[Bug 71584] Re: on screen display lags text typing

[Andrew Ash]

This has to do with how the OSD is created, in a sort of pseudo
transparency.  It takes a screenshot of the area under where the OSD
will appear and then sets that as its background.  Then, any changes
underneath the OSD, such as window changes or typing text, will not
appear until it goes away, since the screenshot is not dynamically
updated as things underneath it are updated.

I think KDE 4.0 hopes to address this, and dynamic transparency is also
a major goal of the XGL/AIGLX/Compiz direction we're seeing in linux.
Until that happens, I'm not sure that the transparency thing will be
resolved.

You mentioned that the problem appeared in the update from 1.4.4 to
1.4.3  Could you please explain this a bit more?  Thanks.

-- 
on screen display lags text typing
https://launchpad.net/bugs/71584