Public bug reported: 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
http://kernel.ubuntu.com/git?p=ubuntu/ubuntu- precise.git;a=commit;h=d3f281cf0493885d92ffc8e2c9e7e4e6d838d6a5 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)) for the eDP display. I can't attach full logs because it is an unreleased machine, but I've attached a few sanitized ones. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: precise regression-update ** Attachment added: "dmesg-3.2.0-32.txt" https://bugs.launchpad.net/bugs/1070978/+attachment/3412205/+files/dmesg-3.2.0-32.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1070978 Title: eDP laptop screen does not come up until a suspend/resume cycle happens. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1070978/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
