I've installed 3.19.0-031900-generic. The regression is fixed, partly.
VLC, Chrome and Firefox are able to use it again by their default settings. guvcview is not, the preview image is still lacking, however the warnings have changed, no more 'device busy', but several warnings instead: control id: 0x009a0901 failed to get value (error -1) control id: 0x009a0902 failed to get value (error -1) control id: 0x009a0903 failed to get value (error -1) control id: 0x009a0908 failed to get value (error -1) control id: 0x009a0909 failed to get value (error -1) control id: 0x009a090d failed to get value (error -1) guvcview was working well with 3.2 too. However, this may be an compatibility problem that is caused by guvcview's implementation details. If this is clarified, we nay tag 'kernel-fixed-upstream'. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1422680 Title: v4l2 regression: T420s built in camera stopped working Status in linux package in Ubuntu: Incomplete Bug description: The Chicony Electronics Camera (as built into for example Lenovo T420s) stopped working somewhere between kernel 3.2 and 3.13. I use both kernels in Ubuntu 12.04, and the camera works with the older one, so I filed the bug here as I don't know when it stopped working. The camera is still recognized by v4l2, properties can be accessed by v4l2-ctl for example, and seemed correctly reported back (pixelformats for exmaple match my expectation). But the frame capturing intself will always fail with 'device busy'. Usb IDs: 04f2:b221 Chicony Electronics Co., Ltd integrated camera What further information would be useful? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1422680/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp