Daniel I am debugging a similar issue on vmwgfx with software rendering and seeing the following. I think your theory about mastership may be vaild as I am seeing an EACCESS before switching to Xorg.
Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: Assigning buffer to primary plane update on CRTC (43) with src rect 0.000000,0.000000 1904.000000x929.000000 and dst rect 0,0 1904x929 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: Posting primary plane composite update for CRTC 43 (/dev/dri/card0) Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Processing update Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Assigning cursor plane (37, /dev/dri/card0) to 110, 64x64+0+0 -> 64x64+885+607 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'FB_ID' (17) to 110 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'CRTC_ID' (20) to 43 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'SRC_X' (9) to 0.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'SRC_Y' (10) to 0.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'SRC_W' (11) to 64.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'SRC_H' (12) to 64.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'CRTC_X' (13) to 885 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'CRTC_Y' (14) to 607 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'CRTC_W' (15) to 64 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'CRTC_H' (16) to 64 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'HOTSPOT_X' (38) to 4 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 37 (/dev/dri/card0) property 'HOTSPOT_Y' (39) to 4 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Assigning primary plane (35, /dev/dri/card0) to 109, 1904x929+0+0 -> 1904x929+0+0 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'FB_ID' (17) to 109 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'CRTC_ID' (20) to 43 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'SRC_X' (9) to 0.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'SRC_Y' (10) to 0.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'SRC_W' (11) to 1904.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'SRC_H' (12) to 929.00 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'CRTC_X' (13) to 0 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'CRTC_Y' (14) to 0 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'CRTC_W' (15) to 1904 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Setting plane 35 (/dev/dri/card0) property 'CRTC_H' (16) to 929 Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] Committing update flags: ATOMIC_NONBLOCK|PAGE_FLIP_EVENT Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: KMS: [atomic] KMS update failed: drmModeAtomicCommit: Permission denied Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: BACKEND: Releasing device file '/dev/input/event0' Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: BACKEND: Releasing control of and closing device file '/dev/input/event0' Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: BACKEND: Releasing device file '/dev/input/event3' Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: BACKEND: Releasing control of and closing device file '/dev/input/event3' Apr 17 11:33:17 ubuntu2410 gnome-shell[1776]: BACKEND: Releasing device file '/dev/dri/card0' Apr 17 11:33:18 ubuntu2410 gnome-shell[2748]: Running GNOME Shell (using mutter 47.0) as a X11 window and compositing manager The display comes back at the lock screen after the sleep timeout with the message Apr 17 12:09:03 ubuntu2410 gnome-shell[6410]: [WINSYS] ../cogl/cogl/winsys/cogl-onscreen-glx.c:282: MakeContextCurrent dpy: 0x62512e9666f0, window: 0x200009, context: 0x62512e9ef950 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/2089709 Title: Ubuntu 24.04 sometimes logs in to a black screen if the mouse is moved during login Status in gnome-shell package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Confirmed Bug description: I recently upgraded from Ubuntu 22.04 to Ubuntu 24.04. Now whenever I log in, sometimes I'll get a blank screen. It will only show the mouse cursor as an X. The problem seems to be intermittent. So far it's only happened to me using X11. My current workaround: 1. Open another terminal (e.g. Ctrl+Alt+F6) 2. Restart gdm3 (sudo systemctl restart gdm3) This seems to be affecting many people, although I couldn't find an existing bug: https://askubuntu.com/questions/1514757/issue-with- ubuntu-24-04-black-screen-with-cursor-on-login $ lsb_release -rd No LSB modules are available. Description: Ubuntu 24.04.1 LTS Release: 24.04 $ apt-cache policy gdm3 gdm3: Installed: 46.0-2ubuntu1 Candidate: 46.0-2ubuntu1 Version table: *** 46.0-2ubuntu1 500 500 http://ca.archive.ubuntu.com/ubuntu noble/main amd64 Packages 100 /var/lib/dpkg/status ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: gdm3 46.0-2ubuntu1 ProcVersionSignature: Ubuntu 6.8.0-48.48-generic 6.8.12 Uname: Linux 6.8.0-48-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Tue Nov 26 14:54:33 2024 InstallationDate: Installed on 2020-04-24 (1677 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: gdm3 UpgradeStatus: Upgraded to noble on 2024-11-15 (11 days ago) modified.conffile..etc.default.apport: [modified] modified.conffile..etc.init.d.apport: [modified] mtime.conffile..etc.default.apport: 2020-05-04T10:55:44.853443 mtime.conffile..etc.gdm3.custom.conf: 2022-09-08T08:54:17.642371 mtime.conffile..etc.init.d.apport: 2024-07-22T10:59:07 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2089709/+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

