eDP laptop screen does not come up until a suspend/resume cycle happens.
Bug #1070978 reported by
Robert Hooker
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Linux |
Fix Released
|
Medium
|
|||
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned |
Bug Description
Starting with the precise 3.2.0-32 kernel update, this laptop's eDP screen refuses to come up until the lid is closed and opened again triggering a suspend/resume cycle. I bisected this down to
which came in through the upstream 3.2.29 update that also exibits the problem. 3.2.32 is also affected, and reverting it fixes the issue. In the working case, it's using 6bpc (PIPEACONF: 0xc0000050 (enabled, active, 6bpc)) and in the broken case it's using 8bpc (PIPEACONF: 0xc0000000 (enabled, active, 8bpc)). I can't attach full logs because it is an unreleased machine, but I've attached a few sanitized ones.
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
tags: | added: blocks-hwcert-enablement |
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
status: | Confirmed → Triaged |
description: | updated |
Changed in linux: | |
importance: | Unknown → Medium |
status: | Unknown → Confirmed |
Changed in linux: | |
status: | Confirmed → Incomplete |
Changed in linux: | |
status: | Incomplete → Fix Released |
Changed in linux (Ubuntu): | |
status: | Triaged → Fix Released |
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Kernel with the revert commit that was used for testing.
http:// kernel. ubuntu. com/~sarvatt/ lp1070978/