libX11/XCB problems in Hardy

[Stefan Potyra]

Hi,

Am Samstag 21 Juni 2008 04:33:25 schrieb Bryce Harrington:
> A couple fairly subtle but serious issues have come to light in Hardy
> relating to XCB-enablement in libX11, and I wanted to send this note
> to notify of a pending change we'll push out once we have a bit more
> verification.
>
>
> 185311  locking assertion failure, xorg/libsdl (13 dupes)
>         Particularly afflicting OpenOffice.org users
>
>
> 232364  dbus-launch hangs at session start waiting on socket output in
> libxcb Particularly afflicting Xubuntu users
>
>
> Both issues have seemingly been traced to be related to and/or due to
> the enablement of XCB in libx11.  While we're not 100% certain libxcb is
> at fault here, in contacting XCB upstream it seems that locking issues
> are a known issue with the current version and re-architecting work is
> underway to resolve them.

Now this might be a red herring, and not related with this at all, but
I've been having troubles with xcb in FAUmachine with hardy as well. It turned 
out that file descriptors registered in blocking mode caused a hang in xcb 
(which wasn't a problem in gutsy yet). Relevant file is at [1], and the diff 
which solved it is [2].

If you think, that this might somehow be connected, and digging in that 
direction might bring us closer to the issue, I could try to boild down the 
relevant code parts to a minimal test case.

Cheers,
   Stefan.
--
[1]: 
<http://faumachine.informatik.uni-erlangen.de/cgi-bin/viewcvs.cgi/FAUmachine/lib/glue-gui-gtk.c?rev=1.6&view=markup>
[2]: 
<http://faumachine.informatik.uni-erlangen.de/cgi-bin/viewcvs.cgi/FAUmachine/lib/glue-gui-gtk.c?r1=1.5&r2=1.6>
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