Synchronization with CRT refresh

[Jon Smirl]

Does each head have it's own vsync interrupt on your hardware? If so
this is an X problem and X is only listening to one vsync interrupt
and updating both displays. The radeon chips I am working on supports
two vsync interrupts.

I only see two solutions:
1) synchronize sync and use one interrupt
2) don't synchronize and use two interrupts, update each screen on
it's appropriate interrupt.


-- 
Jon Smirl
jonsmirl at gmail.com