DOCUMENT:Q139207 08-AUG-2001 [winnt] TITLE :S3 Driver Doesn't Correctly Support 72Hz on Some IBM PS/2 Models PRODUCT :Microsoft Windows NT PROD/VER:winnt:3.51 OPER/SYS: KEYWORDS:kbdisplay ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 3.51 - Microsoft Windows NT Server version 3.51 ------------------------------------------------------------------------------- SYMPTOMS ======== The S3 video driver included with Windows NT version 3.51 does not correctly implement the 72Hz refresh rate when used with the onboard S3 based video on IBM PS/2 Model 76i and Model 77i computers. Attempting to install the driver and invoking the "Test" option in the Display section of Control Panel results in the test bitmap appearing for a short time, after which the image degrades and the screen turns black. The driver functions correctly when a 60Hz refresh rate is selected. Depending on the capabilities of your monitor, you may or may not see this behavior. CAUSE ===== When Windows NT attempts to set the video mode to 72hz, it incorrectly sets it to 97hz Vertical and 75mhz Horizontal. The standard for 72hz is 72hz Vertical and 48mhz Horizontal. RESOLUTION ========== A new version of the S3.SYS driver is available which corrects this problem. It is available in the latest Service Pack for Windows NT version 3.51. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 3.51. This problem was corrected in the latest Windows NT 3.51 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K Additional query words: prodnt display ====================================================================== Keywords : kbdisplay Technology : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS351search Version : winnt:3.51 ============================================================================= 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. Copyright Microsoft Corporation 2001.