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DVD Playback Quality Degrades if Other System Functions are Performed - KB Article - 138895




Playback Can Be Adversely Affected if Other System Functions Are Performed

When playing a DVD on a portable system, the playback can be adversely affected if other system functions are performed, such as changing video settings, altering performance options, or running diagnostics.



Stop Background Processes to Improve DVD Playback Quality

Playing a DVD can be a system resource-intensive operation. Multiple sub-systems are involved in the playback, including the video sub-system, the processor, memory (both virtual and physical), audio, and the I/O sub-system. For the playback quality of a DVD to be optimal, any other system resource-intensive operations should not be performed while playing the DVD. (Table 1)

Examples of system resource-intensive operations to be avoided while playing a DVD include, but are not limited to, the following operations:

System Resource-Intensive Operations Description
Power management functions Suspending a system while playing a DVD can result in various forms of corruption in the playback upon resume. Likewise, forcing a system into hibernate while a DVD is playing can result in corruption of the playback upon returning to the operating system. Generally, DVD player software disables power management time-outs during playback so these issues are not encountered. As a good practice, this feature should not be overridden to force the system into a power management state.
Changing video settings Changes to video settings should not be made while a DVD is playing. Attempting to change resolution, color depth, or the preferred display device while playing a DVD can result in problems affecting the quality of playback. These problems can include:
  • DVD overlay corruption (artifacts appearing on the DVD playback window)
  • Audio stuttering or skipping
  • Jerky or hesitant video
  • Out-of-sequence audio (the audio does not sync with the video).
Altering performance options Performance options should be set before playing a DVD. Making changes to the system performance options, including virtual memory settings and hardware acceleration, often require a system restart. Attempting to make these types of changes while playing a DVD may also result in corruption in the playback window.
Running diagnostics Diagnostic applications should not be run while playing a DVD. Dell Diagnostics, Virus or Spyware scanners, or the Microsoft embedded Scandisk utility are examples of Diagnostic Utilities that can cause DVD overlay corruption and slow playback as the system uses resources to perform the diagnostic.
Table 1: System Resource-Intensive Operations

Stopping these activities should result in better quality DVD playback.



 
Quick Tips content is self-published by the Dell Support Professionals who resolve issues daily. In order to achieve a speedy publication, Quick Tips may represent only partial solutions or work-arounds that are still in development or pending further proof of successfully resolving an issue. As such Quick Tips have not been reviewed, validated or approved by Dell and should be used with appropriate caution. Dell shall not be liable for any loss, including but not limited to loss of data, loss of profit or loss of revenue, which customers may incur by following any procedure or advice set out in the Quick Tips.

Artikel-id: SLN67057

Laatste wijzigingsdatum: 08/01/2010 12:00 AM


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