kern/59242: keyboard/mouse stop working in X

[paul%whooppee.com@localhost]

>Number:         59242
>Category:       kern
>Synopsis:       keyboard/mouse stop working in X
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 31 15:35:00 +0000 2025
>Originator:     Paul Goyette
>Release:        NetBSD 10.99.12
>Organization:
+---------------------+--------------------------+----------------------+
| Paul Goyette (.sig) | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)           | 1B11 1849 721C 56C8 F63A | paul%whooppee.com@localhost    |
| Software Developer  | 6E2E 05FD 15CE 9F2D 5102 | pgoyette%netbsd.org@localhost  |
| & Network Engineer  |                          | pgoyette99%gmail.com@localhost |
+---------------------+--------------------------+----------------------+
>Environment:
	
	
System: NetBSD speedy.whooppee.com 10.99.12 NetBSD 10.99.12 (SPEEDY 2025-03-28 23:40:52 UTC) #0: Sat Mar 29 00:36:14 UTC 2025 paul%speedy.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY amd64
Architecture: x86_64
Machine: amd64
>Description:
At unpredictable interval, and with no known/reproducible trigger, the
keyboard and mouse events stop.  All keyboard activity, including Ctrl-
Alt sequences for switching vt or entering ddb, just stop.  And, after
approximately 1 minute, background processes seem to stop - as an example,
a running xclock ceases to display movement of the seconds hand.

Most occurrences of this have occurred while moving the cursor in a
browser window.  Both firefox and chromium exhibit the bug, but chromium
"feels less likely" to happen.

Since it is impossible to enter ddb, I can't collect any additional info.
I am just filing this PR in case someone else runs into something similar
with more debug tools available.
	
>How-To-Repeat:
unknown
	
>Fix:
	A fix would be nice.

>Unformatted: