Stephen Thirlwall: >"One question: should I be using the latest mainline kernel, or the latest drm-intel-nightly for the Kernel.org bug report?"
Given you would report this to the linux-gfx mailing list, you would want to emphasize you tested both drm-intel-nightly and latest mainline kernel. However, to speak to Peter Frühberger's point, if a confirmed regression occurred in the mainline kernel series, and persists all the way up to drm-intel-nightly, it is highly probable upstream will ask for a bisection, and the report may stall on that unfortunately. Hence, the next step is to fully commit bisect the mainline kernel (not Ubuntu repository kernel) from kernel 3.19.8-ckt4 to 3.19.8-ckt5 in order to identify the last good kernel commit, followed immediately by the first bad one. This will allow for a more expedited analysis of the root cause of your issue. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection ? Thank you for your understanding. ** Changed in: linux (Ubuntu Vivid) Status: Triaged => Incomplete ** Tags removed: bisect-done ** Tags added: needs-bisect -- 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/1507994 Title: Broadwell vaapi video decode broken by i915_bpo migration Status in linux package in Ubuntu: Confirmed Status in linux source package in Vivid: Incomplete Status in linux source package in Wily: Confirmed Bug description: Since upgrading from linux-image-3.19.0-28-generic to linux- image-3.19.0-30-generic, vaapi-accelerated video playback on Kodi 15.2 (and 15.1) is now all black. On-screen display items (eg. elapsed time) and audio still work, but the decoded video content is now all black. Disabling vaapi acceleration in the Kodi options restores the video playback. I have bisected the problem to this commit: http://kernel.ubuntu.com/git/ubuntu/ubuntu- vivid.git/commit/?id=059c4a45e7a0233ab06b16f591a7877d11f6d79c The problem still happens in Ubuntu-3.19.0-31.36, as well as Ubuntu-4.0.0-1.2 and Ubuntu-4.2.0-16.19 from the ubuntu-wily repo. It appears that the above commit flicks the switch on many changes, and doesn't really shed too much light on what the actual problem might be. I've tried moving that commit earlier into the history in the hope that I might be able to find a 'good' point to bisect from, but had no luck. The furthest I was able to push it back was http://kernel.ubuntu.com/git/ubuntu/ubuntu- vivid.git/commit/?id=59b6d9aaa4c379d84930598183cb4911a2713ff4, but the problem remained. ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-30-generic 3.19.0-30.34 ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6 Uname: Linux 3.19.0-30-generic x86_64 ApportVersion: 2.17.2-0ubuntu1.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sdt 1916 F.... kodi.bin Date: Tue Oct 20 21:39:48 2015 InstallationDate: Installed on 2015-05-03 (170 days ago) InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64 (20141022.2) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=fb2f2c21-efe7-405c-b354-4a462517f241 ro RelatedPackageVersions: linux-restricted-modules-3.19.0-30-generic N/A linux-backports-modules-3.19.0-30-generic N/A linux-firmware 1.143.3 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to vivid on 2015-05-03 (170 days ago) dmi.bios.date: 08/12/2015 dmi.bios.vendor: Intel Corporation dmi.bios.version: RYBDWi35.86A.0350.2015.0812.1722 dmi.board.name: NUC5i3RYB dmi.board.vendor: Intel Corporation dmi.board.version: H41000-502 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0350.2015.0812.1722:bd08/12/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5i3RYB:rvrH41000-502:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1507994/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
