Public bug reported:
I have Ubuntu Studio 24.04 and Ubuntu 24.04 - the problem is identical
on both. Namely, I have a 4K external monitor connected to my laptop. I
would like to use the native 4K resolution on both the laptop and the
external monitor. Unfortunately, if I use the 4K resolution, every time
the computer goes into sleep mode or just screen saver mode, the
external screen doesn't wake up. Changing the resolution to a lower one
and then back to 4K helps, and everything works until the next sleep.
The problem does not occur at resolutions lower than 4K - the external
monitor wakes up every time.
I am using an NVIDIA GeForce 2080 RTX graphics card with the nvidia-
driver-550 drivers, but I have checked with several earlier versions.
The same issue occurs with the Nouveau drivers.
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2066129
Title:
The external monitor does not wake up from sleep at 4K resolution
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