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    AST RESEARCH, INC.          TECHNICAL BULLETIN # 1166               4-18-95

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    NO DPMS ON BRAVO MS P/75 AND OS/2 2.11

    PROBLEM

    The Bravo MS P/75 system may have no Data Power Management Signaling (DPMS)
    with OS/2 2.11 installed.  The hard drive may stop spinning but the display
    may not blank.  The following errors may also occur:

    1. Driver installation is not initially possible.  For example, during the
    install procedure, the install "SETUP" could not read the driver disk.

    2. During installation of OS/2.11, before OS/2 2.11 gets complete control and
    discards the video BIOS, the DPMS monitor will blank.

    CAUSE

    The APM and VAPM.SYS drivers are not compatible with the Cirrus Logic
    video BIOS.

    SYSTEMS AFFECTED
    AST PART NUMBER AND DESCRIPTION

    501701-XXX     BRAVO MS P75
    501702-XXX     BRAVO MS-L P75
    501703-XXX     BRAVO MS-T P75

    SOLUTION

    The solution to the above mention problem is to eliminate VAPM and APM.SYS
    from the CONFIG.SYS file.