This problem also shipped with openSUSE 10.3; however it is easily
fixed by doing a YaST Online Update (the patch to xorg-x11-libxcb
causes a warning to be displayed instead of terminating).
However, some applications still produce other errors related to xcb,
which the xorg-x11-libxcb update (and those fedora packages AFAIK) do
not resolve, such as:
xcb_lock.c:77: _XGetXCBBuffer: Assertion `((int) ((xcb_req) -
(dpy-request)) = 0)' failed.
These kinds of errors can be fixed by compiling a libX11 without xcb
entirely, and getting the desired app to use that particular libX11.so
by setting LD_PRELOAD appropriately. This forum thread has
instructions:
http://www.suseforums.net/index.php?showtopic=40371pid=208206mode=threadedshow=st=;
Hope this helps,
David
On Dec 3, 2007 9:05 PM, Jan Newmarch [EMAIL PROTECTED] wrote:
Hi
After lurking on this list for many years, it's time I contributed.
Sun's Java under FC 8 is broken, and no Java apps that use X11 will run.
Error is
xcb_xlib.c:50: xcb_xlib_unlock: Assertion 'c-xlib.lock' failed
Other distros may have the same problem.
Sun claim it is a bug with XCB. XCB claim it is a long-standing bug with
Java. Fedora won't include a workaround that just warns about broken locks
instead of stopping. The problem seems to be Java making Xlib calls in a
sequence not allowed under the Xlib replacement XCB.
The only workaround that actually seems to work for me so far has been to
download and install the rpms
libxcb-1.0-3.i_acknowledge_that_my_jdk_is_broken.fc9.i386.rpm and
ibxcb-devel-1.0-3.i_acknowledge_that_my_jdk_is_broken.fc9.i386.rpm from
http://ajax.fedorapeople.org/libxcb/. Then run Java with export
LIBXCB_ALLOW_SLOPPY_LOCK=1. This replaces libxcb.1.0.3 with a version that
only complains instead of barfing.
See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6532373,
https://bugs.freedesktop.org/show_bug.cgi?id=11390,
https://bugs.launchpad.net/sun-java/+bug/86103,
http://www.fedoraforum.org/forum/showthread.php?t=171763page=1, etc.
Cheers
Jan
--
Dr Jan Newmarch
IT Degree Course Leader
Box Hill Institute
Email: [EMAIL PROTECTED]
WWW: http://jan.newmarch.name
Tel: +61 4 0117 0509
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you think is fun and worthwhile, because otherwise
you won't do it well anyway. -- Brian Kernighan
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