If you can, please file a separate bug for uvcvideo with a stacktrace. Then please link those bugs
The easiest way is probably by using apport on the crash file, I guess. On Thu, Apr 12, 2018, 17:21 emk2203 <1708...@bugs.launchpad.net> wrote: > Original reporter here. I am willing to assist wherever I can, but I > reported chiefly because I cannot debug or investigate of my own. > > Regarding the cheese issue, the exact same issue arises when just using > uvcvideo, so it is definitely something passed on from the driver. > > 2018-04-12 15:52 GMT+02:00 Reinhard Tartler <siret...@gmail.com>: > > > Looking at the stacktrace, this is coming from /usr/bin/cheese. Even > > with bad input from the driver (which seems like a valid issue to > > investigate and improve) - an error message is preferable to a SIGFPE as > > seen in the initial report. > > > > ** Also affects: linux via > > https://trac.ffmpeg.org/ticket/4795 > > Importance: Unknown > > Status: Unknown > > > > ** No longer affects: linux > > > > ** Changed in: ffmpeg (Ubuntu) > > Importance: Undecided => Low > > > > ** Also affects: cheese (Ubuntu) > > Importance: Undecided > > Status: New > > > > ** Changed in: cheese (Ubuntu) > > Importance: Undecided => Medium > > > > ** Changed in: cheese (Ubuntu) > > Status: New => Confirmed > > > > -- > > You received this bug notification because you are subscribed to the bug > > report. > > https://bugs.launchpad.net/bugs/1708922 > > > > Title: > > uvcvideo module does not work with Dell XPS 12 webcam > > > > To manage notifications about this bug go to: > > https://bugs.launchpad.net/ubuntu/+source/cheese/+bug/ > > 1708922/+subscriptions > > > > -- > You received this bug notification because you are a member of MOTU > Media Team, which is subscribed to ffmpeg in Ubuntu. > https://bugs.launchpad.net/bugs/1708922 > > Title: > uvcvideo module does not work with Dell XPS 12 webcam > > To manage notifications about this bug go to: > > https://bugs.launchpad.net/ubuntu/+source/cheese/+bug/1708922/+subscriptions > > Launchpad-Notification-Type: bug > Launchpad-Bug: distribution=ubuntu; sourcepackage=cheese; component=main; > status=Confirmed; importance=Medium; assignee=None; > Launchpad-Bug: distribution=ubuntu; sourcepackage=ffmpeg; > component=universe; status=Incomplete; importance=Low; assignee=None; > Launchpad-Bug: distribution=ubuntu; sourcepackage=linux; component=main; > status=Incomplete; importance=Medium; assignee=None; > Launchpad-Bug-Tags: amd64 apport-crash artful gstreamer-error > Launchpad-Bug-Information-Type: Public > Launchpad-Bug-Private: no > Launchpad-Bug-Security-Vulnerability: no > Launchpad-Bug-Commenters: apport emk2203 janitor jcowgill kaihengfeng > siretart ubuntu-kernel-bot > Launchpad-Bug-Reporter: emk2203 (emk2203) > Launchpad-Bug-Modifier: emk2203 (emk2203) > Launchpad-Message-Rationale: Subscriber (ffmpeg in Ubuntu) @motumedia > Launchpad-Message-For: motumedia > -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cheese in Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam Status in cheese package in Ubuntu: Confirmed Status in ffmpeg package in Ubuntu: Incomplete Status in linux package in Ubuntu: Incomplete Bug description: uvcvideo: Found UVC 1.00 device Integrated Webcam (0bda:5716) from Dell XPS 12 laptop (9Q33 version) does not work properly for several versions of the kernel now. guvcview nor cheese both show the issue, so it's the uvcvideo driver. Starting at 640x480 and higher resolutions, parts of lower half of video flickers / don't show image. Error messages: V4L2_CORE: (jpeg decoder) error while decoding frame V4L2_CORE: (jpeg decoder) Ignoring empty buffer V4L2_CORE: Error - Couldn't decode frame VLC seems to use another driver AND DOES NOT SHOW issue. ProblemType: Crash DistroRelease: Ubuntu 17.10 Package: cheese 3.24.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.11.0-10.15-generic 4.11.8 Uname: Linux 4.11.0-10-generic x86_64 ApportVersion: 2.20.6-0ubuntu4 Architecture: amd64 CrashCounter: 1 CurrentDesktop: GNOME Date: Sun Aug 6 12:15:28 2017 ExecutablePath: /usr/bin/cheese InstallationDate: Installed on 2017-04-01 (127 days ago) InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170331) MachineType: Dell Inc. XPS 12-9Q33 ProcCmdline: cheese ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash RelatedPackageVersions: cheese 3.24.0-0ubuntu1 cheese-common 3.24.0-0ubuntu1 Signal: 8 SourcePackage: linux StacktraceTop: cheese_camera_play () from /usr/lib/x86_64-linux-gnu/libcheese.so.8 ?? () g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 Title: cheese crashed with SIGFPE in cheese_camera_play() UpgradeStatus: Upgraded to artful on 2017-06-08 (59 days ago) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo dmi.bios.date: 03/03/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A08 dmi.board.name: XPS 12-9Q33 dmi.board.vendor: Dell Inc. dmi.board.version: A08 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA08:bd03/03/2015:svnDellInc.:pnXPS12-9Q33:pvrA08:rvnDellInc.:rnXPS12-9Q33:rvrA08:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: XPS 12-9Q33 dmi.product.version: A08 dmi.sys.vendor: Dell Inc. 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