DOCUMENT:Q58276 05-NOV-1999 [win95x] TITLE :8514-VGA: Switch to MS-DOS Prompt Gives White Screen PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:WINDOWS:3.0,3.0a,3.1,3.11 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows versions 3.0, 3.0a, 3.1, 3.11 ------------------------------------------------------------------------------- SUMMARY ======= If you are using an 8514 video adapter with a secondary VGA adapter on a 386 system (also referred to as a passthrough VGA), you may encounter problems when switching between MS-DOS virtual machines (VMs) in full screen mode. MORE INFORMATION ================ The problem can be easily identified with the following default configuration (using Program Manager as your shell): 1. Start Windows in 386 enhanced mode. 2. In Program Manager, start an MS-DOS virtual machine (VM) by selecting MS-DOS Prompt in the Main Group and pressing the ENTER key. 3. The MS-DOS VM starts full screen and presents you with the standard prompt. 4. Press ALT+ESC. The MS-DOS VM is reduced to an icon, and Program Manager is now the active application. 5. Press ALT+TAB (releasing the ALT key first). The icon for the MS-DOS Prompt is highlighted. When you releasing the ALT key, the MS-DOS VM appears in full screen mode. If the screen for the MS-DOS VM is all white, then the VGA card may have a problem with the DAC (digital-to-analog converter). You may want to either remove the VGA card from your system or contact the board manufacturer to see if there is a way for you to update your VGA adapter. NOTE: The display is correct if you run the MS-DOS VM in a Window (ALT+ENTER). To restore the display, type the following MS-DOS command at the MS-DOS command prompt, and then press ENTER: MODE CO80 Additional query words: 3.00 win30 3.00a 3.10 3.11 ====================================================================== Keywords : Technology : kbWin3xSearch kbZNotKeyword3 kbWin300 kbWin300a kbWin310 kbWin311 Version : WINDOWS:3.0,3.0a,3.1,3.11 ============================================================================= 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 1999.