Public bug reported:
Title: Black screen during boot only when Plymouth splash is enabled
Distribution: Linux Mint 22.3, upgraded from Linux Mint 21.3 via 22.0
Base: Ubuntu 24.04 / Noble
Affected package suspected: plymouth
GPU: AMD Barts XT / Radeon HD 68xx, using kernel radeon driver
Display server: X11
Kernel(s) tested: 6.8.0-134-generic, 6.17 HWE; issue reproduced on installed
system
Summary:
The installed system boots successfully, but the display becomes
permanently black when the kernel command line contains `splash`, which
starts Plymouth. The system is not frozen: I can switch to TTY3, log in
blindly, and reboot blindly. Removing only `splash` from the kernel
command line makes the system boot visibly and reliably.
Reproduction matrix:
* `quiet splash` → black screen
* `quiet` → boots visibly
* no `quiet`, no `splash` → boots visibly
* `quiet splash radeon.dpm=0` → black screen
* `radeon.dpm=0` without `splash` → boots visibly
Expected behavior:
With `quiet splash`, Plymouth should show the boot splash or cleanly
hand off to console/display manager. The screen should not remain black
while the OS continues running.
Actual behavior:
With `quiet splash`, the display goes black during boot and stays black.
The machine still reaches a login-capable state. Blind TTY login works
and `sudo reboot` works.
Why I suspect Plymouth:
The deciding variable is `splash`, not `radeon.dpm=0`. Adding
`radeon.dpm=0` does not help if `splash` remains present. Removing
`splash` fixes the issue. This suggests a Plymouth / DRM-KMS /
framebuffer handoff issue rather than a general kernel boot failure,
filesystem issue, package issue, or desktop-session failure.
Workaround:
Remove `splash` from `/etc/default/grub`, then run `sudo update-grub`.
Attachments included:
* system-info.txt
* working-kernel.log
* working-kernel-full.log
* failed-kernel.log
* failed-kernel-full.log
* plymouth-debug-failed.log
** Affects: plymouth (Ubuntu)
Importance: Undecided
Status: New
** Tags: splash
** Attachment added: "This file contains all the logs I could gather"
https://bugs.launchpad.net/bugs/2159603/+attachment/5980345/+files/plymouth-blackscreen-bugreport.tar.gz
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https://bugs.launchpad.net/bugs/2159603
Title:
Black screen during boot only when Plymouth splash is enabled
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