[OpenJDK 2D-Dev] [PATCH] 6636469: Java Fullscreen Exclusive Mode not working with Xorg server 1.3.0 and above

Dmitri Trembovetski Dmitri.Trembovetski at Sun.COM
Thu Feb 28 16:55:54 UTC 2008

Dmitri Trembovetski wrote:
>   Hi Dan,
>   I have been preparing the fix for the integration into
>   openjdk6.
>   If you could put it into IcedTea that'd be beneficial
>   as well in case someone runs into a problem.
>   BTW, have you thought by any chance about the other part
>   of the problem - proper xinerama detection? On the newer X
>   servers we detect the xinerama extension (since it's always
>   present and active), and assume that the screens are under
>   xinerama. That leads to some nasty issues. I'm still not
>   quite sure how to do the detection properly.

   My current version of the detection fix adds this check:
              xinInfo = (*XineramaQueryScreens)(awt_display, &locNumScr);
-            if (xinInfo != NULL) {
+            if (xinInfo != NULL && locNumScr > XScreenCount(awt_display)) {

@@ -699,11 +710,12 @@
              (XineramaGetCenterHintFunc*)dlsym(libHandle, XineramaGetCenterHintName);

          if (XineramaSolarisFunc != NULL) {
              DTRACE_PRINTLN("calling XineramaGetInfo func on Solaris");
              if ((*XineramaSolarisFunc)(awt_display, 0, &fbrects[0],
-                                       &fbhints[0], &locNumScr) != 0)
+                                       &fbhints[0], &locNumScr) != 0 &&
+                locNumScr > XScreenCount(awt_display))
                  DTRACE_PRINTLN("Enabling Xinerama support");
                  usingXinerama = True;
                  /* set global number of screens */
                  DTRACE_PRINTLN1(" num screens = %i\n", locNumScr);

   The idea is that if xinerama is used XCountScreens should return 1,
   at the same time, if there's only one screen then we don't need
   to enable xinerama support either.

   But I'm still lacking proper environment to test this =(


>   Thanks,
>     Dmitri
> Dan Munckton wrote:
>> Hi Dmitri
>> On Fri, 2008-02-15 at 15:34 -0800, Dmitri Trembovetski wrote:
>>>    The good news is that we can probably integrate this fix into
>>>    the newly created 6open workspace so that the fix gets into
>>>    the major linux distros quickly.
>> Happily, I've been unable to recreate the weird mouse issue I noted on
>> any installation other than using a LiveCD build of Ubuntu. I'd really
>> like to get the patch into test builds to see what other people's
>> experience is with FSEM + Xorg 1.3, as I have limited hardware and OSes
>> here.
>> Is it worth trying to get the patch into the IcedTea versions first?
>> Is there anything else I can do to progress this for now?
>> Cheers
>> Dan

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