From mboxrd@z Thu Jan  1 00:00:00 1970
From: "pelzflorian (Florian Pelz)" <pelzflorian@pelzflorian.de>
Subject: Re: KMScon vs. AMD Radeon
Date: Mon, 22 Apr 2019 20:34:34 +0200
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To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: guix-devel@gnu.org

On Mon, Apr 22, 2019 at 01:48:52PM +0200, pelzflorian (Florian Pelz) wrot=
e:
> As before, when I do not specify modprobe.blacklist=3Dradeon, the
> display gets stuck with
>=20
> [   8.679377] fb0: switching to radeondrmfb from EFI VGA
>=20
> Before, I could add modprobe.blacklist=3Dradeon to boot to a console.
>=20

When I boot the Debian 9.8.0 live ISO, I get a working fbdev with
these messages in /var/log/Xorg.0.log

[    11.795] (**) FBDEV(2): claimed PCI slot 1@0:0:0
[=E2=80=A6]
[    11.795] (II) FBDEV(0): hardware: EFI VGA (video memory: 1984kB)

These messages are missing on Guix (instead, I get
[    45.884] (EE) Screen 0 deleted because of no matching config section.
where Debian has successfully found a screen.


Before these messages, I see on Guix:

[    43.781] (--) PCI:*(1@0:0:0) 1002:6613:1043:0541 rev 0, Mem @ 0xe0000=
000/268435456, 0xf7e00000/262144, I/O @ 0x0000e000/256, BIOS @ 0x????????=
/131072

On Debian, I see:

[    11.702] (--) PCI:*(0:1:0:0) 1002:6613:1043:0541 rev 0, Mem @ 0xe0000=
000/268435456, 0xf7e00000/262144, I/O @ 0x0000e000/256, BIOS @ 0x????????=
/131072


I wonder, where does this difference in the PCI message come from?