Re: kern/58026: amdgpu suspend/resume almost works

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> after suspend/resume cycle where X11 was the active console, the
> display shows a blank screen with a cursor in the top-left, and
> requires switching the vt away from X and then back to it, where it
> works fine.  it seems like the display is left in "text" mode at
> this point..

I see this on my Thinkpad T480 with Intel graphics too.  Annoying but
I never got around to tracking it down.  Probably involves spelunking
through the same logic as the usl_detachtimeout state machine horror.
But we should fix it even if that sounds like an unappetizing
adventure.