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A new Flyspray task has been opened. Details are below. User who did this - Micha? Kazior (kazik)
Attached to Project - awesome
Summary - Is Awesome too asynchronous? (window flickering, overlapping 
artifacts)
Task Type - Bug Report
Category - Core
Status - Unconfirmed
Assigned To - Operating System - Linux
Severity - High
Priority - Normal
Reported Version - 3.4.1
Due in Version - Undecided
Due Date - Undecided
Details - Hi,

Recently I've gone through an update on my box.

The problem is visible when I change the tag(s) - the windows that are meant to be 
displayed (I am using "max" layout) flicker when being painted, and the get 
eventually painted wrong. Sometimes a whole window (that should be beneath other windows) 
gets drawn on top of the others, sometimes just a small part of it does. When a window 
that is covered (but should've been on top of the window stack) repaints, it overlaps the 
existing 'image' and make the mess even bigger.

I attach a screen shot of what it looks like. The "mc" window painted itself slower, thus 
it ended up drawing over the "vmstat 1" which subsequently repainted itself by adding 
some new lines. This can get crazy when more windows is present, and more repainting is being done. 
It doesn't happen always, but quite often and is really annoying.

Specs:
- xserver 1.7.1
- awesome 3.4.1 (also tested git/master)
- multicore (core 2 duo)
- intel x3100 (gma965) / xf86-video-intel from git

Doing some random raise()/lower()/redraw() on tag changing doesn't help - it 
just worsens the flicker. The order of operations doesn't seem to have *any* 
relevance. The slower the window draws itself, the better the chance it will 
overlap other windows.

I suspect changes in the X/XCB/intel gfx that made things *really* 
asynchronous. Awesome actually doesn't care about when a xcb_map_window is 
completed. This issue may be less visible on a non-SMP systems. Shouldn't 
mapping/focusing be be somehow signalled when completed? Or is it just an X bug 
maybe?


Regards,
Micha? Kazior.

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http://awesome.naquadah.org/bugs/index.php?do=details&task_id=681

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