No 8k with latest 550 but working with 545

Hello everybody!

I get 8k/60Hz with my 3050 and 8K TV (samsung qn700b) when i use nvidia 545.29, but when i update to latest 550.54.14 i only get crazy flickering and it claims to be at 8k but is only at 4k.
The same flickering happens when i try to switch to 4k/120Hz.

I tried it with my current manjaro linux install and the latest manjaro live iso which fortunatly includes 545.29.

I have not tried any version inbetween and am currently running the 545.29 from the nvidia installer.

I am working on getting the bugreport log.

Thank you for any idea!

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nvidia-bug-report.log (6.5 MB)