Arch Linux

Enrico1989

Member

Registered: 2018-07-05

Posts: 359

[SOLVED] Can't boot

I've just tried to reboot Arch and the screen has been showing variations of these for several minutes...

A screenshot should be visible at https://photos.app.goo.gl/kZ5f9RgMzwTMHvn59

Another one is at https://photos.app.goo.gl/tzGvbn2KfrNQWa9K6

What's happening? :'(

It seems to me that an endless loop is happening, but I'm afraid I could break everything if I try to manually power off via the power button...

(I don't have another system at hand, so I can only interact from my phone, sorry)

Last edited by Enrico1989 (2024-02-18 11:14:19)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,231

Re: [SOLVED] Can't boot

There are known problems on reboot on amdgpus with a 7xxx generation card, incidentally fixed by 6.7.5 -- if you are in that situation and not on 6.7.5 yet this is "normal" (though not with a CPU error like you're seeing....

You're not going to be able to do much here if you don't have REISUB enabled, do a shutdown, check the potential damage after. Assuming this happens in the bootup phase of the reboot chances are nothing of not is currently running. FWIW if you can, the actual crashing reason is cut off in these outputs, but chances are this just eeks out the visible portion of the screen and since scrollback got removed from the TTY you can't scroll up trivially.

Last edited by V1del (2024-02-18 10:25:19)

Enrico1989

Member

Registered: 2018-07-05

Posts: 359

Re: [SOLVED] Can't boot

So what should I do? I've read what the acronym REISUB is, bit I don't understand what to do...

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,231

Re: [SOLVED] Can't boot

If it's not already enabled and you're literally looking at a bootloop. Kill the system with the power button, check whether you can boot after. If you invoked a reboot chances are some firmware was left in a wonky state that now trips things up.

Enrico1989

Member

Registered: 2018-07-05

Posts: 359

Re: [SOLVED] Can't boot

Kill the system with the power button, check whether you can boot after.

Uhhhhhh, that worked.

Those screens were scary and I didn't want to try powering off without anybody at least reassuring me that it was not an "100% you're gonna break something"

Thanks!

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,231

Re: [SOLVED] Can't boot

Now for generally preventive/safer measures enable the aforementioned REISUB: https://wiki.archlinux.org/title/Keyboa … el_(SysRq) -- if your system runs into such states chances are you can at least more safely reboot if you have that enabled.

Also if you're dual booting, make sure Windows fast boot is disabled: https://wiki.archlinux.org/title/Dual_b … ibernation

General speculation on the bits and pieces of the error we saw, there was an issue in the CPU numa code, that could actually be a kernel bug, but generally make sure your CPU microcodes are loaded: https://wiki.archlinux.org/title/Microcode