tags 402165 + patch tags 414535 + patch thanks I worked with jcristau and christoph4 via IRC on #debian-x, and we managed to track down the problem with broken locking in Sun Java 1.5 and 1.6. It only occurs if Java finds the Xinerama extension, at which point it does something broken with locking and triggers the assertion. If Java never finds the Xinerama extension, it doesn't trigger the assertion for broken locking.
The following workarounds address this problem: For sun-java5-bin: sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/java-1.5.0-sun-1.5.0.11/jre/lib/i386/xawt/libmawt.so For sun-java6-bin: sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/java-6-sun-1.6.0.00/jre/lib/i386/xawt/libmawt.so The same fix (applied to the appropriate file) might work for other proprietary JDKs. Would the Debian maintainers of sun-java5-bin and sun-java6-bin please consider applying these workarounds to the packages, to avoid locking assertion failures when libx11-6 with Xlib/XCB enters unstable? - Josh Triplett
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