Public bug reported: Expect to happen: I can use X11VNC when the monitor is disconnected.
What happens instead: remote X11vnc session unusable due to crash in gnome-shell when disconnecting HDMI monitor under Ubuntu Desktop 18.04 LTS I'm using a stable system that works fine when the monitor is connected; also X11VNC works fine. But I want to access the GUI remotely via X11VNC when the HDMI monitor is disconnected then the system is not usable (lots of gnome-shell errors in syslog) and sometimes the gnome-shell will also segfault (the segfault is not in this bugreport). The X11 remote viewer is full of clutter (see screencast). Please see below for the syslog entries when disconnecting the monitor with no X11VNC active, and the syslog entries when the monitor is disconnected and starting X11VNC. Gist: https://gist.github.com/pantaluna/c4f69f367611c596d10919f3c80e1a0d X. VIDEO: X11VNC monitor disconnected. https://www.dropbox.com/s/a8jjnw14uhtibzk/ubuntu1804-x11vnc-disconnected-monitor-fatal.mp4?dl=0 X. System https://gist.github.com/pantaluna/c4f69f367611c596d10919f3c80e1a0d - Ubuntu Desktop 18.04 LTS (latest updates until Jul19,2018 14:00h). - Intel HD Graphics 530 $ lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 $ root@s3black:~# apt-cache policy gnome-shell gnome-shell: Installed: 3.28.2-0ubuntu0.18.04.1 Candidate: 3.28.2-0ubuntu0.18.04.1 Version table: *** 3.28.2-0ubuntu0.18.04.1 500 500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.28.1-0ubuntu2 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages $ lspci -nnk | grep -i -A3 "vga" | grep 'in use' Kernel driver in use: i915 $ lshw -C video *-display description: VGA compatible controller product: HD Graphics 530 vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 06 width: 64 bits clock: 33MHz capabilities: pciexpress msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:127 memory:de000000-deffffff memory:c0000000-cfffffff ioport:f000(size=64) memory:c0000-dffff X. GIST: Syslog entries when disconnecting the HDMI cable. egrep --ignore-case "gnome|hdmi" /var/log/syslog Jul 19 14:37:53 s3black kernel: [ 943.153341] i915 0000:00:02.0: HDMI-A-1: EDID is invalid: Jul 19 14:37:53 s3black kernel: [ 943.153347] [00] BAD 00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153349] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153351] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153353] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153354] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153356] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153358] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:53 s3black kernel: [ 943.153360] [00] BAD ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Jul 19 14:37:55 s3black gnome-shell[2017]: JS WARNING: [resource:///org/gnome/shell/ui/workspaceThumbnail.js 903]: reference to undefined property "_switchWorkspaceNotifyId" Jul 19 14:37:56 s3black gnome-shell[2017]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed Jul 19 14:37:56 s3black gnome-shell[2017]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed Jul 19 14:37:56 s3black gnome-shell[2017]: JS ERROR: TypeError: this._monitor is undefined#012DockedDash<._resetPosition@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1089:17#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockedDash<._init@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:416:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_Base.prototype._construct@resource:///org/gnome/gjs/modules/_legacy.js:18:5#012Class.prototype._construct/newClass@resource:///org/gnome/gjs/modules/_legacy.js:114:32#012DockManager<._createDocks@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1717:20#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockManager<._toggle@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1663:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22 Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe2d6c30 StButton.app-well-app ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fbe39c40 StWidget:last-child first-child ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe2d6c30 StButton.app-well-app ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fbe39c40 StWidget:last-child first-child ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fd5fb440 StWidget.app-well-app-running-dot:first-child] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe2d6c30 StButton.app-well-app ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fbe39c40 StWidget:last-child first-child ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe522d50 StBin.overview-icon] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe2d6c30 StButton.app-well-app ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fbe39c40 StWidget:last-child first-child ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe522d50 StBin.overview-icon] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe520050 ShellGenericContainer:last-child first-child] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe2d6c30 StButton.app-well-app ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fbe39c40 StWidget:last-child first-child ("33")] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe522d50 StBin.overview-icon] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe520050 ShellGenericContainer:last-child first-child] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: st_widget_get_theme_node called on the widget [0x5650fe51cf50 StBin:last-child first-child] which is not in the stage. Jul 19 14:37:56 s3black gnome-shell[2017]: clutter-actor.c:10049: Actor 'dashtodockDashScrollview' tried to allocate a size of 66.00 x -64.00 Jul 19 14:37:56 s3black