[Pkg-xen-devel] Bug#991967: Simply ACPI powerdown/reset issue?

[Chuck Zmudzinski]

On 9/25/2021 11:27 PM, Elliott Mitchell wrote:
>
> I checked out the Debian Xen source via git.  I got the current
> "master" branch which is presently the candidate 4.14.3-1 version,
> which includes urgent fixes.  The hash is:
> e7a17db0305c8de891b366ad37777528e5a43015
>
> On top of this I cherry-picked 3 commits from Xen's main branch:
> 5a4087004d1adbbb223925f3306db0e5824a2bdc
> 0f089bbf43ecce6f27576cb548ba4341d0ec46a8
> bc141e8ca56200bdd0a12e04a6ebff3c19d6c27b
>
> (these can be retrieved via Xen's gitweb at
> https://xenbits.xen.org/gitweb/?p=xen.git;a=patch;h=<$hash> which is
> suitable for the `git am` command)
>
> With these I built 4.14.3-1 and then tried kernels 4.19.181-1 and
> 4.19.194-3 (this system is presently mostly on oldstable).  The results
> were:
>
> Xen 4.14.3-1 with Linux 4.19.181-1: system reboots were successful
>
> Xen 4.14.3-1 with Linux 4.19.194-3: system reboots hung

I presume the Xen 4.14.3-1 you are referring to is not the
official version, but the one patched with the three extra
aforementioned commits. Note: I use quilt to manage the
packages, and quilt rejected the last commit because the
context within three lines of the patched code was changed.
A goto bad was changed to goto done by another commit
on the Xen unstable branch, so I fixed the patch file
and changed the 'done' to 'bad' to get the third patch to succeed.
Let's call this patched version of Xen version 4.14.3-1.1

I tried these on my hardware, which is a Haswell processor, EFI
boot, and systemd for init, and my results are:

Xen 4.14.3-1.1 with Linux 4.19.181-1: system reboots hung
Xen 4.14.3-1.1 with Linux 4.19.194-3: system reboots hung
Xen 4.14.3-1.1 with Linux 5.10.46-4: system reboots hung

I still cannot reproduce this result, not even with the extra three
commits. Perhaps it depends on differences in the BIOS or EFI, or
maybe systemd vs. sysv.

I share this result in case it is of help to you.

Regards,

Chuck Zmudzinski