Arch Linux

manuel_yao

Member

Registered: 2020-07-17

Posts: 8

Second monitor black screen

Hi, I installed Arch + Windows dual boot a couple days ago and everything seems to work fine except this.
I have a laptop with an AMD CPU with integrated graphics and an Nvidia discrete GPU. When I try to plug it to an external monitor through HDMI, it is detected but it only shows a black screen.
xrandr outputs:

Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 16384 x 16384
eDP connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1920x1080     60.00*+  40.00
   1680x1050     60.00
   1280x1024     60.00
   1440x900      60.00
   1280x800      60.00
   1280x720      60.00
   1024x768      60.00
   800x600       60.00
   640x480       60.00
HDMI-1-0 connected 2560x1440+0+0 526mm x 296mm
   2560x1440     59.95*+
   2048x1080     60.00    24.00
   1920x1200     59.88
   1920x1080     60.00    59.94    50.00    23.98
   1680x1050     59.95
   1600x1200     60.00
   1280x1024     75.02    60.02
   1280x800      59.81
   1280x720      59.94    50.00
   1152x864      75.00
   1024x768      75.03    60.00
   800x600       75.00    60.32
   720x576       50.00
   720x480       59.94
   640x480       75.00    59.93    59.94

Xorg.0.log:

[  3476.071] (--) NVIDIA(GPU-0): DELL P2418D (DFP-0): connected
[  3476.071] (--) NVIDIA(GPU-0): DELL P2418D (DFP-0): Internal TMDS
[  3476.071] (--) NVIDIA(GPU-0): DELL P2418D (DFP-0): 600.0 MHz maximum pixel clock
[  3476.071] (--) NVIDIA(GPU-0):
[  3476.101] (--) NVIDIA(GPU-0): DELL P2418D (DFP-0): connected
[  3476.101] (--) NVIDIA(GPU-0): DELL P2418D (DFP-0): Internal TMDS
[  3476.101] (--) NVIDIA(GPU-0): DELL P2418D (DFP-0): 600.0 MHz maximum pixel clock
[  3476.101] (--) NVIDIA(GPU-0):
[  3484.294] (II) AMDGPU(0): Allocate new frame buffer 2560x1440
[  3484.296] (II) AMDGPU(0):  => pitch 10240 bytes
[  3484.325] randr: failed to create shared pixmap
[  3484.329] (II) NVIDIA(G0): Setting mode "HDMI-1-0: nvidia-auto-select @2560x1440 +0+0 {AllowGSYNC=Off, ViewPortIn=2560x1440, ViewPortOut=2560x1440+0+0}"

The monitor works fine on Windows and the output is in the correct channel.
Any ideas on how to fix it? It might be a conflict between amd and nvidia drivers, but I'm not really sure. Thanks in advance.

CapSel

Member

Registered: 2011-08-26

Posts: 11

Re: Second monitor black screen

Same problem here.