kern/52378: radeondrmkms doesn't recover the console after X server death

[dholland%eecs.harvard.edu@localhost]

>Number:         52378
>Category:       kern
>Synopsis:       radeondrmkms doesn't recover the console after X server death
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 08 01:00:00 +0000 2017
>Originator:     David A. Holland
>Release:        NetBSD 7.99.65 (20170309)
>Organization:
>Environment:
System: NetBSD macaran 7.99.65 NetBSD 7.99.65 (MACARAN) #41: Thu Mar 9 19:33:59 EST 2017 dholland@macaran:/usr/src/sys/arch/amd64/compile/MACARAN amd64
Architecture: x86_64
Machine: amd64
>Description:

Today I got
   UVM: pid 8645.1 (Xorg), uid 0 killed: out of swap

and this left the console dead: monitor in powersave and keyboard also
apparently unresponsive.

At this point we ought to be able to recover after such an event.

Also, I would think that using ctrl-alt-Fn to switch to another
virtual console with an X server in it would bring the display back,
but apparently not.

>How-To-Repeat:

kill -9 Xorg

>Fix:

dunno.

Workaround: log in remotely as any user, run "X -- :5 &" (for some
unused display number :5), then kill it.