xrandr - Issues using --left-of to set up a second display

SafetyPotato · 04-30-2022, 06:28 AM

I have two monitors, DP-3 with 2560x1440 resolution, and HDMI-1 with 1920x1200 resolution. I want HDMI-1 to be displayed to the left of DP-3. When I run xrandr --output HDMI-1 --auto --right-of DP-3 everything displays as intended, but when I use --left-of the entirety of what originally displayed on HDMI-1 gets displayed on the DP-3 monitor and the rest of what was originally displayed on DP-3 extends into the monitor of HDMI-1.

I don't know if this helps, but I'm using i3 and LightDM as my windowing and display managers

mrmazda · 04-30-2022, 03:33 PM

What does inxi -GSaz report? (install inxi if not already installed)

What does xrandr --output DP-3 --auto --right-of HDMI-1 do?

What does xrandr --output HDMI-1 --primary --output DP-3 --auto --right-of HDMI-1 do?

SafetyPotato · 05-01-2022, 08:49 AM

What does inxi -GSaz report? (install inxi if not already installed):

System:
Kernel: 5.17.3-arch1-1 arch: x86_64 bits: 64 compiler: gcc v: 11.2.0
parameters: BOOT_IMAGE=/boot/vmlinuz-linux
root=UUID=b00c167a-dc98-4d36-a3c1-0ded6d8fbc0e rw nouveau.modset=0
loglevel=3 quiet
Desktop: i3 v: 4.20.1 info: i3bar vt: 7 dm: LightDM v: 1.30.0
Distro: Arch Linux
Graphics:
Device-1: NVIDIA GA102 [GeForce RTX 3080 Ti] driver: nouveau v: kernel
pcie: gen: 4 speed: 16 GT/s lanes: 16 ports: active: DP-3,HDMI-A-1
empty: DP-1,DP-2 bus-ID: 0b:00.0 chip-ID: 10de:2208 class-ID: 0300
Display: x11 server: X.org v: 1.21.1.3 driver: X: loaded: modesetting
alternate: fbdev,nouveau,nv,vesa gpu: nouveau display-ID: :0 screens: 1
Screen-1: 0 s-res: 4480x1440 s-size: <missing: xdpyinfo>
Monitor-1: DP-3 pos: primary,left model: LG (GoldStar) ULTRAGEAR
serial: <filter> built: 2021 res: 2560x1440 hz: 165 dpi: 93 gamma: 1.2
size: 697x392mm (27.44x15.43") diag: 800mm (31.5") ratio: 16:9 modes:
max: 2560x1440 min: 640x480
Monitor-2: HDMI-A-1 mapped: HDMI-1 pos: right model: Asus VS24A
serial: <filter> built: 2014 res: 1920x1200 hz: 60 dpi: 94 gamma: 1.2
size: 518x324mm (20.39x12.76") diag: 611mm (24.1") ratio: 16:10 modes:
max: 1920x1200 min: 640x480

What does xrandr --output DP-3 --auto --right-of HDMI-1 do?

Gives same exact issue I described when I used xrandr --output HDMI-1 --auto --left-of DP-3

What does xrandr --output HDMI-1 --primary --output DP-3 --auto --right-of HDMI-1 do?

Gives same exact issue I described when I used xrandr --output HDMI-1 --auto --left-of DP-3

I think it's also worth mentioning that while the displays are messed up, it seems like the environment still thinks the windows are in their original positions. So, say a terminal screen on that was originally displayed on DP-3 gets shifted into the display of HDMI-1, I still have to click on the area where it originally was on DP-3 in order for me to interact with it.

mrmazda · 05-02-2022, 07:18 AM

Same results if you leave out --auto? It's not needed here, and both right-of and left-of produce expected results:

Code:

