Re: arandr/xrandr only dectecting 1 of 2 amdgpu(4) video cards

On Mon, Oct 28, 2024 at 06:51:19PM +0100, Alexis de BRUYN [Mailing Lists] wrote:
> Hello Everybody,
>
> On a system running -current with 2 video cards, I want to use arandr to configure grafically at least 10 monitors and because the "Option Rotate" settings in xorg.conf is not working.
>
> [ 25.614] (--) PCI:*(3@0:0:0) 1002:7312:1002:031e rev 0, Mem @ 0xa0000000/268435456, 0xb0000000/2097152, 0xb5800000/524288, I/O @ 0x00007000/256
> [ 25.614] (--) PCI: (12@0:0:0) 1002:7312:1002:031e rev 0, Mem @ 0x80000000/268435456, 0x90000000/2097152, 0xb5500000/524288, I/O @ 0x00004000/256
>
> $ cat /etc/X11/xorg.conf.d/20-amdgpu.conf
> Section "Device"
> Identifier "Card3"
> Driver "amdgpu"
> BusID "PCI:3:0:0"
> EndSection
>
> Section "Device"
> Identifier "Card12"
> Driver "amdgpu"
> BusID "PCI:12:0:0"
> EndSection
>
> In menu "Outputs" menu of arandr, only 6 DisplayPort are shown.
>
> $ xrandr --listproviders
> Providers: number : 1
> Provider 0: id: 0x5a cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 6 outputs: 6 associated providers: 0 name:AMD Radeon Pro W5700 @ pci:0000:03:00.0
>
> I have tested the same setup with an Ubuntu live CD, and 12 DP were recognized.
>
> Thanks for your help.
>
> $ cat /var/log/Xorg.0.log
...
> [ 21.354] (II) AMDGPU(0): [KMS] Kernel modesetting enabled.
> [ 21.476] (II) AMDGPU(1): [KMS] Kernel modesetting enabled.

but

> [ 21.543] (EE) Screen 1 deleted because of no matching config section.

and then

> [ 21.575] (II) UnloadModule: "amdgpu"

I'm guessing, and someone more knowledgeable might correct me, but I'd
say you probably can't get away with the default configuration, and need
to explicitly configure the Screens for those two Devices.

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