Weston can be put into a state where it appears Weston won't wake up from Idle using only touch events (the mouse will still wake Weston up) Steps to reproduce: 1. Start Weston using weston-launch and a low idle time: * weston-launch -- -i5 2. Allow Weston to go to idle 3. Wake Weston up using touch, but DO NOT press the green button to unlock Weston 4. Allow Weston to go idle again 5. Wake Weston up with a touch event 6. Notice that the monitor only displays black, even though the monitor is active. Also of note is that the monitor doesn't go back to sleep - wasting battery life extremely quickly and in a very confusing way. This was reproduced with the following stack: Fedora 19 wayland (master) 1.2.91-0-g4125367 drm (master) heads/master-0-g0f4452b mesa (master) heads/master-0-g6d29db7 weston (master) 1.2.91-0-g7799385
I wonder if this is related to bug 69759? I think if it is a single-touch device and you were able to do that first tap without moving the finger before releasing it then the bug would be triggered and any subsequent taps would be lost.
It turns out this bug has nothing to do with touch event handling because you can replicate the same problem if you try to wake up the compositor with the shift key instead.
Created attachment 86846 [details] [review] Set new state before emitting wake signal in weston_compsitor_wake The wake handler set up by the shell will try to unlock the screen which works by setting up an animation which fades in the display. The animation is started by first scheduling a repaint. Subsequent repaints are scheduled whenever the previous frame is finished. However in the case of the wake up signal the state is still WESTON_COMPOSITOR_SLEEPING when the animation is started. weston_output_schedule_repaint() ignores attempts to schedule a repaint if the compositor is sleeping which means the animation never gets run and will never complete. The animation gets unstuck and continues if anything else schedules a repaint after the state has been changed so the bug only gets hit in certain conditions. The first wake up creates the lock surface which causes a redraw when the first buffer is attached so the first wake up is always ok. A redraw can be triggered in the subsequent wake ups just by moving the mouse. A good way to trigger the bug is to try to wake up the compositor by pressing the shift key. If you let the compositor go back to sleep after waking it up without unlocking it, the second press of the shift key will not cause a redraw so the animation will not run and it won't fade in.
(In reply to comment #3) > Created attachment 86846 [details] [review] [review] > Set new state before emitting wake signal in weston_compsitor_wake Yup, that looks good - another great fix, Neil. commit 8b62e2043a721f4b6e6e409280f5acbde73e8dfa Author: Neil Roberts <neil@linux.intel.com> Date: Mon Sep 30 13:14:47 2013 +0100 Set new state before emitting wake signal in weston_compsitor_wake ...
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