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Date:   Wed, 6 Dec 2023 10:56:40 +0100
From:   "Linux regression tracking (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     Gerd Hoffmann <kraxel@...hat.com>
Cc:     1054514@...s.debian.org, Dave Airlie <airlied@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org,
        spice-devel@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, regressions@...ts.linux.dev,
        Timo Lindfors <timo.lindfors@....fi>,
        Salvatore Bonaccorso <carnil@...ian.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: Bug#1054514: linux-image-6.1.0-13-amd64: Debian VM with qxl
 graphics freezes frequently

Hi, Thorsten here, the Linux kernel's regression tracker. Top-posting
for once, to make this easily accessible to everyone.

Gerd, it seems this regression[1] fell through the cracks. Could you
please take a look? Or is there a good reason why this can't be
addressed? Or was it dealt with and I just missed it?

[1] apparently caused by 5a838e5d5825c8 ("drm/qxl: simplify
qxl_fence_wait") [v5.13-rc1] from Gerd; for details see
https://lore.kernel.org/regressions/ZTgydqRlK6WX_b29@eldamar.lan/

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
Everything you wanna know about Linux kernel regression tracking:
https://linux-regtracking.leemhuis.info/about/#tldr
If I did something stupid, please tell me, as explained on that page.

#regzbot poke

On 24.10.23 23:39, Timo Lindfors wrote:
> Hi,
> 
> On Tue, 24 Oct 2023, Salvatore Bonaccorso wrote:
>> Thanks for the excelent constructed report! I think it's best to
>> forward this directly to upstream including the people for the
>> bisected commit to get some idea.
> 
> Thanks for the quick reply!
> 
>> Can you reproduce the issue with 6.5.8-1 in unstable as well?
> 
> Unfortunately yes:
> 
> ansible@...get:~$ uname -r
> 6.5.0-3-amd64
> ansible@...get:~$ time sudo ./reproduce.bash
> Wed 25 Oct 2023 12:27:00 AM EEST starting round 1
> Wed 25 Oct 2023 12:27:24 AM EEST starting round 2
> Wed 25 Oct 2023 12:27:48 AM EEST starting round 3
> bug was reproduced after 3 tries
> 
> real    0m48.838s
> user    0m1.115s
> sys     0m45.530s
> 
> I also tested upstream tag v6.6-rc6:
> 
> ...
> + detected_version=6.6.0-rc6
> + '[' 6.6.0-rc6 '!=' 6.6.0-rc6 ']'
> + exec ssh target sudo ./reproduce.bash
> Wed 25 Oct 2023 12:37:16 AM EEST starting round 1
> Wed 25 Oct 2023 12:37:42 AM EEST starting round 2
> Wed 25 Oct 2023 12:38:10 AM EEST starting round 3
> Wed 25 Oct 2023 12:38:36 AM EEST starting round 4
> Wed 25 Oct 2023 12:39:01 AM EEST starting round 5
> Wed 25 Oct 2023 12:39:27 AM EEST starting round 6
> bug was reproduced after 6 tries
> 
> 
> For completeness, here is also the grub_set_default_version.bash script
> that I had to write to automate this (maybe these could be in debian
> wiki?):
> 
> #!/bin/bash
> set -x
> 
> version="$1"
> 
> idx=$(expr $(grep "menuentry " /boot/grub/grub.cfg | sed 1d |grep -n
> "'Debian GNU/Linux, with Linux $version'"|cut -d: -f1) - 1)
> exec sudo grub-set-default "1>$idx"
> 
> 
> 
> -Timo
> 
> 
> 

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