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Bug#1079536: linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380

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  Bug#1079536: linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380 William Yang <wyang-debian@wdyllc.com> - 2024-08-24 13:50 +0200
    Processed: Re: Bug#1079536: linux-image-6.9.7+bpo-amd64: debian  linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-09-01 19:40 +0200
    Bug#1079536: linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380 Ben Hutchings <ben@decadent.org.uk> - 2024-09-01 19:40 +0200
    Bug#1079536: marked as done (linux-image-6.9.7+bpo-amd64: debian  linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-03-22 14:30 +0100

#83661 — Bug#1079536: linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380

Package: linux-image-6.9.7+bpo-amd64
Version: 6.9.7-1~bpo12+1
Severity: important
X-Debbugs-Cc: wyang-debian@wdyllc.com

Dear Maintainer,

I am a moderately new Debian user with some UNIX and Linux experience.

Several months ago, I replaced my video card with a multihead card based on an
ARC A380 chipset, which I use do drive dual 4KUHD monitors.  In order to get
this to functionality working, I needed to move to a backported kernel to get
proper driver support. I used the command:

  sudo apt-get install -t bookworm-backports --install-recommends linux-image-
amd64

I recognize that this set me up to receive future kernel updates as well.  A
number of kernels, over several months worked correctly when added with "apt-
get dist-upgrade":

* linux-image-6.5.0-0.deb12.1-amd64:amd64 (6.5.3-1~bpo12+1)
* linux-image-6.5.0-0.deb12.4-amd64:amd64 (6.5.10-1~bpo12+1)
* linux-image-6.6.13+bpo-amd64:amd64 (6.6.13-1~bpo12+1)
* linux-image-6.7.12+bpo-amd64:amd64 (6.7.12-1~bpo12+1)

However, the most recent image (linux-image-6.9.7+bpo-amd64:amd64
(6.9.7-1~bpo12+1)) introduced a problem for my A380 card.

Once I rebooted using the new kernel, all video is dim, with missing letters in
window bars, menus, and in text windows.  In addition, large visual artifacts
would (without obvious pattern to me) appear on my screens, making the system
nearly unusable in the GUI.  Several times, I noticed that the screen seemed
frozen for periods of time (I noticed my updating-every-second gnome clock
applet did not update for periods of up to 12 seconds).  This affects only GUI
behavior -- at the text console and via SSH from another system, things
appeared normal.

Reverting from 6.9.7 back to 6.7.12 immediately eliminated this symptom,
leading me to believe the problem lies with 6.9.7.

My short term fix was to remove linux-image-amd64's backport package (which
removed the 6.9.7 kernel from my box, but left 6.7.12) and install the non-
backported linux-image-amd64 (6.1.x kernel).  This stabilized my system's
behavior after reboots.

However, a problem with the kernel video drivers for ARC A380 cards seems very
likely to become a problem for others, and does put me on a kernel on the fast
path to EOL.

I am unclear what additional information to provide you, though I'll happily do
what can be done to capture more information.



-- System Information:
Debian Release: 12.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.7.12+bpo-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-6.9.7+bpo-amd64 depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.142
ii  kmod                                    30+20221128-1
ii  linux-base                              4.9

Versions of packages linux-image-6.9.7+bpo-amd64 recommends:
ii  apparmor  3.0.8-3

Versions of packages linux-image-6.9.7+bpo-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  firmware-linux-free     20200122-1
ii  grub-pc                 2.06-13+deb12u1
pn  linux-doc-6.9           <none>

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#83795 — Processed: Re: Bug#1079536: linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380

Processing control commands:

> tag -1 upstream moreinfo
Bug #1079536 [src:linux] linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380
Added tag(s) moreinfo and upstream.

-- 
1079536: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1079536
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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#83796

[Multipart message — attachments visible in raw view] — view raw

Control: tag -1 upstream moreinfo

On Sat, 2024-08-24 at 07:41 -0400, William Yang wrote:
> Package: linux-image-6.9.7+bpo-amd64
> Version: 6.9.7-1~bpo12+1
> Severity: important
> X-Debbugs-Cc: wyang-debian@wdyllc.com
> 
> Dear Maintainer,
> 
> I am a moderately new Debian user with some UNIX and Linux experience.
> 
> Several months ago, I replaced my video card with a multihead card based on an
> ARC A380 chipset, which I use do drive dual 4KUHD monitors.  In order to get
> this to functionality working, I needed to move to a backported kernel to get
> proper driver support. I used the command:
> 
>   sudo apt-get install -t bookworm-backports --install-recommends linux-image-
> amd64
> 
> I recognize that this set me up to receive future kernel updates as well.  A
> number of kernels, over several months worked correctly when added with "apt-
> get dist-upgrade":
> 
> * linux-image-6.5.0-0.deb12.1-amd64:amd64 (6.5.3-1~bpo12+1)
> * linux-image-6.5.0-0.deb12.4-amd64:amd64 (6.5.10-1~bpo12+1)
> * linux-image-6.6.13+bpo-amd64:amd64 (6.6.13-1~bpo12+1)
> * linux-image-6.7.12+bpo-amd64:amd64 (6.7.12-1~bpo12+1)
> 
> However, the most recent image (linux-image-6.9.7+bpo-amd64:amd64
> (6.9.7-1~bpo12+1)) introduced a problem for my A380 card.
[...]

Can you test whether this is resolved with the latest backports version
(linux-image-6.10.6+bpo-amd64)?

If not, please report the issue upstream, following
<https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html>.
Note that we don't make any changes to the drm subsystem or i915
driver, so it should be OK to do this despite running a distribuion
kernel.  Do let us know the URL of the issue you open, so we can keep
track of it.

(We ask you to do this yourself because the upstream developers will
likely need to ask you more questions.)

Ben.

-- 
Ben Hutchings
Q.  Which is the greater problem in the world today,
    ignorance or apathy?
A.  I don't know and I couldn't care less.

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#86545 — Bug#1079536: marked as done (linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380)

[Multipart message — attachments visible in raw view] — view raw

Your message dated Sat, 22 Mar 2025 14:23:34 +0100 (CET)
with message-id <20250322132334.ED6E4BE2DE0@eldamar.lan>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #1079536,
regarding linux-image-6.9.7+bpo-amd64: debian linux-image-amd64 / 6.9.7+bpo video problems on multiheaded Intel ARC 380
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
1079536: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1079536
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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