u/Bug8912

Hello fam,

So i setup this new to me T14 with dm-crypt, I use Plymouth to have a nice looking password prompt but for some reason the backlight goes to 0 when Plymouth appears. After the disk is mounted and the read boot start, the brightness is restored as it should.

So I guess there is an issue in the initramfs but I tried to add a systemd service to start before plymouth but obviously /sys/class/backlight/amdgpu_bl1 is not available... I tried to add amdgpu to my mkinitcpio.conf modules but it nothing changes.

Any idea of what is wrong ?

Thank you

edit:
I found a fix !
I simply had to add a udev rule to change the backlight as soon as the GPU is available.

/etc/udev/rules.d/99-backlight-initrd.rules

ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="amdgpu_bl1", RUN+="/bin/sh -c 'echo 62451 > /sys/class/backlight/amdgpu_bl1/brightness'"

Hello fam,

So I have a perfectly functional Arch system with full root encryption and TPM + password or a passphrase if TPM is failing. All with secure boot and UKI so I guess I'm "pretty safe" (secure boot can't be disable without a password in the bios oc).

I spent a whole day trying to replicate this to Gentoo without using systemd... I managed to have luks working with signed (non uki) Kernel modules but couldn't go any further. Afaik Clevis doesn't provide a way to have TPM+password and uki is mostly a systemd thing.

So the only solution would be to let systemd do it's thing for key enrolling and stuff as well as for UKI but keep openrc as an init system.

It seems a bit weird to mix systemd with an openrc system don't you think so ?

I really wish systemd was not as much everywhere.

TLDR: Trying to have luks with TPM+password and secure boot while minimizing systemd.