# inxi -GSaz
System:
  Kernel: 5.17.4-1-default arch: x86_64 bits: 64 compiler: gcc v: 11.2.1
    parameters: root=LABEL=<filter> ipv6.disable=1 net.ifnames=0 noresume
    mitigations=auto consoleblank=0 5
  Desktop: KDE v: 3.5.10 tk: Qt v: 3.3.8c info: kicker wm: kwin vt: 7
    dm: KDM Distro: openSUSE Tumbleweed 20220428
Graphics:
  Device-1: NVIDIA GF119 [NVS 310] vendor: Hewlett-Packard driver: nouveau
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 16 ports: active: DP-1,DP-2
    empty: none bus-ID: 01:00.0 chip-ID: 10de:107d class-ID: 0300
  Display: x11 server: X.Org v: 21.1.3 driver: X: loaded: modesetting
    unloaded: fbdev,vesa alternate: nouveau,nv,nvidia gpu: nouveau
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 4480x1440 s-dpi: 120 s-size: 948x304mm (37.32x11.97")
    s-diag: 996mm (39.19")
  Monitor-1: DP-1 pos: primary,left model: Acer K272HUL serial: <filter>
    built: 2018 res: 2560x1440 hz: 60 dpi: 109 gamma: 1.2
    size: 598x336mm (23.54x13.23") diag: 686mm (27") ratio: 16:9 modes:
    max: 2560x1440 min: 720x400
  Monitor-2: DP-2 pos: right model: NEC EA243WM serial: <filter>
    built: 2011 res: 1920x1200 hz: 60 dpi: 94 gamma: 1.2
    size: 519x324mm (20.43x12.76") diag: 612mm (24.1") ratio: 16:10 modes:
    max: 1920x1200 min: 640x480
  OpenGL: renderer: NVD9 v: 4.3 Mesa 22.0.2 direct render: Yes
# ls -1 /sys/class/drm
card0
card0-DP-1
card0-DP-2
renderD128
version

Above is from my newest NVidia GPU, 10+ years old, with no hdmi outputs. My older ones only have HDMI + DVI + VGA, e.g.:

Code:

# inxi -GSaz
System:
  Kernel: 5.17.4-1-default arch: x86_64 bits: 64 compiler: gcc v: 11.2.1
    parameters: root=LABEL=<filter> ipv6.disable=1 net.ifnames=0 noresume
    mitigations=auto consoleblank=0 vga=791 video=1440x900@60 5
  Desktop: KDE Plasma v: 5.24.4 tk: Qt v: 5.15.2 wm: kwin_x11 vt: 7 dm: KDM
    Distro: openSUSE Tumbleweed 20220428
Graphics:
  Device-1: NVIDIA GT218 [GeForce 210] vendor: eVga.com. driver: nouveau
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 16 ports:
    active: DVI-I-1,HDMI-A-1 empty: VGA-1 bus-ID: 01:00.0 chip-ID: 10de:0a65
    class-ID: 0300
  Display: x11 server: X.Org v: 21.1.3 compositor: kwin_x11 driver: X:
    loaded: modesetting unloaded: fbdev,vesa alternate: nouveau,nv,nvidia
    gpu: nouveau display-ID: :0 screens: 1
  Screen-1: 0 s-res: 4480x1440 s-dpi: 120 s-size: 948x304mm (37.32x11.97")
    s-diag: 996mm (39.19")
  Monitor-1: DVI-I-1 pos: primary,left model: Acer K272HUL serial: <filter>
    built: 2018 res: 2560x1440 hz: 60 dpi: 109 gamma: 1.2
    size: 598x336mm (23.54x13.23") diag: 686mm (27") ratio: 16:9 modes:
    max: 2560x1440 min: 720x400
  Monitor-2: HDMI-A-1 mapped: HDMI-1 pos: right model: NEC EA243WM
    serial: <filter> built: 2011 res: 1920x1200 hz: 60 dpi: 94 gamma: 1.2
    size: 519x324mm (20.43x12.76") diag: 612mm (24.1") ratio: 16:10 modes:
    max: 1920x1200 min: 640x480
  OpenGL: renderer: NVA8 v: 3.3 Mesa 22.0.2 direct render: Yes
# ls -1 /sys/class/drm
card0
card0-DVI-I-1
card0-HDMI-A-1
card0-VGA-1
renderD128
version

This too behaves as expected.