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Bug#1004125: Screen flickering with 2.4.109

Cross-posted to 2 groups.

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Package: libdrm-intel1
Version: 2.4.109-1
Severity: important
X-Debbugs-Cc: philipp@marek.priv.at


I got 2.4.109-1 a short while ago, and had old symptoms again --
screen flickering and kernel messages like

    i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful
    i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun

Switching monitor, cables, reboot, poweroff didn't help.

Downgrading libdrm-intel1 to 2.4.108-2 made the problems go away -
at least I could work now for 23 minutes, previously I had
flickering about every minute or so.



-- System Information:
Debian Release: bookworm/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.15.0-3-amd64 (SMP w/8 CPU threads)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8), LANGUAGE=de_AT:de
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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Bug#1004125: Screen flickering with 2.4.109  Philipp Marek <philipp@marek.priv.at> - 2022-01-21 12:20 +0100
  Bug#1004125: Screen flickering with 2.4.109 Philipp Marek <philipp@marek.priv.at> - 2022-01-21 13:00 +0100

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