My monitor does the same thing.  I am using a NVIDIA GeForce GTX 1050 Ti.

On Mon, 2 Aug 2021 12:09:11 -0400 Alex wrote:

Hi,

I have fedora34 installed on my desktop with three monitors; two of

them are older 27" Samsungs, and the third is a new 34" Samsung

S34J55x. Occasionally, the 34" seems to shut off for a second, then

comes back on and continues to work normally.

 

Has anyone seen this type of behavior before? The other two monitors

have never done this. However, when it happens, the other two seem to

follow with shutting off for a second. It always seems to be driven by

the new 34" monitor.

 

The problem is that, when this happens, all of the windows on the 34"

monitor move to the 27" monitor on the right once the monitors turn on

again.

 

This is not a power problem, as the entire computer is connected to

the same power strip, backed by a 2200W UPS.

 

My video card is also new - it's a Radeon RX570. All three monitors

are connected via displayport.

 

I do see lines in my Xorg.0.log file periodically along the lines off

the following:

[992023.990] (EE) event3  - Logitech Gaming Mouse G900: client bug:

event processing lagging behind by 16ms, your system is too slow

[994674.766] (EE) event6  - Logitech Gaming Keyboard G910: client bug:

event processing lagging behind by 29ms, your system is too slow

 

But are they related? Is this also an issue? The system itself is a

12-core with 64GB of RAM, so certainly not slow.

Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz

 

Please let me know what more I can do to troubleshoot this before

contacting Samsung directly.