Juddery arrows

[Dave Wilson]

Hi all,

I'm using pydance under debian testing, and while it all works - and for the 
most part pretty smoothly - there is a regular judder to the arrows. They 
scroll perfectly smoothly for maybe half a second, then stop for a split 
second before resuming.

I'm not sure where to go with this, as it's clearly not plain CPU-bound 
performance problems. I'm using kernel 2.6.7, pydance 1.0.2, xfree-4.3.0, 
python-2.3.4 and psyco 1.2. The video card is an NVidia-based Abit Siluro 
Geforce MX 200. I've tried 24 and 16 bit colour.

I've tried using both the regular "nv" XFree86 driver and the binary nvidia 
driver, and both exhibit the same problems (though the binary driver is 
clearly working - tuxracer runs smooth as anything.) :) I've also tried 
reducing the number of processes running on the machine to a bare minimum; 
there is nothing that's obviously hogging the CPU at regular intervals.

Does anyone else encounter this? Is it an expected result? Anyone been able to 
remove it?

Best regards,
Dave