kern/60978: Periodic freezes and kernel panics on NetBSD 11.1

["Jakaboo24%gmail.com@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60978
>Category:       kern
>Synopsis:       Periodic freezes and kernel panics on NetBSD 11.1
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 07 06:50:00 +0000 2026
>Originator:     Jacob
>Release:        NetBSD 11.1
>Organization:
none
>Environment:
NetBSD L420 11.1 NetBSD 11.1 (GENERIC) #0: Mon Nov 2 16:34:32 UTC 2026 mkrepro
@mkrepro.NetBSD.org/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
While using the X (I have yet to observe this in the shell, but I have not spent long there so perhaps it could affect outside of X), I would, within 30 minutes of use experience brief freezes, and kernel panics preceeded by longer freezes

Viewing /var/log/messages, I see the message "reboot after panic [2399.4974088] panic: inputstate should never be -6" soon after reboot.

Brightness will also be automatically lowered to minimum upon reboot, even at POST.
>How-To-Repeat:
I can't quite tell what aggrevates this issue, but once, it came almost immediately after editting a file with vi.
>Fix:
I do not know.