[Bug 73156] Dual onboard LCD (eDP1 and DP1) cannot turn on DP1 (no backlight), no backlight control but can see screen in reflected light

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73156

--- Comment #4 from Daiver <daiver at daiver.ru> ---
Found magic combination to make all LCD work:
- add i915.panel_ignore_lid=-2 to kernel boot params, full off laptop
- first boot with lid closed (turn on, BIOS turn on DP1, grub on DP1, got X11
desktop on DP1)
- second boot with lid opened (open lid, see backlight on eDP1, but no X11
desktop on eDP1, reboot, BIOS not run off DP1, but grub on eDP1)
- get all LCD worked

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20140101/f8dd906b/attachment.html>