kern/50085: Keyboard stops working after some X restarts

[silasdb%gmail.com@localhost]

>Number:         50085
>Category:       kern
>Synopsis:       Keyboard stops working after some X restarts
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 25 01:50:00 +0000 2015
>Originator:     Silas Silva
>Release:        NetBSD 7.0_RC1
>Organization:
>Environment:
System: NetBSD hope.domain.name 7.0_RC1 NetBSD 7.0_RC1 (GENERIC.201506190427Z) i386
Architecture: i386
Machine: i386
>Description:
	NetBSD 7.0_RC1 is really great but it looks there are some caveats.
	The only I'm sure is that if I restart the X server some times,
	keyboard stops working.  A new message in dmesg says:

	ehci1: missed microframe, TT reset not implemented, hub might be inoperational
>How-To-Repeat:
	Restart X several times with startx.
>Fix: