[Bug 199357] amdgpu: hang a few seconds after logging in, most likely due to regression

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=199357

--- Comment #7 from Mathias Tillman (master.homer at gmail.com) ---
Wanted to add some more info. The soft lock up will release after approximately
30 seconds, but after a few seconds it will lock up again and repeat.
Looking at the kernel log, it seems that when the lock up happens, it takes an
abnormally long time to reach the dm_pflip_high_irq function which is supposed
to trigger the flip_done message.
I've attached a new log with my added logging in case that helps.

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