Where to add kernel parameter?

[concatenate]

Hi.
My laptop requires the kernel parameter i915.enable\_psr=0, otherwise my screen will flicker.
This normally should be added to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.

But in this file there is no DEFAULT line but two GRUB_CMDLINE_LINUX entries.
I’ve tried adding the parameter to this line and run sudo grub2-mkconfig -o /boot/grub2/grub.cfg\ but it didn’t work after reboot.

Where am I supposed to add this parameter in Qubes?
here is described the same solution but for me it doesn’t work…

Manually adding the parameter while booting (Pressing e in GRUB) does work.

[tzwcfq]

If you use EFI then you need to run this command:
sudo grub2-mkconfig -o /boot/efi/EFI/qubes/grub.cfg

[enmus]

The answer is in the next post

How to add custom kernel options in v4.1?

/etc/default/grub GRUB_CMDLINE_LINUX="…quiet i915.enable_psr=0" then, as @bungali pointed out you can rebuild

[enmus]

And if that doesn’t work then do this

Screen flickering in Qubes 4.1 on Tuxedo InfinityBook Pro 14 Gen6

Ok, the parameter is available. You may now wait 51lieal for further tips, or you can meanwhie try to set in /etc/modprobe.d/i915.conf : /etc/modprobe.d/i915.conf options i915 enable_psr=0 to regenerate initramf with something like sudo dracut --regenerate /boot/initramfs-5.x.x.fc32.qubes.x86_64.img --force where the x is your current kernel (uname -a) and to reboot it. I’m basically copy/pasting what is already there, and am not sure if it’s help, but rather what I’d do if I were you: …

And then rebuild initd:
sudo dracut /boot/initramfs-5.x.x.fc32.qubes.x86_64.img --force