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NILI just received a wide screen with a 2560x1080 resolution but xrandr
wasn't allowing me to use it. The intel graphics specifications say
that I should be able to go up to 4096xsomething so it's a software
problem.
Generate the informations you need with the **gtf** command:
$ gtf 2560 1080 59.9
Keep the numbers after the resolution name between quotes, so in
`Modeline "2560x1080_59.90" 230.37 2560 2728 3000 3440 1080 1081 1084 1118 -HSync +Vsync`
keep only `230.37 2560 2728 3000 3440 1080 1081 1084 1118 -HSync +Vsync`
Now add the new resolution and make it available to your output
(mine is HDMI2):
$ xrandr --newmode "2560x1080" 230.37 2560 2728 3000 3440 1080 1081 1084 1118 -HSync +Vsync
$ xrandr --addmode HDMI2 2560x1080
You can now use this mode with arandr using the GUI or with xrandr by
typing `xrandr --output HDMI1 --mode 2560x1080`
You will need to set the new mode each time the system start. I added
the 2 lines in my ~/.xsession file which starts stumpwm.