Bug 64873

Summary:	[bug] Launching weston does not unblank the display
Product:	Wayland	Reporter:	Brian Lovin <brian.j.lovin>
Component:	weston	Assignee:	Wayland bug list <wayland-bugs>
Status:	VERIFIED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	ullysses.a.eoff
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Brian Lovin 2013-05-22 16:10:44 UTC

System Environment:
--------------------------
Distro: Ubuntu 12.04
Arch: x86_64
wayland (master) heads/master-0-g508dd69
fontconfig (master) 2.10.93-0-g8d54091
drm (master) heads/master-0-g8a88e34
mesa (master) heads/master-0-gff68f61
libxkbcommon (master) heads/master-0-ga392d26
pixman (master) heads/master-0-g2320f05
cairo (master) heads/master-0-g631bf29
weston (master) heads/master-0-gfe097f9
harfbuzz (master) heads/master-0-g6015263
glib (master) heads/master-0-gc9cc0be
atk (master) heads/master-0-gc71edfa
efl (master) heads/master-0-g3c618e5
elementary (master) heads/master-0-gc5c04e3
wfits (master) heads/master-0-g4377115

Detailed Description:
-----------------------------
If a screen is blanked (left to sit long enough for the timeout to take effect), and weston or weston-launch is executed, the screen is not unblanked.
That is to say, weston will launch and run but it will display nothing on the screen.


Steps to Reproduce:
----------------------------
1. Blank the terminal
 * From the terminal (tt1 or CTRL+ALT+F1) execute "setterm -blank force"
2. SSH into the machine and run weston or weston-launch
3. Observe bug.

Note that X11 does wake up the display, so this is just not on par with X.

Comment 1 Brian Lovin 2013-05-22 16:15:56 UTC

Also note that on some hardware with very deep sleep states (ivybridge specifically) when Weston is launched the following error is observed:
[14:26:17.489] queueing pageflip failed: Invalid argument

Comment 2 Ander Conselvan de Oliveira 2013-05-28 08:57:54 UTC

This seems to be a kernel issue. Can you test if the compiling it from the following tree fixes it for you?

git://people.freedesktop.org/~danvet/drm-intel drm-intel-fixes

The following commit on that tree should fix it:

commit	e3de42b68478a8c95dd27520e9adead2af9477a5
Author:	Imre Deak <imre.deak@intel.com>
Date:	2013-05-03 17:44:07 (GMT)

drm/i915: force full modeset if the connector is in DPMS OFF mode

Comment 3 U. Artie Eoff 2013-06-17 16:15:53 UTC

The workaround in http://cgit.freedesktop.org/wayland/weston/commit/?id=722a2d523c90c2315121ddff6a001de2fe6965e6 resolves this issue.

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