xrandr only finds one provider

[Andriy Samsonyuk]

Hi,

autoconfig does not work. X tryes to configure default screen (eDP-1)
with the amd card and fails. You can see from Xorg.0.log that
both GPUs get eDP-1 as an output, but it seems only to work with intel.

Regards
Andriy

On Mon, Mar 25, 2019 at 12:09:39PM +0100, Michel Dänzer wrote:
> On 2019-03-22 4:04 p.m., Andriy Samsonyuk wrote:
> > Hi,
> > 
> > i am having a weird xorg behavior i don't understand.
> > Any help will be appreciated.
> > 
> > i am running freebsd-12
> > xorg-server-1.18.4_11,1
> > xrandr-1.5.0
> > 
> > on dell precision 7530
> > This laptop has 2 GPUs:
> > ***
> > lspci -nn | grep -i vga
> > 00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:3e94]
> > 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Baffin [Radeon Pro WX 4130/4150] [1002:67e8]
> > ***
> > 
> > Installed are:
> > xf86-video-intel-2.99.917.20181203
> > xf86-video-amdgpu-18.1.0
> > drm-fbsd12.0-kmod-4.16.g20190305 (amdgpu, i915, and radeon DRM modules for the linuxkpi-based KMS components. Currently corresponding to Linux 4.16 DRM.)
> > 
> > amdgpu is working fine with external screens and intel with internal,
> > but i cannot get them working together.
> > 
> > in xorg.conf i can specify:
> > Section "ServerLayout"
> > 	Screen      0  "External"
> > 	Screen      1  "Primary" LeftOf "External"
> > 
> > or
> > Section "ServerLayout"
> >   Screen      0  "Primary" 0 0
> >   Screen      1  "External" RightOf "Primary"
> > 
> > in each case only one provider is recognized by xrandr (amdgpu in the first case and intel in second)
> > and i can access another screen via f.e.
> > DISPLAY=:0.1 urxvt &
> 
> This is because your xorg.conf sets up both GPUs as primary screens
> (so-called "traditional multihead", as this was the first kind of
> multi-GPU configuration supported by X).
> 
> In order to use the second GPU as an RandR provider, you need to leave
> it unconfigured in xorg.conf, then Xorg should automatically set it up
> as a so-called "GPU" screen.
> 
> 
> -- 
> Earthling Michel Dänzer               |              https://www.amd.com
> Libre software enthusiast             |             Mesa and X developer
> 
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