I am trying out the NREAL Air, and after extensive testing I've found that it is more comfortable for me to use it at the not-edid-available 90 Hz mode. I was able to find this by setting the following parameters in the "screen" section of my xorg conf.
Option "UseEDID" "false"
Option "ModeDebug" "true”
Option "ExactModeTimingsDVI" "true"
Option "ModeValidation" "NoEdidModes, NoMaxPClkCheck, AllowNonEdidModes"
And then appropriately configuring the rest of my xorg.conf. See https://gist.github.com/cnlohr/9375d6fc0097b50f73c4da7b75a20e83
This has the added beneift of you being able to use custom ModeLine with xrandr. Which is awesome, btw!
sudo xrandr --output DP-2 --newmode HS2 200 1920 1952 1968 2000 1080 1089 1094 1250 +hsync +vsync
sudo xrandr --addmode DP-2 HS2
sudo xrandr --output DP-2 --mode HS2
But, this does not work with display managers, like lightdm, which switch into my desired mode, and then immediately switch to the default 1024x768 for both monitors, which my laptop display cannot handle.
It does, however, work with startx but I'd rather not use my system that way, as I like display managers.
Even if I use custom ModeValidation commands, as soon as I don't disable UseEDID the NVIDIA drivers seem to block xrandr from doing any particularly interesting modes, failing with the following error:
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 45
Current serial number in output stream: 46
So, I'm in a bit of a pickle. If I want to use the smoother, less headache-inducing mode for the NREAL AIR, I can't use EDIDs, but what is a life without EDIDs?
