okasion wrote:
This has been a long problem with Compiz that NVIDIA never fixed,
intermittent performance problems such as hick ups; the problem is easily
reproducible moving the cursor while opening programs such as Firefox or
Evolution.
Until Compiz 0.3.4 this bug was fixed setting the __GL_YIELD environment
variable to "NOTHING" in Compiz environment.
the only thing that this changes (and is supposed to change) is to make
compiz responsive under high cpu load.
Since Compiz 0.3.6 setting the __GL_YIELD environment variable to
"NOTHING"
is not enough, but launching Compiz WITHOUT "--unredirect-rendering"
is also
needed to fix this. So whats the problem using direct-rendering? using
direct-rendering triggers the NVIDIA vterm switching bug, that makes the
screen keep black on vterm switching. If one clicks at the black
screen, a
hard reboot is needed; the only solution is to kill X and start it again.
Turn of sync to vblank this might be causing this.
Also, for some people like me, using --indirect-rendering gives better
performance than using direct rendering.
no its not!
if you use indirect rendering on nvidia the _GL_YIELD env variable will
gets ignored and the system will be almost unuseable under high load.
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