home *** CD-ROM | disk | FTP | other *** search
- DOCUMENT:Q168748 [winnt]
- TITLE: Java Applets Cause IE 3.02 to Stop Responding w/ SP3
- PRODUCT: Microsoft Windows NT
- PROD/VER:4.00
- OPER/SYS:WINDOWS
- KEYWORDS:kbbug4.00 kbfile kbfix4.00
-
- --------------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT Workstation version 4.0
- - Microsoft Windows NT Server version 4.0
- - Microsoft Internet Explorer version 3.02
- --------------------------------------------------------------------------
-
- SYMPTOMS
- ========
-
- Internet Explorer version 3.02 may stop responding when connecting to a Web
- link that contains a Java application after you have installed Windows NT
- version 4.0 Service Pack 3. The application will stop responding only if
- the Display Properties Color Palette is set to True Color.
-
- CAUSE
- =====
-
- Windows NT version 4.0 Service Pack 3 contains an updated GDI that includes
- a fix for a problem when creating image lists on a True Color (32 bpp)
- display. This GDI change caused a regression where applications calling
- GetDIBits API for RGB colors on a True Color display received an invalid
- RGB color mask.
-
- The Java Virtual Machine included with Internet Explorer 3.02 calls
- GetDIBits when initializing the Display Palette. The Java Virtual Machine
- expects a signed RGB mask value larger than 0x80h and, if a value less than
- 0x80h is received, it doubles the mask value in a tight loop until it is
- large than 0x80h. Because Service Pack 3 returns an invalid RGB mask,
- sometimes the value is negative (for example, 0xffffffe0h), causing the
- Java Virtual Machine to loop forever and Internet Explorer to stop
- responding.
-
- It is important to note that the Java Virtual Machine should be treating
- the RGB Mask as an unsigned integer. There are some conditions where an ATI
- video card returns a valid RGB Mask value of 0xff000000h, causing the Java
- Virtual Machine to loop forever because it is not treating the mask as an
- unsigned integer. A separate fix for the Java Virtual Machine issue with
- ATI video cards in True Color will be available in Internet Explorer 4.0.
- The Java code is licensed from Sun Microsystems, Inc.
-
- WORKAROUND
- ==========
-
- Do not use the True Color palette in Display Properties.
-
- RESOLUTION
- ==========
-
- Win32k.sys was modified to return a valid RGB color mask on True Color
- display systems.
-
- STATUS
- ======
-
- Microsoft has confirmed this to be a problem in Windows NT version 4.0.
-
- A supported fix is now available, but has not been fully regression-tested
- and should be applied only to systems experiencing this specific problem.
- Unless you are severely impacted by this specific problem, Microsoft
- recommends that you wait for the next Service Pack that contains this fix.
- Contact Microsoft Technical Support for more information.
-
- The fix is also available for download on the Internet at the following
- URL:
- ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa
- /nt40/hotfixes-postSP3/java-fix
-
- ============================================================================
-
- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
- PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
- ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
- EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
- ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
- CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
- MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
- OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
- SO THE FOREGOING LIMITATION MAY NOT APPLY.
-