Public bug reported:
I have noticed that my laptop gets stuck during the boot with a black screen
and a blinking underscore.
When I hold my power button for 5 seconds and boot again, everything works fine.
In the logs I have found errors mentioning my gpu and the failure of the gnome
shell, wayland and x11 to properly start. Condensed version:
❯ journalctl -b -1 --no-pager -o short-precise | grep -E "gnome-shell|Session
never registered|GdmDisplay|No GPUs found|gdm3.*Gdm:|GLib-GObject.*failed"
Apr 06 20:55:32.527498 thinpad gnome-shell[1526]: Running GNOME Shell (using
mutter 42.9) as a Wayland display server
Apr 06 20:55:32.589052 thinpad org.gnome.Shell.desktop[1526]: Failed to setup:
No GPUs found
Apr 06 20:55:32.602620 thinpad gdm-launch-environment][1123]: GLib-GObject:
g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Apr 06 20:55:32.602636 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.607877 thinpad gdm3[1099]: Gdm: Child process -1464 was already
dead.
Apr 06 20:55:32.607883 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.610622 thinpad gdm3[1099]: Gdm: Child process -1464 was already
dead.
Apr 06 20:55:32.731993 thinpad gdm-launch-environment][1564]: GLib-GObject:
g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Apr 06 20:55:32.731993 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.736027 thinpad gdm3[1099]: Gdm: Child process -1576 was already
dead.
Apr 06 20:55:32.736035 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.738656 thinpad gdm3[1099]: Gdm: Child process -1576 was already
dead.
Apr 06 20:55:32.859595 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.859606 thinpad gdm-launch-environment][1581]: GLib-GObject:
g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Apr 06 20:55:32.864552 thinpad gdm3[1099]: Gdm: Child process -1586 was already
dead.
Apr 06 20:55:32.864562 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.867554 thinpad gdm3[1099]: Gdm: Child process -1586 was already
dead.
Apr 06 20:55:32.985497 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.985550 thinpad gdm-launch-environment][1615]: GLib-GObject:
g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Apr 06 20:55:32.990249 thinpad gdm3[1099]: Gdm: Child process -1620 was already
dead.
Apr 06 20:55:32.990257 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:32.993334 thinpad gdm3[1099]: Gdm: Child process -1620 was already
dead.
Apr 06 20:55:33.101429 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:33.101438 thinpad gdm-launch-environment][1628]: GLib-GObject:
g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Apr 06 20:55:33.104924 thinpad gdm3[1099]: Gdm: Child process -1633 was already
dead.
Apr 06 20:55:33.104931 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:33.107446 thinpad gdm3[1099]: Gdm: Child process -1633 was already
dead.
Apr 06 20:55:33.218970 thinpad gdm-launch-environment][1654]: GLib-GObject:
g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Apr 06 20:55:33.218971 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:33.220449 thinpad gdm3[1099]: Gdm: GdmLocalDisplayFactory: maximum
number of X display failures reached: check X server log for errors
Apr 06 20:55:33.220536 thinpad gdm3[1099]: Gdm: Child process -1660 was already
dead.
Apr 06 20:55:33.220543 thinpad gdm3[1099]: Gdm: GdmDisplay: Session never
registered, failing
Apr 06 20:55:33.223100 thinpad gdm3[1099]: Gdm: Child process -1660 was already
dead.
❯ lsb_release -rd
Description: Ubuntu 22.04.5 LTS
Release: 22.04
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.8.0-107-generic 6.8.0-107.107~22.04.1
ProcVersionSignature: Ubuntu 6.8.0-107.107~22.04.1-generic 6.8.12
Uname: Linux 6.8.0-107-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.10
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jonas 3202 F.... pulseaudio
/dev/snd/controlC2: jonas 3202 F.... pulseaudio
/dev/snd/controlC0: jonas 3202 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 6 21:02:02 2026
InstallationDate: Installed on 2024-03-20 (747 days ago)
InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64
(20240220)
MachineType: LENOVO 21H6S00900
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-107-generic
root=UUID=6de66a5a-a580-4b77-944f-1b53f8e2d684 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-6.8.0-107-generic N/A
linux-backports-modules-6.8.0-107-generic N/A
linux-firmware 20220329.git681281e4-0ubuntu3.41
SourcePackage: linux-hwe-6.8
UpgradeStatus: Upgraded to jammy on 2025-01-03 (457 days ago)
dmi.bios.date: 01/19/2024
dmi.bios.release: 1.15
dmi.bios.vendor: LENOVO
dmi.bios.version: R25ET34W (1.15 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21H6S00900
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.7
dmi.modalias:
dmi:bvnLENOVO:bvrR25ET34W(1.15):bd01/19/2024:br1.15:efr1.7:svnLENOVO:pn21H6S00900:pvrThinkPadL14Gen4:rvnLENOVO:rn21H6S00900:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21H6_BU_Think_FM_ThinkPadL14Gen4:
dmi.product.family: ThinkPad L14 Gen 4
dmi.product.name: 21H6S00900
dmi.product.sku: LENOVO_MT_21H6_BU_Think_FM_ThinkPad L14 Gen 4
dmi.product.version: ThinkPad L14 Gen 4
dmi.sys.vendor: LENOVO
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy
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https://bugs.launchpad.net/bugs/2147368
Title:
boot hangs in black screen
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