Public bug reported:
A certain OEM laptop changed the panel type/vendor, and the change
regressed the driver causing a flickering image. The ODM has tools to
measure various values of the driver/panel combination, and determined
that some voltage levels were way too low to pass the spec. The process
to bisect the commits took weeks, so while it's technically possible
that this issue was fixed by a single commit (drm/i915: Ignore OpRegion
panel type except on select machines), we've also kept another 10
commits which upstream thought should help (and did, they improved the
measured values but not enough).
So, this backport carries all 11 commits from 4.8/4.9 that the ODM
verified to pass the tests.
** Affects: linux (Ubuntu)
Importance: High
Assignee: Timo Aaltonen (tjaalton)
Status: Triaged
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
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https://bugs.launchpad.net/bugs/1770565
Title:
[i915_bpo] Fix flickering issue after panel change
Status in linux package in Ubuntu:
Triaged
Bug description:
A certain OEM laptop changed the panel type/vendor, and the change
regressed the driver causing a flickering image. The ODM has tools to
measure various values of the driver/panel combination, and determined
that some voltage levels were way too low to pass the spec. The
process to bisect the commits took weeks, so while it's technically
possible that this issue was fixed by a single commit (drm/i915:
Ignore OpRegion panel type except on select machines), we've also kept
another 10 commits which upstream thought should help (and did, they
improved the measured values but not enough).
So, this backport carries all 11 commits from 4.8/4.9 that the ODM
verified to pass the tests.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1770565/+subscriptions
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