Public bug reported: Filed against Xorg due to selection limitations of apport. Mutter is the best guess of responsible application/package.
Automatic (timed) screen blanking (or manually locking the desktop) causes the wayland gnome-shell session to crash and drop to user login prompt. The monitor fades the background to black (but oddly the mouse cursor does not fade). The monitor blanks and goes into signal search and then power saving mode. Almost immediately the monitor switches back on, displaying the login prompt (note login and not unlock as would be expected). Thereafter the screen stays on indefinitely without further attempts to blank or power-save. Ubuntu artful 17.10 beta. Dell monitor at 1920x1080x60hz using hdmi connected to nvidia card with nouveau drivers on wayland session. Xorg session seems to work as expected. /var/crash is empty and manually running Apport and reproducing crash does not produce a crash report, as Apport crashes with the user session. Have included Apport output, though I had to select xorg from limited options in app and this is clearly technically incorrect (xorg session works fine). Have attached an exported log file of screen blanking causing the crash. Blanking probably starts at about the 16:04:22 entry, and the actual crash seems to happen at 16:04:35. ... 16:04:35 gnome-session-b: WARNING: Application 'org.gnome.Shell.desktop' killed by signal 6 16:04:35 gnome-shell: Fatal server error: 16:04:35 update-notifier: Error reading events from display: Broken pipe 16:04:35 gnome-shell: mutter:ERROR:backends/meta-monitor-manager.c:2267:meta_monitor_manager_get_logical_monitor_from_number: assertion failed: ((unsigned int) number < g_list_length (manager->logical_monitors)) 16:04:28 gnome-software: no app for changed ubuntu-appindicat...@ubuntu.com 16:04:22 gnome-shell: Some code accessed the property 'Client' on the module 'dbusMenu'. That property was defined with 'let' or 'const' inside the module. This was previously supported, but is not correct according to the ES6 standard. Any symbols to be exported from a module must be defined with 'var'. The property access will work as previously for the time being, but please fix your code anyway. ... Crash of gnome-shell can be avoided by changing "Settings - Power - Power Savings - Blank screen" to "never", and never attempting to lock the desktop. Alternatively logging in to a Xorg session seems to avoid crashes. Bug may be related to https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1721577 but circumstances leading to crash are completely different. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: xorg 1:7.7+19ubuntu2 ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3 Uname: Linux 4.13.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu2 Architecture: amd64 CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Mon Oct 9 17:47:51 2017 DistUpgraded: Fresh install DistroCodename: artful DistroVariant: ubuntu ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: NVIDIA Corporation GK208 [GeForce GT 730] [10de:1287] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. GK208 [GeForce GT 730] [1043:84f5] InstallationDate: Installed on 2017-10-08 (0 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926) MachineType: PINNACLE MICRO PROLINE DQ57TM ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-12-generic.efi.signed root=UUID=805df197-93bb-4468-8ac9-c1611d91bbbf ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display Title: Xorg crash UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/07/2011 dmi.bios.vendor: Intel Corp. dmi.bios.version: TMIBX10H.86A.0050.2011.1207.1134 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: DQ57TM dmi.board.vendor: Intel Corporation dmi.board.version: AAE70931-402 dmi.chassis.type: 3 dmi.chassis.version: UATX dmi.modalias: dmi:bvnIntelCorp.:bvrTMIBX10H.86A.0050.2011.1207.1134:bd12/07/2011:svnPINNACLEMICRO:pnPROLINEDQ57TM:pvr:rvnIntelCorporation:rnDQ57TM:rvrAAE70931-402:cvn:ct3:cvrUATX: dmi.product.name: PROLINE DQ57TM dmi.sys.vendor: PINNACLE MICRO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.83-1 version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.2-0ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.2-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.3-1ubuntu7 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20170309-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 ** Affects: mutter (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug artful crash ubuntu wayland-session ** Attachment added: "log of gnome-shell crash at approx 16:04:35" https://bugs.launchpad.net/bugs/1722353/+attachment/4966096/+files/log%20messages -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1722353 Title: Screen blanking and/or screen lock crashes gnome-shell user session on wayland - Ubuntu 17.10 beta To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1722353/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
