Re: port-amd64/58344: Machine hangs at end of shutdown -r

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

The following reply was made to PR port-amd64/58344; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: "Hauke Fath (SPG)" <hf%spg.tu-darmstadt.de@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, port-amd64-maintainer%NetBSD.org@localhost,
	gnats-admin%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost
Subject: Re: port-amd64/58344: Machine hangs at end of shutdown -r
Date: Mon, 17 Jun 2024 13:46:40 +0000

 > Date: Mon, 17 Jun 2024 10:43:20 +0200
 > From: "Hauke Fath (SPG)" <hf%spg.tu-darmstadt.de@localhost>
 > 
 > On 2024-06-14 14:32, Taylor R Campbell wrote:
 > > If you have serial console access, can you enter ddb and get a stack
 > > trace when this happens?
 > 
 > Since I can reproduce the issue at will: Is there any debug option that 
 > would give more information about the last seconds before reboot?
 
 Some things you could try:
 
 1. set cpureset_delay to 0 (e.g., enter ddb and `w cpureset_delay 0')
    before attempting reboot, and see if that makes a difference --
    maybe delay() is broken at that point somehow
 
 2. sprinkle printfs into x86_reset in sys/arch/x86/x86/x86_machdep.c
    and acpi_reset in sys/dev/acpi/acpi.c to see exactly what it is
    trying and where it is stopping
 
 3. share `acpidump -dt' output if it's hanging in acpi_reset