Acer XV273K fails to recover from sleep mode in Windows 11

Soldato
Joined
1 Apr 2014
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19,073
Location
Aberdeen
I've just upgraded this PC to Windows 11 - an in-place upgrade from Windows 10 to 11 - and have found an interesting issue: when I wake the PC only the right half of my Acer Nitro monitor wakes. The left-hand half of the screen stays asleep (or leastwise displays nothing). This monitor has a special mode for 144 Hz which requires two DP cables but I do not use that mode, and have checked the monitor's settings to ensure it is off. Windows is set to use the 120 Hz mode. To recover, I have to switch the monitor to another input and then switch back.

System Specs: RTX 4090, Intel 13700, 64 GB DDR4. Nvidia drivers up to date. 120 Hz Acer Nitro XV273k. Two other 60 Hz 4k monitors. Windows 11 latest.

Any suggestions?
 
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