From mboxrd@z Thu Jan  1 00:00:00 1970
From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Subject: Re: Screen does not wake up from suspend ("No signal") on a Radeon RX
	580
Date: Sat, 26 Jan 2019 15:09:55 -0500
Message-ID: <871s4zdvu4.fsf@gmail.com>
References: <87d0oj1z53.fsf@ambrevar.xyz>
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In-Reply-To: <87d0oj1z53.fsf@ambrevar.xyz> (Pierre Neidhardt's message of
	"Sat, 26 Jan 2019 11:39:20 +0100")
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To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: help-guix <help-guix@gnu.org>

Pierre Neidhardt <mail@ambrevar.xyz> writes:

> Hi!
>
> I've deployed Guix on a desktop computer with pretty much the exact same
> config as my laptop.
>
> On my laptop I can run
>
> $ loginctl suspend
>
> to hibernate.  Pressing a key will successfully wake it up.
>
> On my desktop, the same command sends the computer to sleep, but while
> pressing a key wakes it up (judging from the fans and the hard drive
> spinning up) the screen desperately remains off.  Turning it off and on
> again displays "No signal".
>
> In short, my desktop uses:
>
> - Linux-libre kernel, instead of a custom kernel for my laptop.
> - BIOS Grub because somehow Grub fails in EFI mode...  Whatever.
> - A Radeon RX 580 (which works perfectly so far) instead of an Intel for
> my laptop.
>
> My config.scm:
>
> - https://gitlab.com/ambrevar/dotfiles/raw/master/.guix-packages/ambrevar/system/default.scm
> - https://gitlab.com/ambrevar/dotfiles/raw/master/.guix-packages/ambrevar/system/desktop-bababa.scm
>
> Any pointer?

I don't know for sure, but that Radeon RX 580 card could be the
problem. I've set up a machine with Debian 9 and a Radeon R9 285 in the
past, and it was a pain to make it work -- it would not work at all
without the firmware blobs, and even then, I had to use a custom kernel
from AMD to get it working correctly...

If you have a 2nd (old nVidia would be the best) card laying around, I'd
suggest trying that -- if it works, you'll know the problem is with the
amggpu driver.

Good luck,

Maxim