kern/42058: Kernel hangs during warm boot on NEC Versa Daylite

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         42058
>Category:       kern
>Synopsis:       Kernel hangs during warm boot on NEC Versa DayLite
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Sep 13 20:05:00 +0000 2009
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current source date 2009.09.13.05.17.37
>Organization:
>Environment:
System: NetBSD gunnel.gson.org GENERIC i386
Architecture: i386
Machine: i386
>Description:

When I boot a NetBSD-current GENERIC kernel (CVS source date
2009.09.13.05.17.37) on a NEC Versa DayLite laptop by typing "reboot"
in a running NetBSD system and then typing the kernel file name at the
boot prompt, it hangs after printing the line

  acpi0 at mainbus0: Intel ACPICA 20090730

A NetBSD 4.99.34 kernel (CVS source date 2007.10.17.19.55.31) behaves
similarly, hanging after printing the lines

  acpi0 at mainbus0: Advanced Configuration and Power Interface
  ACPI-Safe 32-bit timer

When I do cold boots (booting from power-up), the kernels do not
hang.

>How-To-Repeat:

See above.

>Fix: