No webcam resuming from suspend to ram

[Mariano Draghi]

Binary package hint: pm-utils

On resuming from suspend, the laptop integrated webcam no longer works.

I found a workaround in a Ubuntu Forums thread, consisting in create the file /etc/pm/config.d/webcam with the following content:
SUSPEND_MODULES=uvcvideo

That works, but I'm not sure if it is a proper and/or recommended solution. Besides, if that's correct, such configuration should be a default.

Please, let me know if there's any extra information needed to diagnose the issue!

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: pm-utils 1.4.1-2
ProcVersionSignature: Ubuntu 2.6.35-20.29-generic 2.6.35.4
Uname: Linux 2.6.35-20-generic x86_64
Architecture: amd64
CheckboxSubmission: e235fa7bdfe11c8a6e8eaf1e398b37ae
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Sat Sep 11 23:43:53 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
PackageArchitecture: all
ProcEnviron:
 LANG=es_ES.utf8
 SHELL=/bin/bash
SourcePackage: pm-utils

[Mariano Draghi (chaghi)]

During boot, the webcam is identified as follows:

Sep 8 17:00:16 ubuntu kernel: [ 8.128629] uvcvideo: Found UVC 1.00 device Laptop_Integrated_Webcam_2M (0c45:6407)
Sep 8 17:00:16 ubuntu kernel: [ 8.137417] input: Laptop_Integrated_Webcam_2M as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input5

The relevant line for the camera in lsusb output is:
Bus 001 Device 004: ID 0c45:6407 Microdia

The laptop is a Dell Studio 1458

[Chow Loong Jin (hyperair)]

I'm setting the package to linux, as that's where the uvcvideo.ko kernel module is. This bug is happening because the driver does not resume properly from a suspend-to-RAM session.

[Jeremy Foshee (jeremyfoshee)]

Hi Mariano,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

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[Mariano Draghi (chaghi)]

Hi Jeremy,

The issue is not reproducible with the last Maverick kernel image. I suppose it got fixed with one of the updates in the last couple of dates. Anyway, just for completeness, I also tested the daily-current mainline image (2.6.36-999.201009200905), and it worked.

I think this could be marked as "Fixed".

Thanks!