[CCing a few more people and lists that get_maintainers pointed out for qxl]
Hi, Thorsten here, the Linux kernel's regression tracker. Top-posting
for once, to make this easily accessible to everyone.
Thomas, from here it looks like this report that apparently is caused by
a change of yours that went into 6.10-rc1 (b33651a5c98dbd ("drm/qxl: Do
not pin buffer objects for vmap")) fell through the cracks. Or was
progress made to resolve this and I just missed this?
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 03.06.24 04:29, Kaplan, David wrote:
-----Original Message-----
From: Kaplan, David
Sent: Sunday, June 2, 2024 9:25 PM
To: tzimmermann@xxxxxxx; dmitry.osipenko@xxxxxxxxxxxxx; Koenig,
Christian <Christian.Koenig@xxxxxxx>; zach.rusin@xxxxxxxxxxxx
Cc: Petkov, Borislav <Borislav.Petkov@xxxxxxx>; regressions@xxxxxxxxxxxxxx
Subject: [REGRESSION] QXL display malfunction
Hi,
I am running an Ubuntu 19.10 VM with a tip kernel using QXL video and I've
observed the VM graphics often malfunction after boot, sometimes failing to
load the Ubuntu desktop or even immediately shutting the guest down.
When it does load, the guest dmesg log often contains errors like
[ 4.303586] [drm:drm_atomic_helper_commit_planes] *ERROR* head 1
wrong: 65376256x16777216+0+0
[ 4.586883] [drm:drm_atomic_helper_commit_planes] *ERROR* head 1
wrong: 65376256x16777216+0+0
[ 4.904036] [drm:drm_atomic_helper_commit_planes] *ERROR* head 1
wrong: 65335296x16777216+0+0
[ 5.374347] [drm:qxl_release_from_id_locked] *ERROR* failed to find id in
release_idr
I bisected the issue down to "drm/qxl: Do not pin buffer objects for vmap"
(b33651a5c98dbd5a919219d8c129d0674ef74299).
Fixing emails...sorry
The full guest .config and guest XML can be provided if desired. The guest
kernel has QXL support compiled in and the VM has
<video>
<model type="qxl" ram="65536" vram="65536" vgamem="16384"
heads="1" primary="yes"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01"
function="0x0"/> </video>
The host is Ubuntu 24.04 (stock) running QEMU version 8.2.2. The VM is run
under virt-manager 4.1.0. If other information would be helpful, just let me
know.
Thanks --David Kaplan
--David Kaplan