Microsoft KB Archive/188303

= Random Stop 0x50 Errors on Cirrus Video Adapters =

Article ID: 188303

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition
 * Microsoft Windows NT Server 4.0 Enterprise Edition

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This article was previously published under Q188303





SYMPTOMS
On systems with some Cirrus-compatible video adapters, Windows NT may randomly and infrequently stop responding (hang) and report the following blue screen error message:

STOP 0x00000050 error

PAGE_FAULT_IN_NONPAGED_AREA.



CAUSE
The GDI in Windows NT requires 8-byte alignment on the bitmaps it is expected to draw on. Cirrus's driver provides 4-byte alignment instead of 8. This may cause problems on some video adapters where output requests are delivered to GDI.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Additional query words: cirus display driver Video capture

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB188303

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