Arch Linux

turbochamp

Member

Registered: 2021-11-05

Posts: 23

GRUB really slow at 4K resolution

I know this isn't Arch related, and it's kinda trivial but maybe someone has an idea.

When setting the resolution in /etc/default/grub, and reconfiguring it all works. But it's extremely slow/laggy.

I'm on a 5950x and 3070 ti.

What I don't understand is my laptop (1050 ti mobile) can achieve grub at 4k with no lag and is perfectly fine. My desktop specs are leaps above that so I'm a little confused.

Any ideas?

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,169

Re: GRUB really slow at 4K resolution

https://wiki.archlinux.org/title/GRUB/T … resolution

The laptop will either run grub at a lower resolution (being a TUI thats gonna be hard to tell) or has the driver has better (framebuffer) support for the (older) GPU.

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turbochamp

Member

Registered: 2021-11-05

Posts: 23

Re: GRUB really slow at 4K resolution

https://wiki.archlinux.org/title/GRUB/T … resolution

The laptop will either run grub at a lower resolution (being a TUI thats gonna be hard to tell) or has the driver has better (framebuffer) support for the (older) GPU.

Yeah that's exactly what I did. Both using the same driver and the laptop was definitely using 4K resolution without lag.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,299

Re: GRUB really slow at 4K resolution

Laptop UEFIs are much more likely to set a proper framebuffer size/driver than desktop UEFIs from what I've seen.

Something that might help, is CSM/BIOS mode support enabled? Explicitly disabling that can also help here since support for legacy features can be dropped.

Last edited by V1del (2021-12-20 15:03:34)

turbochamp

Member

Registered: 2021-11-05

Posts: 23

Re: GRUB really slow at 4K resolution

Laptop UEFIs are much more likely to set a proper framebuffer size/driver than desktop UEFIs from what I've seen.

Something that might help, is CSM/BIOS mode support enabled? Explicitly disabling that can also help here since support for legacy features can be dropped.

Yeah I've disabled CSM in the bios. if it can't be solved it's alright, it'd just be nice really.