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4 April 2017
I have a LG 25UM57-P monitor that has 2560x1080 21:9 resolution. It worked perfectly on Dell Latitude, but on Dell Precision the option was just gone. I have tried multiple solutions, tried to disable edid file limitations, but nothing worked. The solution for me was to use Noveau drivers instead of Nvidia proprietary drivers.
I had Nvidia proprietary drivers installed and wished to keep those. Since I use Arch Linux so the nouveau package for me is "xf86-video-nouveau".
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  1. sudo pacman -S xf86-video-nouveau
Programming Language: Bash
Then I had to disable nouveau blacklisting. In "/usr/lib/modprobe.d/nvidia.conf". It's highly recommended to uninstall the nvidia package or after upgrade there might be some anomalies, since this was reset after nvidia package got updated.
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  1. #blacklist nouveau
Programming Language: Text
Lastly add nouveau to xorg configuration. In "/etc/X11/xorg.conf.d/20-nouveau.conf".
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  1. Section "Device"
  2. Identifier "Nvidia card"
  3. Driver "nouveau"
  4. EndSection
Programming Language: Text