Blank screen or vertical stripes instead of login screen on boot
I recently updated my computer from Debian 11 ("Bullseye") to 12 ("Bookworm"). This included an change of kernel version. Ever since, when booting normally (e.g. without altering the boot commands in Grub) into the "new" kernel I either get vertical striping or an empty greenish or pinkish off-white screen. Also, the keyboard becomes unresponsive. (Fortunately pressing the power button on the front of the machine is still interpreted as a request for a controlled shutdown.)
This happens should I connect the screen via HDMI or VGA. I lack DVI and DisplayPort cables, so am unable to test those outputs at this time.
Known working kernel:
- 5.10.0-26-rt-amd64 (the latest kernel available from Bullseye's repos, left over from the upgrade and not uninstalled yet)
-
uname -a
:Linux delta 5.10.0-26-rt-amd64 #1 SMP PREEMPT_RT Debian 5.10.197-1 (2023-09-29) x86_64 GNU/Linux
-
Known not-working kernels:
- 6.1.0-10-rt-amd64 (the oldest kernel available from Bookworm's repos)
- 6.1.0-13-rt-amd64 (the latest kernel available from Bookworm's repos)
-
uname -a
:Linux delta 6.1.0-13-rt-amd64 #1 SMP PREEMPT_RT Debian 6.1.55-1 (2023-09-29) x86_64 GNU/Linux
-
- 6.5.0-0.deb12.1-rt-amd64 (the latest kernel available from Bookworm-backport's repos)
-
uname -a
:Linux delta 6.5.0-0.deb12.1-rt-amd64 #1 SMP PREEMPT_RT Debian 6.5.3-1~bpo12+1 (2023-10-08) x86_64 GNU/Linux
-
Output of journalctl with dmesg included (both with monitor plugged into HDMI output):
Output of xrandr --verbose
Output of lspci -vnn -d :*:0300
Output of dmidecode
It is possible to get round the problem - for now - by booting the system and passing either single
or nomodeset
to the boot line in Grub. (It's how I was able to get the files above.) Or, alternatively, by booting into the older 5.10.0 kernel.