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341N/A

341N/A5039226 Whitebox animation causes Solaris desktop hang

341N/A

341N/AThis problem is caused by a dead lock between java_vm and Xserver:

341N/AXserver is grabbed by java_vm and waiting for XUngrabServer, java_vm

341N/Athought XUngrabServer was already sent and sends another dga lock

341N/Arequest to Xserver and blocked on that request. Here is what happened:

341N/Ajava_vm threads calls XGrabServer and XUngrabServer and then

341N/ASolaris_DGA_GetLock, it seems no problem, but the current

341N/AXUngrabServer requires a XSync call after XUngrabServer in MT

341N/Aenvironment to make sure Xserver is ungrabbed *before* new lock

341N/Arequests come in. Without this XSync, a dead lock may formed just like

341N/Athis case.

341N/A

1370N/Adiff --git a/src/UngrabSvr.c b/src/UngrabSvr.c

1370N/Aindex ea00848..cea7f99 100644

1370N/A--- a/src/UngrabSvr.c

1370N/A+++ b/src/UngrabSvr.c

1064N/A@@ -39,6 +39,9 @@ XUngrabServer (

341N/A GetEmptyReq(UngrabServer, req);

341N/A UnlockDisplay(dpy);

341N/A SyncHandle();

341N/A+ /* fix for bug 5039226: desktop hangs */

688N/A+ if (!dpy->synchandler)

341N/A+ XSync(dpy, 0);

341N/A return 1;

341N/A }

341N/A