XFree86 Video Timings HOWTO XFree86 Video Timings HOWTO Eric S. Raymond <[e-mail]>v3.2, 20 February 1998How to compose a mode line for your card/monitor combination under XFree86. The XFree86 distribution now includes good facilities for configuring most standard combinations; this document is mainly useful if you are tuning a custom mode line for a high-performance monitor or very unusual hardware. It may also help you in using xvidtune to tweak a standard mode that is not quite right for your monitor.1. Disclaimer2. Introduction3. How Video Displays Work4. Basic Things to Know about your Display and Adapter4.1 The monitor's video bandwidth:4.2 What these control:5. Interpreting the Basic Specifications5.1 About Bandwidth:5.2 Sync Frequencies and the Refresh Rate:6. Tradeoffs in Configuring your System7. Memory Requirements8. Computing Frame Sizes9. Black Magic and Sync Pulses9.1 Horizontal Sync:9.2 Vertical Sync:10. Putting it All Together11. Overdriving Your Monitor12. Using Interlaced Modes13. Questions and Answers14. Fixing Problems with the Image.14.1 The image is displaced to the left or right14.2 The image is displaced up or down14.3 The image is too large both horizontally and vertically14.4 The image is too wide (too narrow) horizontally14.5 The image is too deep (too shallow) vertically15. Plotting Monitor Capabilities16. Credits "