Comment # 4
on bug 107781
from Alex Findler
I've tried with all kernels that Fedora offered during the last two months, including 4.16 varieties. These are the kernel options I tried: radeon.cik_support=0 amdgpu.cik_support=1 scsi_mod.scan=sync amdgpu.gpu_recovery=1 amdgpu.dc=1 I have now added the option iommu=soft, and it seems to solve the problem! I have tried suspend via script (echo mem > /sys/power/state), via hardware button, and via plasmashell option, and all come back, including wake-up by lid signal. I'll test this for a couple of days now and see if it works persistently, then report back. Thanks for your quick reaction, it is much appreciated.
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