(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?