT, Martin Kho
no flags Details
/var/log/messages (241.28 KB, text/plain)
2012-06-19 12:11 EDT, Martin Kho
no flags Details

  None (edit)
Description Martin Kho 2012-06-19 12:10:31 EDT
Created attachment 592999 [details]

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.


Version-Release number of selected component (if applicable):

How reproducible:

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 12:11:09 EDT
Created attachment 593000 [details]
Comment 2 Josh Boyer 2012-06-19 12:54:33 EDT
Which F17 kernels work?  Specifically, do the F17 3.4 kernel updates function correctly?
Comment 3 Martin Kho 2012-06-19 13:08:04 EDT
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 05:29:45 EDT

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 04:47:14 EDT

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


Martin Kho

Comment 6 Martin Kho 2012-07-15 04:51:35 EDT

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
Comment 7 Martin Kho 2012-07-17 16:06:42 EDT

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


Martin Kho
Comment 8 Josh Boyer 2012-07-17 16:21:49 EDT
Thank you for letting us know.  Your persistence in the bug is appreciated.

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