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Bug#1080492: firmware-nonfree: [i915] With 20240709-2, the external monitors randomly blank for 2-3 seconds (regression)

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  Bug#1080492: firmware-nonfree: [i915] With 20240709-2, the external monitors randomly blank for 2-3 seconds (regression) Vincent Lefevre <vincent@vinc17.net> - 2024-09-05 02:30 +0200
    Bug#1080492: marked as done (firmware-nonfree: [i915] With  20240709-2, the external monitors randomly blank for 2-3 seconds  (regression)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-09-11 22:00 +0200

#83840 — Bug#1080492: firmware-nonfree: [i915] With 20240709-2, the external monitors randomly blank for 2-3 seconds (regression)

Source: firmware-nonfree
Version: 20240709-2
Severity: important

First, some context: I have a Dell laptop with 2 external monitors
connected via a dock. With 6.8+ Linux kernels, one of the external
monitors randomly blanks for 2-3 seconds (no such issue with earlier
kernels); not always the same monitor, but in most cases, not both
at the same time. I had reported the following bugs about this issue:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1072063
  https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11821

This blanking issue can occur several times per day.

After the upgrade of the binary packages of firmware-nonfree source
to 20240709-2, a new issue appeared: *both* external monitors randomly
blank for 2-3 seconds. Worse:
  * With a (non-Debian) 6.11.0-rc2+ test kernel (which I used in the
    context of the other bug), this issue occurs very often: up to
    several times per minute!
  * With the linux-image-6.7.12-amd64 Debian kernel, this issue also
    occurs (but not often), while this kernel does not have the bug
    mentioned above.

Downgrading to 20240709-1 made the issue disappear, at least with
the linux-image-6.7.12-amd64 Debian kernel (I have not tried the
6.11.0-rc2+ test kernel yet, but note that I was already using it
with 20240709-1 before September 2).

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'proposed-updates-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.7.12-amd64 (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=C.UTF-8, LC_CTYPE=C.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

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

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#83911 — Bug#1080492: marked as done (firmware-nonfree: [i915] With 20240709-2, the external monitors randomly blank for 2-3 seconds (regression))

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Your message dated Wed, 11 Sep 2024 21:51:14 +0200
with message-id <b6c1765608ca7bba47ee8b62b5a69ea337072a9f.camel@decadent.org.uk>
and subject line Re: firmware-nonfree: [i915] With 20240709-2, the external monitors randomly blank for 2-3 seconds (regression)
has caused the Debian Bug report #1080492,
regarding firmware-nonfree: [i915] With 20240709-2, the external monitors randomly blank for 2-3 seconds (regression)
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.)


-- 
1080492: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1080492
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems

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