Comment # 9
on bug 100437
from Greg Turner
Just another datapoint on this... I have this disease with a (non-reference) Asus RX480 in an Asus Sabertooth Gen3 R2.0 (or something like that, I can never remember exactly what it's called). It does not fix itself when I reboot. If I turn off IOMMU entirely in the BIOS (not just the memory hole), then it goes away (along, of course, with my iommu functionality, which I'm not thrilled about). I can also boot and avoid the spam with iommu=pt or iommu=soft. I have also seen brief "flashing screen" artifacts in xorg, which get more frequent if I stress the system (doesn't need to be graphics related). Whether these correlate with the log spam, I'm not entirely sure. I think it may, but it might instead have been related to a firmware loading problem that I've since resolved... I'd have to try it again to be sure. Like the OP, when I get the log spam I also see this: May 22 14:23:21 moneypit kernel: amdgpu: [powerplay] [AVFS] Something is broken. See log! May 22 14:23:21 moneypit kernel: amdgpu: [powerplay] Can't find requested voltage id in vdd_dep_on_sclk table!
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