Mac OS 8.5 Technote: Part XVI

Copyright 1998 by Apple Computer, Inc. All Rights Reserved.

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Inside the System File (Continued)

Display Manager

The Display Manager manages changes in both the display settings and the arrangement of monitors attached to the computer.
  • With some display cards, resolutions that were marked as non-preset resolutions by the display card were not showing up in the recommended list of resolutions in the Monitors & Sound control panel. The Monitors & Sound control panel was checking the non-preset bit, while the Display Manager was not. The Display Manager would strip the lower timing and Monitors & Sound would strip the higher (not preset) timing so neither would appear in the timing list used to build the recommended list. The Display Manager now correctly observes the non-preset bit and the recommended list is built correctly.

  • In some cases, an unreadable character was appended to the end of some names returned by the Display Manager. This has been corrected.

  • A problem in the Display Manager and Monitors & Sound control panel that could cause a crash when a multiscan monitor was attached to a PowerBook has been corrected. This problem would occur upon waking a PowerBook when the monitor was disconnected during sleep if the PowerBook was put to sleep with the Monitors & Sound control panel open.

  • A problem on some machines where the display enabler would not load at startup if a smart display was plugged into the built-in monitor connector has been corrected.

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