Roger Price composed on 2021-09-06 10:45 (UTC+0200):
> Debian 11, Nvidia Quadro P400 card, 2xiiyama 2560x1440 monitors, and the
> nvidia
> driver.
> I am trying to get 2 iiyama monitors rotated to portrait mode to show a
> single
> 2880x2560 screen, but so far only the left monitor lights up with a 1440x2560
> screen.
> The Quadro P400 has 3 mini-DisplayPort connectors numbered 1, 2 and 3
> starting
> from the motherboard.
> ,-------------------,
> DP-4 3 |
> Right monitor DP-0 2 Quadro P400 |
> Left monitor DP-2 1 |
> MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM Motherboard
> xrandr reports that these ports are seen as 1 -> DP-2, 2 -> DP-0, 3 -> DP-4.
> I connect mini-DisplayPort 1 (DP-2) to the left side monitor and
> mini-DisplayPort 2 (DP-0) to the right monitor. There is nothing connected
> to
> port 3.
>
FOSS drivers and xrandr work for me:
# cat /etc/X11/xorg.conf
cat: /etc/X11/xorg.conf: No such file or directory
# xrandr --output DP-1 --mode 2560x1440 --primary --rotate left --output DP-2
--mode 2560x1080 --rotate left --right-of DP-1
# xrandr | egrep 'onnect|creen|\*' | grep -v disconn | sort -r
Screen 0: minimum 320 x 200, current 2520 x 2560, maximum 16384 x 16384
DP-2 connected 1080x2560+1440+0 left (normal left inverted right x axis y axis)
673mm x 284mm
DP-1 connected primary 1440x2560+0+0 left (normal left inverted right x axis y
axis) 598mm x 336mm
2560x1440 59.95*+
2560x1080 60.00*+
# inxi -S
System:
Host: p5bse Kernel: 5.10.0-8-amd64 x86_64 bits: 64 Desktop: Trinity R14.0.11
Distro: Debian GNU/Linux 11 (bullseye)
# inxi -Gay
Graphics:
Device-1: NVIDIA GF119 [NVS 310] vendor: Hewlett-Packard driver: nouveau
v: kernel bus-ID: 01:00.0 chip-ID: 10de:107d class-ID: 0300
Display: x11 server: X.Org 1.20.11 driver: loaded: modesetting
unloaded: fbdev,vesa display-ID: :0 screens: 1
Screen-1: 0 s-res: 2520x2560 s-dpi: 120 s-size: 533x541mm (21.0x21.3")
s-diag: 759mm (29.9")
Monitor-1: DP-1 res: 1440x2560 hz: 60
Monitor-2: DP-2 res: 1080x2560 hz: 60
OpenGL: renderer: NVD9 v: 4.3 Mesa 20.3.5 direct render: Yes
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