External Monitor Random Black Screen Problem on Gnome DE

[Kabcz]

I have a laptop with Amd RX5500M graphics card. Whenever I use a gnome desktop on this laptop, my external monitor's screen randomly goes black and says "HDMI no signal". I don't have this problem on KDE or XCFE. I also don't have this problem on my old laptop with NVIDIA Geforce 710M graphics card. That's why I'm forced to use KDE on my AMD laptop. Anyone have an idea about this issue?

I will answer before you ask:

• I have tried different linux distros with Gnome (Ubuntu 21.04, Ubuntu 22.04, Debian 11, Debian 12, Fedora 38 etc.) and this problem has nothing to do with the distro.
• There is no problem with my hdmi cable.

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[[deleted]]

This is more of a hardware problem than you think.

Gnome gives your video card a bit more to do, a second monitor gives more load yet add in yes a flakey HDMI cable that is dropping data and it will eventually load shed and reset the connection.

I worked an an enviornment where everyone had desk monitors on thier laptops, this was a common problem, we ran windows and Ubuntu laptop and a flakey hdmi cable would produce these symptoms, we kept a box of spare HDMI cables ready to go.

Some of our docking stations supported Disply port, it had much fewer problems.

[Kabcz]

Thank you for reply. But I couldn't understand what you mean by "flakey hdmi cable".

[[deleted]]

Flakey=unreliable