[Bug 68178] evergreen: hard lockup on suspend and resume with dpm

https://bugs.freedesktop.org/show_bug.cgi?id=68178

--- Comment #2 from nine@detonation.org --- (In reply to comment #1)

It's not the firmware per se. It's probably the new dpm code. Do you still get when dpm is disabled?

Indeed. If I turn off dpm, I can suspend successfully and more or less successfully resume. But a few seconds after resume my X server dies. May be related or not. Attaching a dmesg taken after that.

It's strange though that with an older kernel I still get hangs on suspend and resume even though they do not support dpm at all.

So how can I proceed?