[Bug 204241] amdgpu fails to resume from suspend

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https://bugzilla.kernel.org/show_bug.cgi?id=204241

--- Comment #59 from Jaya Balan Aaron (bucket.size@xxxxxxxxx) ---
Comment on attachment 288507
  --> https://bugzilla.kernel.org/attachment.cgi?id=288507
arch linux 5.6 resolution with kernel params

Hi,

Using arch linux kernel 5.5zen, 5.6. Not sure if it's a solution but,
interesting to note.


With 5.6, with kernel params 'amd_iommu=on iommu=pt', able to suspend/resume
correctly 10/10 times. Without the params resume hanged with a blank and
backlit screen 2/2 times.


With 5.5zen, even with the same kernel params, resume hanged 2/2 times.


Reason for the kernel params is that I was trying to set up gpu passthrough
with kvm.

Suspend resumes immediately sometimes, but I think that's because of
mis-configured, keyboard/mouse/usb wake triggers.

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