Maybe this is because Nvidia proprietary driver doesn't support XRandR 1.4? And that XRandR 1.4 unfortunately wasn't merged even for the upcoming Xorg 1.12 release.
Maybe this is because Nvidia proprietary driver doesn't support XRandR 1.4?
And that XRandR 1.4 unfortunately wasn't merged even for the upcoming Xorg 1.12 release.