Public bug reported: Hello
There are no operational issues with version 24.04. The problem occurs when attempting to install version 26.04. The installer gets stuck in a loop when opening the installer's graphical session, despite the presence of the NOMODESET option. Here are some collected logs. root@b:/media/a/writable/install-logs-2025-11-29.0/log# head dmesg [ 37.249870] kernel: Linux version 6.17.0-5-generic (buildd@lcy02-amd64-035) (x86_64-linux-gnu-gcc (Ubuntu 15.2.0-4ubuntu2) 15.2.0, GNU ld (GNU Binutils for Ubuntu) 2.45) #5-Ubuntu SMP PREEMPT_DYNAMIC Mon Sep 22 10:00:33 UTC 2025 (Ubuntu 6.17.0-5.5-generic 6.17.0-rc7) [ 37.249989] kernel: Command line: BOOT_IMAGE=/casper/vmlinuz nomodeset --- quiet splash [ 37.251135] kernel: KERNEL supported cpus: [ 37.251194] kernel: Intel GenuineIntel [ 37.251237] kernel: AMD AuthenticAMD [ 37.251280] kernel: Hygon HygonGenuine [ 37.251353] kernel: Centaur CentaurHauls [ 37.251398] kernel: zhaoxin Shanghai [ 37.251443] kernel: BIOS-provided physical RAM map: [ 37.251489] kernel: BIOS-e820: [mem 0x0000000000000000-0x00000000000977ff] usable root@b:/media/a/writable/install-logs-2025-11-29.0/log# grep "Started session-c" syslog 2025-11-29T11:03:14.270747+00:00 ubuntu systemd[1]: Started session-c1.scope - Session c1 of User gdm-greeter. 2025-11-29T11:03:59.938616+00:00 ubuntu systemd[1]: Started session-c2.scope - Session c2 of User gdm-greeter. 2025-11-29T11:04:37.406300+00:00 ubuntu systemd[1]: Started session-c3.scope - Session c3 of User gdm-greeter. 2025-11-29T11:05:28.698318+00:00 ubuntu systemd[1]: Started session-c4.scope - Session c4 of User gdm-greeter. 2025-11-29T11:05:54.570332+00:00 ubuntu systemd[1]: Started session-c5.scope - Session c5 of User gdm-greeter. 2025-11-29T11:08:30.805128+00:00 ubuntu systemd[1]: Started session-c6.scope - Session c6 of User gdm-greeter. 2025-11-29T11:13:17.794394+00:00 ubuntu systemd[1]: Started session-c7.scope - Session c7 of User gdm-greeter. EXTRACT of syslog 2025-11-29T11:16:08.263371+00:00 ubuntu systemd[17377]: Started [email protected] - GNOME Session Manager (session: ubuntu). 2025-11-29T11:16:08.265155+00:00 ubuntu systemd[17377]: Reached target gnome-session-manager.target - GNOME Session Manager is ready. 2025-11-29T11:16:08.267212+00:00 ubuntu snapd-desktop-i[42206]: Loop exited. Forcing reload. 2025-11-29T11:16:08.271902+00:00 ubuntu systemd[17377]: Starting [email protected] - GNOME Shell on Wayland... 2025-11-29T11:16:08.292021+00:00 ubuntu systemd[17377]: snap.snapd-desktop-integration.snapd-desktop-integration.service: Consumed 1.841s CPU time, 15.8M memory peak. 2025-11-29T11:16:09.314062+00:00 ubuntu gnome-shell[42217]: Running GNOME Shell (using mutter 49.0) as a Wayland display server 2025-11-29T11:16:09.336295+00:00 ubuntu gnome-shell[42217]: Enabling experimental feature 'scale-monitor-framebuffer' 2025-11-29T11:16:09.336785+00:00 ubuntu gnome-shell[42217]: Enabling experimental feature 'xwayland-native-scaling' 2025-11-29T11:16:10.163309+00:00 ubuntu rtkit-daemon[2682]: Supervising 2 threads of 1 processes of 1 users. 2025-11-29T11:16:10.178189+00:00 ubuntu rtkit-daemon[2682]: Successfully made thread 42229 of process 42217 owned by '1000' high priority at nice level -15. 2025-11-29T11:16:10.178483+00:00 ubuntu rtkit-daemon[2682]: Supervising 3 threads of 2 processes of 1 users. 2025-11-29T11:16:10.179091+00:00 ubuntu gnome-shell[42217]: Thread 'KMS thread' will be using high priority scheduling 2025-11-29T11:16:10.190180+00:00 ubuntu gnome-shell[42217]: Failed to setup: No GPUs found 2025-11-29T11:16:10.263431+00:00 ubuntu systemd[17377]: [email protected]: Failed with result 'protocol'. 2025-11-29T11:16:10.265365+00:00 ubuntu systemd[17377]: Failed to start [email protected] - GNOME Shell on Wayland. 2025-11-29T11:16:10.265613+00:00 ubuntu systemd[17377]: [email protected]: Consumed 1.883s CPU time, 27.1M memory peak. 2025-11-29T11:16:10.265806+00:00 ubuntu systemd[17377]: [email protected]: Triggering OnFailure= dependencies. 2025-11-29T11:16:10.267714+00:00 ubuntu systemd[17377]: Stopping gvfs-daemon.service - Virtual filesystem service... ....... and all the stopping..... For information, in 24.04 a@b:~$ echo $XDG_SESSION_TYPE wayland a@b:~$ journalctl --no-pager -b -p notice | grep GPU nov. 29 12:19:26 b gnome-shell[2077]: Failed to initialize accelerated iGPU/dGPU framebuffer sharing: KMS CRTC doesn't support GBM format nov. 29 12:19:26 b gnome-shell[2077]: Boot VGA GPU /dev/dri/card0 selected as primary nov. 29 12:19:55 b gnome-shell[2941]: Failed to initialize accelerated iGPU/dGPU framebuffer sharing: KMS CRTC doesn't support GBM format nov. 29 12:19:55 b gnome-shell[2941]: Boot VGA GPU /dev/dri/card0 selected as primary a@b:~$ There's probably an option to add to GRUB to inform the software of the absence of a graphics card, but I haven't found it. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: gdm3 46.2-1ubuntu1~24.04.4 ProcVersionSignature: Ubuntu 6.8.0-88.89-generic 6.8.12 Uname: Linux 6.8.0-88-generic x86_64 NonfreeKernelModules: zfs ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Nov 29 13:43:46 2025 InstallationDate: Installed on 2024-09-18 (437 days ago) InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240220) ProcEnviron: LANG=fr_FR.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: gdm3 UpgradeStatus: Upgraded to noble on 2024-09-18 (437 days ago) ** Affects: gdm3 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble wayland-session -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2133418 Title: Failed to setup: No GPUs found To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2133418/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
