Ultrawide monitor flickering at 120hz

[fraschm1998]

Info

dwl version:
wlroots version: gui-libs/wlroots-0.16.2-r1

Description

External monitor flickers when connected via USB-C port (it works fine via hdmi but caps at 75hz due to monitors hdmi limitations). If I downscale to 75hz via usb-c the monitor still flickers. This issue does not occur with hyprland.

Monitor specs: 3840x1600 144hz. Nvidia drivers are having issues so it only runs at 120hz.

Monitor.Flickering.mp4

[fraschm1998]

Hyprland works without any issues at 144hz via usb-c

[apprehensions]

dwl/dwl.c

Line 946 in 68a17f9

wlr_output_enable_adaptive_sync(wlr_output, 1);

change the 1 in this line to 0, i believe your flickering is caused by VRR; i faced the same issue when using the monitorconfig patch, had to change adaptive to simply 0.

[fraschm1998]

dwl/dwl.c

Line 946 in 68a17f9

wlr_output_enable_adaptive_sync(wlr_output, 1);

change the 1 in this line to 0, i believe your flickering is caused by VRR; i faced the same issue when using the monitorconfig patch, had to change adaptive to simply 0.

I tried that, also tried the monitor patch config and neither of them worked :/

[apprehensions]

Check your display is still non adaptive with wlr-randr.

[fraschm1998]

Check your display is still non adaptive with wlr-randr.

I did, Adaptive Sync: disabled

[sevz17]

@fraschm1998, can you give me the output of wlr-randr?

[fraschm1998]

@fraschm1998, can you give me the output of wlr-randr?

seems to be an issue with wlroots as it now also occurs on the latest release of Hyprland. I just created an issue here: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3687

[fraschm1998]

@fraschm1998, can you give me the output of wlr-randr?

error log:
logs.txt

[fraschm1998]

@sevz17 ^

[fraschm1998]

wlr-randr  
DP-1 "LG Electronics LG ULTRAWIDE 210NTNH7S559 (DP-1)"
  Make: LG Electronics
  Model: LG ULTRAWIDE
  Serial: 210NTNH7S559
  Physical size: 930x390 mm
  Enabled: yes
  Modes:
    5120x2160 px, 71.998001 Hz (current)
    5120x2160 px, 59.985001 Hz
    5120x2160 px, 50.000000 Hz
    5120x2160 px, 30.000000 Hz
    3440x1440 px, 72.000000 Hz
    1920x1080 px, 60.000000 Hz
    1920x1080 px, 59.938999 Hz
    1280x720 px, 59.943001 Hz
    1024x768 px, 60.004002 Hz
    800x600 px, 60.317001 Hz
    720x480 px, 59.939999 Hz
    640x480 px, 59.939999 Hz
    640x480 px, 59.929001 Hz
  Position: 0,0
  Transform: normal
  Scale: 1.000000
  Adaptive Sync: disabled
eDP-1 "Sharp Corporation LQ140M1JW46 (eDP-1)"
  Make: Sharp Corporation
  Model: LQ140M1JW46
  Serial: (null)
  Physical size: 310x170 mm
  Enabled: yes
  Modes:
    1920x1080 px, 120.002998 Hz (preferred, current)
    1920x1080 px, 60.004002 Hz
  Position: 5120,0
  Transform: normal
  Scale: 1.000000
  Adaptive Sync: disabled

[fraschm1998]

@sevz17 This issue was fixed in the latest release of hyprland 0.28.0