Bug 24140 - [855GM] clutter clicking is completely broken
Summary: [855GM] clutter clicking is completely broken
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Jesse Barnes
QA Contact: Xorg Project Team
Keywords: NEEDINFO
Depends on:
Reported: 2009-09-24 16:36 UTC by Diego Escalante Urrelo
Modified: 2010-04-05 14:46 UTC (History)
4 users (show)

See Also:
i915 platform:
i915 features:


Description Diego Escalante Urrelo 2009-09-24 16:36:54 UTC
Bug description:
On my 855 GM clutter is completely useless because its clicking detection method is based on some dark magic using pickling, this is broken on my card apparently. Clutter used to work fine here and reverting the pickling method change in clutter makes no difference, the problem seems to be in the driver.

System environment: 
-- chipset: 855 GM
-- system architecture: 32-bit
-- xf86-video-intel: a92bbcc94904684e7709b3ddaad82bc04607af26
-- xserver: 2:
-- mesa: 7.6.0~git20090817.7c422387-0ubuntu0
-- libdrm: 2.4.13-1
-- kernel: 2.6.31-rc6-686
-- Linux distribution: Debian unstable
-- Machine or mobo model: Thinkpad R50e
-- Display connector: LVDS

Reproducing steps:
1. Build clutter
2. Run tests/interactive/test-events
3. Hover over the elements and try clicking them
4. You see how the 'focus' is removed from red-square but does not move anywhere else, warnings are printed to console

Additional info:
This is the log for the clutter test:

Running ./test-interactive test-events 2

NOTE: For debugging purposes, you can run this single test as follows:
$ libtool --mode=execute \
          gdb --eval-command="b test_events_main" \
              --args ./test-interactive test-events

(test-events:8008): Clutter-CRITICAL **: clutter_id_pool_lookup: assertion `id < id_pool->array->len' failed
[stage] STAGE STATE *source*
[stage signal] activate
* captured event for type 'ClutterStage' *
[red box] KEY RELEASE '
'  *source*
[stage] KEY RELEASE '
(test-events:8008): Clutter-CRITICAL **: clutter_id_pool_lookup: assertion `id < id_pool->array->len' failed
(test-events:8008): Clutter-CRITICAL **: clutter_id_pool_lookup: assertion `id < id_pool->array->len' failed
(test-events:8008): Clutter-CRITICAL **: clutter_id_pool_lookup: assertion `id < id_pool->array->len' failed
Comment 1 Shuang He 2009-09-24 19:44:21 UTC
Fang Xun, could help testing this on 855GM
I have tried latest bits on 945GME, didn't met the issue:
Arch:		i386
Platform:	945GME	
Libdrm:		(master)ac71f0849928f4b2fbb69c01304ac6f9df8916a1
Mesa:		(mesa_7_6_branch)84c7afd9e0f2df72d90dd82d38384c4f2f45173e
Xserver:		(server-1.6-branch)507e57381fea6334f7dc8da6925e53d2c76fddcb
Xf86_video_intel:		(master)a92bbcc94904684e7709b3ddaad82bc04607af26
Kernel:       (master)74fca6a42863ffacaf7ba6f1936a9f228950f657
Comment 2 fangxun 2009-09-24 20:51:22 UTC
yes, this can be reproduced on 855GM.
Comment 3 Emmanuele Bassi (:ebassi) 2009-09-26 09:56:12 UTC
usually, any bug in the event handling for Clutter is the direct result of a malfunctioning glReadPixels(). in order to identify the scene graph element that originated the event, Clutter encodes each actor's unique id into a RGB value and renders the scene graph using those colors. in this case, the warning:

(test-events:8008): Clutter-CRITICAL **: clutter_id_pool_lookup: assertion `id
< id_pool->array->len' failed

means that the value extracted from the glReadPixels() output was not a valid id.
Comment 4 Vincent Untz 2009-10-07 03:09:33 UTC
FWIW, I'm experiencing this with the ati and radeonhd drivers too, on this card: ATI Technologies Inc M56GL [Mobility FireGL V5200]
Comment 5 Jesse Barnes 2009-11-20 14:12:23 UTC
Does this still happen with recent Mesa bits?  Note that the Intel and radeon bugs are separate since they use different paths to map pixels for readback.

Vincent, please file a separate bug.
Comment 6 Diego Escalante Urrelo 2009-11-21 10:33:15 UTC
On debian sid:

ii  libgl1-mesa-dev                      7.6-1                               
ii  libgl1-mesa-dri                      7.6-1                               
ii  libgl1-mesa-glx                      7.6-1                               
ii  libglu1-mesa                         7.6-1                               
ii  mesa-common-dev                      7.6-1                             
ii  mesa-utils                           7.6-1                              

ii  linux-image-2.6.31-1-686             2.6.31-1                            

ii  xserver-xorg-video-intel             2:2.9.0-1                           

ii  libdrm-dev                           2.4.14-1+b1                         
ii  libdrm-intel1                        2.4.14-1+b1                         
ii  libdrm2                              2.4.14-1+b1                         

ii  xserver-common                       2:1.6.4-2                           

Problem is still there. I can't test mesa from git right now.
Comment 7 Eric Anholt 2010-01-30 12:52:32 UTC
This is fixed in Mesa 7.7 with the change in sw fallback handling.
Comment 8 Diego Escalante Urrelo 2010-01-30 13:08:26 UTC
(In reply to comment #7)
> This is fixed in Mesa 7.7 with the change in sw fallback handling.

Indeed, thanks!.

Curious: sw fallback means this is not implemented by my hw? that it is implemented by my hw but it broke?
Comment 9 Richard Roman 2010-04-05 14:46:11 UTC
For all the folks that have to stay with the old MESA libs, a small workaround: set environment variable LIBGL_ALWAYS_SOFTWARE=1, and start your (clutter-based) application.

This will result in (much) slower speed, but the app will still work & it will be testable!

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