[Bug 94087] eDP panel exhibits sparse random noise and flickering (link issue), forcing DP DDI profile helps [Lenovo T450s]
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Thu Feb 11 09:36:50 UTC 2016
https://bugs.freedesktop.org/show_bug.cgi?id=94087
--- Comment #8 from Alexander Schremmer <alex at alexanderweb.de> ---
"You can always override the eDP voltage swing by setting a module parameter
i915.edp_vswing=2"
This was not working before the patch you attached for BDW. Now it should work.
I gathered a VBT of an older BIOS update for the same model (with a different
panel, maybe). How would I know that it also enforces normal vswing? To me,
block_27[0xec] seems all zero as well. Is not that used as a low_vswing
indicator?
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