David Abergel, the next step is to fully reverse commit bisect from kernel 4.2 to 4.3 in order to identify the last bad commit, followed immediately by the first good one. Once this commit has been identified, then it may be reviewed as a candidate for backporting into your release. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F ?
Please note, finding adjacent kernel versions is not fully commit bisecting. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Changed in: linux (Ubuntu) Importance: Low => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1520751 Title: Kernel 4.2 does not detect external monitor Status in linux package in Ubuntu: Incomplete Bug description: On xubuntu 15.10. Kernel version 4.2.0-18-generic x86_64 does not detect an external monitor when it is connected via the minidisplay port. Using xrandr, I can force output to the monitor, but the maximum resolution is 1024x768 (I think). Hardware is a Dell XPS 13. Upgrading to the mainline kernel in the 4.3 version stream eliminates the problem. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-18-generic 4.2.0-18.22 ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3 Uname: Linux 4.2.0-18-generic x86_64 NonfreeKernelModules: openafs ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: dabergel 1783 F.... pulseaudio /dev/snd/controlC0: dabergel 1783 F.... pulseaudio CurrentDesktop: XFCE Date: Sat Nov 28 10:02:37 2015 HibernationDevice: RESUME=UUID=703c29b7-4b30-449e-8da6-1f926373c84b InstallationDate: Installed on 2015-05-04 (207 days ago) InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1) MachineType: Dell Inc. XPS 13 9343 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=1658dd66-913e-4ad3-8766-e821498ff4e7 ro nosmap quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.2.0-18-generic N/A linux-backports-modules-4.2.0-18-generic N/A linux-firmware 1.149.2 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2015-10-31 (27 days ago) dmi.bios.date: 03/25/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A03 dmi.board.name: 0F5KF3 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA03:bd03/25/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0F5KF3:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9343 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520751/+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
