Hi!
Hopefully the right addressee.
Encountered two bad backports which cause screen-flicker.
dmesg shows:
...
[drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun
[drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
[drm:ironlake_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder B FIFO underrun
...
CPU: Intel Core i3 (Clarkdale/Ironlake)
The backports are:
- diff --git a/drivers/gpu/drm/i915/intel_pm.c
b/drivers/gpu/drm/i915/intel_pm.c
index 49de476..277a802 100644
- diff --git a/drivers/gpu/drm/i915/intel_drv.h
b/drivers/gpu/drm/i915/intel_drv.h
index a19ec06..3ce9ba3 100644
After reversing them the flicker is gone, no more messages in dmesg. All
else OK so far.
I have also reported this here:
https://bugs.freedesktop.org/show_bug.cgi?id=103796
So long!
Rainer Fiebig
--
The truth always turns out to be simpler than you thought.
Richard Feynman