SilverFire, thank you for reporting this and helping make Ubuntu better. As per http://support.lenovo.com/us/en/products/laptops-and-netbooks /thinkpad-edge-laptops/thinkpad-edge-e540 an update to your computer's buggy and outdated BIOS is available (2.22). If you update to this following https://help.ubuntu.com/community/BIOSUpdate does it change anything?
If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. Once the BIOS is updated, if the problem is still reproducible, and the information above is provided, then please mark this report Status New. Otherwise, please mark this as Invalid. Thank you for your understanding. ** Tags added: bios-outdated-2.20 ** Changed in: xorg (Ubuntu) Importance: Undecided => Low ** Changed in: xorg (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1519279 Title: Xorg segfault on external display plug/unplug Status in xorg package in Ubuntu: Incomplete Bug description: Lenovo Thinkpad E540, Ubuntu 15.10, xorg 1:7.7+7ubuntu4, driver NVIDIA 352.63 (also reproduces with NVIDIA 340.96 and nouveau) When I plug/unplug external display (VGA or HDMI), X server crashes with the following backtrace: [ 115.212] (II) XKB: reuse xkmfile /var/lib/xkb/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm [ 116.571] (EE) [ 116.571] (EE) Backtrace: [ 116.571] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x564e760ab68e] [ 116.571] (EE) 1: /usr/bin/X (0x564e75ef7000+0x1b89f9) [0x564e760af9f9] [ 116.571] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f1d7f12b000+0x352f0) [0x7f1d7f1602f0] [ 116.571] (EE) 3: /usr/bin/X (DamageRegister+0x11) [0x564e760323e1] [ 116.571] (EE) 4: /usr/bin/X (0x564e75ef7000+0xd9b08) [0x564e75fd0b08] [ 116.571] (EE) 5: /usr/bin/X (BlockHandler+0x8a) [0x564e75f53cca] [ 116.572] (EE) 6: /usr/bin/X (WaitForSomething+0x163) [0x564e760a83f3] [ 116.572] (EE) 7: /usr/bin/X (0x564e75ef7000+0x57fa1) [0x564e75f4efa1] [ 116.572] (EE) 8: /usr/bin/X (0x564e75ef7000+0x5c34b) [0x564e75f5334b] [ 116.572] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f1d7f14ba40] [ 116.572] (EE) 10: /usr/bin/X (_start+0x29) [0x564e75f3d6c9] [ 116.572] (EE) [ 116.572] (EE) Segmentation fault at address 0x10 [ 116.572] (EE) Fatal server error: [ 116.572] (EE) Caught signal 11 (Segmentation fault). Server aborting Expected - not to crash. The problem occurred after update from 15.04 to 15.10. See XorgLogOld.txt ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6 Uname: Linux 4.2.0-19-generic x86_64 NonfreeKernelModules: nvidia .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 352.63 Sat Nov 7 21:25:42 PST 2015 GCC version: gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2) ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 BootLog: fsck from util-linux 2.26.2 /dev/sdb2: clean, 370326/2040000 files, 4422836/8191744 blocks Date: Tue Nov 24 11:38:52 2015 DistUpgraded: 2015-11-06 11:48:36,801 DEBUG enabling apt cron job DistroCodename: wily DistroVariant: ubuntu DkmsStatus: bbswitch, 0.7, 4.2.0-18-generic, x86_64: installed bbswitch, 0.7, 4.2.0-19-generic, x86_64: installed nvidia-352, 352.63, 4.2.0-19-generic, x86_64: installed vboxhost, 5.0.2, 4.2.0-18-generic, x86_64: installed vboxhost, 5.0.2, 4.2.0-19-generic, x86_64: installed EcryptfsInUse: Yes GraphicsCard: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Lenovo Device [17aa:5040] Subsystem: Lenovo Device [17aa:5040] InstallationDate: Installed on 2015-08-21 (95 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: LENOVO 20C6A0DS00 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-19-generic.efi.signed root=UUID=9c7fde50-44fd-4663-900c-1446724ffc68 ro quiet splash vt.handoff=7 SourcePackage: xorg UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2015-11-06 (17 days ago) dmi.bios.date: 07/29/2015 dmi.bios.vendor: LENOVO dmi.bios.version: J9ET9AWW (2.20 ) dmi.board.asset.tag: Not Available dmi.board.name: 20C6A0DS00 dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrJ9ET9AWW(2.20):bd07/29/2015:svnLENOVO:pn20C6A0DS00:pvrThinkPadEdgeE540:rvnLENOVO:rn20C6A0DS00:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20C6A0DS00 dmi.product.version: ThinkPad Edge E540 dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.2+15.10.20151015-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.64-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20150808-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3 xserver.bootTime: Tue Nov 24 11:28:08 2015 xserver.configfile: /etc/X11/xorg.conf xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.17.2-1ubuntu9.1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1519279/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

