Intel 12th-gen iGPU freezes

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In case anyone is like me and arrived here through Google/forum search, I managed to get things working by setting the video driver to modesetting and flipping enable_psr to 1:

services.xserver.videoDrivers = [ "modesetting" ];
# NixOS docs suggest this.
services.xserver.useGlamor = true;

boot.kernelParams = [
    "i915.enable_psr=1"
];

Without that kernel parameter, Xorg would load but would freeze and stutter for a few seconds periodically - it was basically unusable.

Unfortunately it doesn’t seem like the modesetting driver supports TearFree like the old Intel one. Given that most of Qt applications I tried were broken on the Intel driver I think this is currently the only choice for the 12th Gen Framework.

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