Nothing out of the ordinary. I also use Ubuntu on other machines. So far support for AMD/Intel/Nvidia GPUs + OpenCL is very similar between Debian and Ubuntu.
If you have already exhausted power management settings in both your desktop environment and the monitor’s own setup menu, then I would check cable, try with a replacement or diffferent type (Displayport/HDMI).
Yeah, most times, but unfortumately not always. It can happen, that with the same Ubuntu version and the same hardware, 1 pc works fine, the other not.
I hate it most, when things work perfect for months, then make big problems and then it works again. Especially with my monitors. I did nothing else than to swicht cables, HDMI - DP, a.s.o. It does work with old and new hardware, you can change things as you want.
I change cables, always use very expensive ones, changed an expensive professionell monitor, a.s.o, it works when the system wants and then not. It could be everything. So the solution would be something complete new, except the (exchanged) monitor. Maybe it is a problem with Asus.
The B580 needs minimum 24.10, not happy about this, it is no LTS version.
Edit:
Maybe it is supported now: Future Ubuntu 24.04.2 LTS support · Issue #8 · canonical/intel-graphics-preview · GitHub
and there is a repo:
I saw you used Ryzen 7.
Which motherboard do you use?
I am very unsure if I should buy a Ryzen 9. The cpu, which I want, is limited with TDP 65W.
Problem with Ryzen 9 is the motherboard and Ubuntu. Looks like there is only 1 affordable and that ist very expensive.
MSI Motherboard MPG X870E CARBON WIFI (MS-7E49) 1.0 should work, while Gigabyte Technology Motherboard X870E AORUS ELITE WIFI7 doesnt work with network-drivers.
Would you buy nowadays a Ryzen 7 or 9? The bottleneck in my system is Darktable and handbrake, for the rest a 10 year old pc with linux would be fine.