Thanks Daniel for looking into this! Here is how I came into this bug: I installed 18.04 from scratch a day after it got released.
Twice per day I close the lid of my laptop and open it again after. Usually it immediately asks me for the password and brings me back to what I was doing. But 30% of the time, it takes a long time (like a minute) before showing me... not a password prompt, but instead, a login screen (like if I had not yet a session) asking me to choose my user (there is only one user), then enter my password. It then starts to load... and asks me for my password AGAIN. Then it shows my desktop, but everything I was doing before is gone, no more open windows. All of my virtual machines in "Aborted" state. When I start Firefox it asks me whether I want to restore my tabs. When I open Byobu it shows my tabs as I left them (Byobu is designed to survive GUI crashes). -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1772362 Title: Xorg crashed with SIGBUS in ErrorFSigSafe(). Backtrace: pixman_image_composite32() from fbComposite() Status in xorg-server package in Ubuntu: Confirmed Bug description: Info requested at https://bugs.launchpad.net/ubuntu/+source/xorg- server/+bug/1771716 ProblemType: Crash DistroRelease: Ubuntu 18.04 Package: xserver-xorg-core 2:1.19.6-1ubuntu4 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CrashCounter: 1 CurrentDesktop: ubuntu:GNOME Date: Mon May 21 15:56:48 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: virtualbox, 5.2.10, 4.15.0-20-generic, x86_64: installed ExecutablePath: /usr/lib/xorg/Xorg ExecutableTimestamp: 1523633505 ExtraDebuggingInterest: Yes GconfCompiz: /apps/compiz-1/plugins: /apps/compiz-1/plugins/unityshell: /apps/compiz-1/plugins/unityshell/screen0: /apps/compiz-1/plugins/unityshell/screen0/options: show_launcher = GraphicsCard: Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo HD Graphics 5500 [17aa:2223] InstallationDate: Installed on 2018-04-29 (21 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: LENOVO 20CKCTO1WW ProcCmdline: /usr/lib/xorg/Xorg vt1 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -background none -noreset -keeptty -verbose 7 -core ProcCwd: /home/nico ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-20-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash Signal: 7 SourcePackage: xorg-server StacktraceTop: ErrorFSigSafe () xorg_backtrace () () <signal handler called> () at /lib/x86_64-linux-gnu/libpthread.so.0 () at /usr/lib/x86_64-linux-gnu/libpixman-1.so.0 Title: Xorg crashed with signal 7 in ErrorFSigSafe() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo dmi.bios.date: 08/20/2015 dmi.bios.vendor: LENOVO dmi.bios.version: N11ET34W (1.10 ) dmi.board.asset.tag: Not Available dmi.board.name: 20CKCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN11ET34W(1.10):bd08/20/2015:svnLENOVO:pn20CKCTO1WW:pvrThinkPadT550:rvnLENOVO:rn20CKCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T550 dmi.product.name: 20CKCTO1WW dmi.product.version: ThinkPad T550 dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1772362/+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
