Can not set Display resolution to 3440x1440 for Dell monitor

[amach4]

Tested to set edid file based on the steps described at:

Edge2 Doesn't display via HDMI on Ubuntu 24

Hello, Thanks for the help so far. I managed to fix this on my own using this: Steps to reproduce: Install wxEDID sudo apt-get install wxedid Find the current EDID file: find /sys/ -name "*HDMI*" Returns this: /sys/devices/platform/display-subsystem/drm/card0/card0-HDMI-A-1 copy the EDID to another folder: cp /sys/devices/platform/display-subsystem/drm/card0/card0-HDMI-A-1/edid ~/edid.bin open in wxedit and follow the above link: vsig_format → replace 0b01 wih 0b00 CEA-861 header →…

but no success so far