https://bugs.freedesktop.org/show_bug.cgi?id=74628
Priority: medium
Bug ID: 74628
CC: intel-gfx-bugs at lists.freedesktop.org
Assignee: intel-gfx-bugs at lists.freedesktop.org
Summary: [eDP regression] blank screen on boot
QA Contact: intel-gfx-bugs at lists.freedesktop.org
Severity: blocker
Classification: Unclassified
OS: All
Reporter: chris at chris-wilson.co.uk
Hardware: Other
Status: NEW
Version: XOrg CVS
Component: DRM/Intel
Product: DRI
>From Patrik Jakobsson
[http://lists.freedesktop.org/archives/intel-gfx/2014-February/039628.html]
Starting with this patch I get a blank screen when booting my MacBook Air 6,2.
Reverting only this patch on top of 3.14-rc1 doesn't help so it's most likely
the entire series that needs to be looked at.
Doing a suspend/resume fixes the problem.
commit 90791a5c644e2e06cadfe4f37de8ca81483e3a72
Author: Paulo Zanoni <paulo.r.zanoni at intel.com>
Date: Fri Dec 6 17:32:42 2013 -0200
drm/i915: fix VDD override off wait
If we're disabling the VDD override bit and the panel is enabled, we
don't need to wait for anything. If the panel is disabled, then we
need to actually wait for panel_power_cycle_delay, not
panel_power_down_delay, because the power down delay was already
respected when we disabled the panel.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
Reviewed-by: Jesse Barnes <jbarnes at virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
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