Thanks for your message, Pascal.
Responding in-line:
On Monday, June 30th, 2025 at 3:53 PM, Pascal Hambourg <pascal@plouf.fr.eu.org> wrote:
On 30/06/2025 at 23:30, Derald wrote:
on reboot, BIOS bug creates continual output stream while user tries to input passphrase for encrypted volume
Which BIOS bug ?
Here is a sample of the output I found using dmesg. The error messages continue while attempting to input the encryption password:
[12462.520326] ACPI BIOS Error (bug): Could not resolve symbol [^^^GFX0.AFN2], AE_NOT_FOUND (20220331/psargs-332)
[12462.520338] ACPI Error: Aborting method \_SB.PCI0.LPCB.H_EC._QC9 due to previous error (AE_NOT_FOUND) (20220331/psparse-529)
This error only occurred when installing using encrypted LVM.
I do not see why encrypted LVM would trigger a BIOS bug. Maybe you do
not see it without encryption because the system boots too quickly.
Looks like a simple configuration change solved the problem for me. I found a guide on the internet for how to change the boot splash settings on GRUB.
Which splash setting did you change ? Doesn't it just hide the error
message ? It may still be flooding your logs. If it is a kernel message,
you can check with dmesg.
This is the splash setting I have changed. I believe you are correct, that this simply conceals the error message to reduce the visual distraction:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"