crs, the next step is to fully commit bisect from kernel 3.17 to 3.19 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 ?
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) 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/1454160 Title: External monitor is disabled after resume Status in linux package in Ubuntu: Incomplete Bug description: I have an external screen connected to my machine (T450s, via docking station) and after resuming from suspend, my external monitor is disabled. After some trial and error I made an interesting observation: The external monitor only stops working if suspend via systemctl suspend, sudo pm-suspend, or via the hotkey on my keyboard (K750). However, this problem does not occur if I suspend via the menu entry in the upper right corner. How is this even possible? Mapping the suspend command from the upper right corner to a hotkey would be a sufficient workaround. But which command is used by that button? ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3 Uname: Linux 3.19.0-15-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Tue May 12 11:10:31 2015 DistUpgraded: Fresh install DistroCodename: vivid DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:5036] InstallationDate: Installed on 2015-05-03 (9 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: LENOVO 20BWS03F00 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-15-generic root=/dev/mapper/vgubuntu-root ro quiet splash SourcePackage: xorg Symptom: display UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/10/2015 dmi.bios.vendor: LENOVO dmi.bios.version: JBET47WW (1.12 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BWS03F00 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJBET47WW(1.12):bd03/10/2015:svnLENOVO:pn20BWS03F00:pvrThinkPadT450s:rvnLENOVO:rn20BWS03F00:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BWS03F00 dmi.product.version: ThinkPad T450s dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.60-2 version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1 xserver.bootTime: Tue May 12 11:08:05 2015 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: xserver.version: 2:1.17.1-0ubuntu3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1454160/+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