gnome-shell[2017]: clutter-actor.c:10049: Actor 'dashtodockDashScrollview' tried to allocate a size of 66.00 x -64.00 Jul 19 14:37:56 s3black gnome-shell[2017]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed Jul 19 14:37:56 s3black gnome-shell[2017]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed Jul 19 14:37:56 s3black gnome-shell[2017]: JS ERROR: TypeError: this._monitor is undefined#012DockedDash<._resetPosition@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1089:17#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22 Jul 19 14:37:56 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:37:56 s3black gnome-shell[2017]: message repeated 6 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:37:56 s3black gnome-shell[2017]: JS ERROR: TypeError: this._monitor is undefined#012DockedDash<._updateBarrier@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:963:1#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012DockedDash<._initialize@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:444:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22 Jul 19 14:37:56 s3black gnome-shell[2017]: clutter-actor.c:10049: Actor 'dashtodockDashScrollview' tried to allocate a size of 66.00 x -64.00 Jul 19 14:37:56 s3black gnome-shell[2017]: setup_framebuffers: assertion 'height > 0' failed Jul 19 14:37:56 s3black org.gnome.Shell.desktop[2017]: Window manager warning: Overwriting existing binding of keysym ff09 with keysym ff09 (keycode 17). Jul 19 14:37:56 s3black org.gnome.Shell.desktop[2017]: Window manager warning: Overwriting existing binding of keysym ff09 with keysym ff09 (keycode 17). Jul 19 14:37:56 s3black gnome-shell[2017]: clutter-actor.c:10049: Actor 'dashtodockDashScrollview' tried to allocate a size of 66.00 x -64.00 Jul 19 14:37:56 s3black gnome-shell[2017]: setup_framebuffers: assertion 'height > 0' failed Jul 19 14:37:56 s3black gnome-shell[2017]: message repeated 3 times: [ setup_framebuffers: assertion 'height > 0' failed] X. GIST: Syslog entries when opening a remote X11VNC session and doing some GUI interactions with the mouse (the mouse clicks on menu's do not work anymore). https://gist.github.com/pantaluna/c4f69f367611c596d10919f3c80e1a0d egrep --ignore-case "gnome|hdmi" /var/log/syslog Jul 19 14:44:31 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:33 s3black gnome-shell[2017]: message repeated 335 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:33 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:34 s3black gnome-shell[2017]: message repeated 167 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:35 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:35 s3black gnome-shell[2017]: message repeated 55 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:36 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:36 s3black gnome-shell[2017]: message repeated 83 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:36 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:39 s3black gnome-shell[2017]: message repeated 244 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:39 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:40 s3black gnome-shell[2017]: message repeated 111 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:41 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:43 s3black gnome-shell[2017]: message repeated 272 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:44 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:48 s3black gnome-shell[2017]: message repeated 321 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:49 s3black gnome-shell[2017]: meta_window_is_on_primary_monitor: assertion 'window->monitor' failed Jul 19 14:44:52 s3black gnome-shell[2017]: message repeated 580 times: [ meta_window_is_on_primary_monitor: assertion 'window->monitor' failed] Jul 19 14:44:53 s3black gnome-shell[2017]: meta_screen_get_monitor_geometry: assertion 'monitor >= 0 && monitor < n_logical_monitors' failed Jul 19 14:44:53 s3black gnome-shell[2017]: meta_screen_get_monitor_geometry: assertion 'monitor >= 0 && monitor < n_logical_monitors' failed Jul 19 14:44:53 s3black gnome-shell[2017]: JS ERROR: TypeError: monitor is null#012_reposition@resource:///org/gnome/shell/ui/boxpointer.js:508:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012setPosition@resource:///org/gnome/shell/ui/boxpointer.js:430:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012open@resource:///org/gnome/shell/ui/popupMenu.js:866:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012toggle@resource:///org/gnome/shell/ui/popupMenu.js:746:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_onEvent@resource:///org/gnome/shell/ui/panelMenu.js:138:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22 Jul 19 14:44:53 s3black gnome-shell[2017]: meta_screen_get_monitor_geometry: assertion 'monitor >= 0 && monitor < n_logical_monitors' failed Jul 19 14:44:55 s3black gnome-shell[2017]: meta_monitor_manager_get_logical_monitor_from_number: assertion '(unsigned int) number < g_list_length (manager->logical_monitors)' failed Jul 19 14:44:55 s3black gnome-shell[2017]: meta_workspace_get_work_area_for_monitor: assertion 'logical_monitor != NULL' failed Jul 19 14:44:55 s3black gnome-shell[2017]: clutter-actor.c:10049: Actor 'dashtodockDashScrollview' tried to allocate a size of 66.00 x -64.00 ** Affects: gnome-shell (Ubuntu) Importance: Undecided Status: New ** Tags: 18.04 monitor x11vnc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782573 Title: Remote X11vnc session unusable due to crash in gnome-shell when disconnecting HDMI monitor under Ubuntu Desktop 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1782573/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
