[Bug 101111] [Regression BDW] backlight flickering/display artifacting on Broadwell integrated graphics with 4.12-rc1

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Aug 11 18:54:09 UTC 2017


https://bugs.freedesktop.org/show_bug.cgi?id=101111

--- Comment #25 from Clinton Taylor <clinton.a.taylor at intel.com> ---
After examining the VBT file the most likely difference between panel type #14
and Panel type #0 is the backlight PWM frequency. Panel #14 has pwm frequency
defined at 200 Hz and Panel #0 has a frequency of 10000 Hz. The flicker most
likely observed by the user is backlight induced.

Other differences are DRRS mode and some panel power sequence differences.
Neither should cause a flicker after boot.

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