Bug 28435

Summary: Composite broken in master
Product: xorg Reporter: Andrew Randrianasulu <randrik>
Component: Server/GeneralAssignee: Xorg Project Team <xorg-team>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: airlied
Version: git   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Bug Depends on:    
Bug Blocks: 27592    
Attachments:
Description Flags
Example of corruption
none
attempted fix. none

Description Andrew Randrianasulu 2010-06-07 23:42:58 UTC 
After 959a1eaf1c15a691141f1b0dc53757fe9b6e9b13 is the first bad commit
commit 959a1eaf1c15a691141f1b0dc53757fe9b6e9b13
Author: Dave Airlie <airlied@redhat.com>
Date:   Fri Jun 4 11:09:46 2010 +1000
    composite: use config notify hook to do pixmap resize.

i can see  corrupted windows with fbdev driver and e16 1.0.2 WM/compositor.

full bisect result:

----------------
959a1eaf1c15a691141f1b0dc53757fe9b6e9b13 is the first bad commit
commit 959a1eaf1c15a691141f1b0dc53757fe9b6e9b13
Author: Dave Airlie <airlied@redhat.com>
Date:   Fri Jun 4 11:09:46 2010 +1000

    composite: use config notify hook to do pixmap resize.
    
    Since reallocating the backing pixmap can fail, we need to try and do
    it before any other side effects of reconfiguring the window happen.
    
    This changes the ConfigNotify hook to return status, and moves the
    composite window reconfiguration wrappers to ConfigNotify. They all
    basically did the same thing, so we can drop the MoveWindow,
    ResizeWindow, ChangeBorderWidth wrappers, and allow ConfigNotify to do
    all the work. If reallocation fails we fail before we send any
    confiureNotify events, or enter the area we can't recover from.
    
    The only place we now enforce 32k limits are in EXA/UXA/fb, so drivers
    that don't use this should probably deal with it in their pixmap
    allocate if they don't already.
    
    This also breaks ABI, so we need an alternate fix for older servers,
    working on the X server makes me realise why I'm a kernel hacker.
    
    Signed-off-by: Dave Airlie <airlied@redhat.com>
    Reviewed-by: Keith Packard <keithp@keithp.com>
    Signed-off-by: Keith Packard <keithp@keithp.com>

:040000 040000 c9566220acea620ecb80402028e4435fa7d07ead a95979fe48f5c6ae58981647270cb12900610a81 M      composite
:040000 040000 b3d578a4ace90f20e2348f7a3d82254d4463ea83 ad4875747969b87cbe6229206919725244a4b67f M      dix
:040000 040000 0269478c902be265446636922d4996829c0a1cd6 0d07b0087277b0991d83943ae0048ed5b24dd681 M      hw
:040000 040000 49c82f6e4c707a7935a183f40843e2bfc14dbb9d 78d17f17d3f2238c31de01f885f6279792f39f7f M      include
Comment 1 Andrew Randrianasulu 2010-06-07 23:45:17 UTC 
Created attachment 36132 [details]
Example of corruption
Comment 2 Julien Cristau 2010-06-08 01:24:59 UTC 
cc:ing Dave.
Comment 3 Michel Dänzer 2010-06-08 02:36:45 UTC 
The commit in question changes the driver ABI. Did you rebuild the fbdev driver against the 'broken' xserver tree?
Comment 4 Andrew Randrianasulu 2010-06-08 06:17:21 UTC 
(In reply to comment #3)
> The commit in question changes the driver ABI. Did you rebuild the fbdev driver
> against the 'broken' xserver tree?

Yes, with simple make.
Comment 5 Andrew Randrianasulu 2010-06-15 09:54:30 UTC 
Just tried another driver, nouveau + xserver master (a41d6e9bffbe56cfa1c3b84388a3d9f5a982f1a9
Merge: 7e8f100 f4190fe
Author: Keith Packard <keithp@keithp.com>
Date:   Fri Jun 11 10:08:13 2010 -0700
    Merge remote branch 'dottedmag/for-keithp'
). 


Corruption still here, but i guess this bug appear only with e16's compositing, i can't see it with xcompmgr (but xcompmgr fails to draw shadows, tried it only as attempt to narrow  bug down)

X/fbdev still stops at:

[   116.792] (II) Initializing built-in extension COMPOSITE
[   116.792] (II) Initializing built-in extension DAMAGE
(and nothing more), but this is separate  problem ....
Comment 6 Dave Airlie 2010-06-20 22:43:43 UTC 
okay I've installed e16 on F13 and am having no luck reproducing this even on fbdev.

can you give me some ideas of the e16 composite/shadow/eterm background settings/theme etc, you are using.
Comment 7 Dave Airlie 2010-06-20 22:55:33 UTC 
and as usual 5 mins later I find something, shading/unshading windows seems to lead to it happening.
Comment 8 Dave Airlie 2010-06-20 23:29:29 UTC 
Created attachment 36396 [details] [review]
attempted fix.
Comment 9 Andrew Randrianasulu 2010-06-20 23:40:30 UTC 
(In reply to comment #8)
> Created an attachment (id=36396) [details]
> attempted fix.

Fixed issue for me
Comment 10 Keith Packard 2010-07-01 06:04:10 UTC 
Fixed in 82d41ada993d8cbdcdfea878d1a5b031afe4e593

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