Remove support for 'auto'(-1) value of XV_SYNC_TO_VBLANK

We previously had a heurstic here where we would only sync to vblank
for windows that covered more than 25% of the screen. We don't need
this anymore since the new approach to sync, (WAIT_FOR_SCANLINE_WINDOW),
is not excessively costly for small windows.

1 files changed, 5 insertions, 4 deletions

diff --git a/man/intel.man b/man/intel.man
index ffe69a12..6ccacda1 100644
--- a/man/intel.man
+++ b/man/intel.man
@@ -451,10 +451,11 @@ You can use the "xvattr" tool to query/set those attributes at runtime.
 
 .SS "XV_SYNC_TO_VBLANK"
 XV_SYNC_TO_VBLANK is used to control whether textured adapter synchronizes 
-the screen update to the vblank to eliminate tearing. It has three 
-values 'auto'(-1), 'off'(0) and 'on(1). 'off' means never sync, 'on' means 
-always sync, no matter what size, and 'auto' means sync if the Xv image is 
-more than quarter of the pixels on the screen. The default is 'auto'(-1).
+the screen update to the vblank to eliminate tearing. It is a Boolean
+attribute with values of 0 (never sync) or 1 (always sync). An historic
+value of -1 (sync for large windows only) will now be interpreted as 1,
+(since the current approach for sync is not costly even with small
+video windows).
 
 .SS "XV_BRIGHTNESS"