see testing:
And I also affected by this issue, using LTS Kernel “solved” it for me as Arch Linux recommends:
Suspend/hibernate does not work, or does not work consistently
There have been many reports about the screen going black without easily viewable errors or the ability to do anything when going into and coming back from suspend and/or hibernate. These problems have been seen on both laptops and desktops. This is not an official solution, but switching to an older kernel, especially the LTS-kernel, will probably fix this.
would also be interesting to know if this regression still exists in 6.0-rc2