Xinerama - multiple monitors

VidModeExtenions - change mode for each monitor and size of screen

history of X:

• number of screens fixed at server startup
• can’t move window between screens (windows; pixmaps)
• resources per screen

Xinerama

• move application between screen
• resources duplicated for every monitor - resource hungry
• not dynamic
• windows duplicated for each screen (byt only visible on one)

XFree86

• VidModeExtension
• Shift+Alt+[+-]

Multiple graphics cards should be supported

RandR

• rotate screen
• landscape to/from portrait
• size changes need to be exposed to applications
• no rotation in XFree86 (would have required driver changes)
• Static

5 versions of xinerama in CVS repository (each driver, etc)

Virtual screen - “real screen”

• displays map and display sections from the virtual screen
• Max size 2048x2048 - xaa limit

Problems

• XAA - stale
• DRI separate memory management