Same results with NVIDIA drivers. No difference with different renderes.
I used 'top' to measure. X = 90%, dosbox = 9% When I skip framerates
X reduces CPU usage.
I feel that this could be a kernel 2.6 problem. Older dosbox used to work
fine on my RH9 (kernel 2.4).

>Are you using the latest video and sound drivers on the Linux version?
>Have you tried different output renderers and sound sampling rates?
>Have you tried disabling sound altogether? Are you testing with the exact
>same DOSBox configuration on Linux and Windows, or are you changing
>other settings besides cycles?
>
>Also, what program are you using to monitor "resource" usage in Linux?
>Does it actually say that your CPU is 0% idle?

X 90 procent
uhm do you happen to run on 24 display depth under linux ?

I have the same problem, running 2.6.9. Dosbox is always at 100% CPU, no matter how much I fiddle with sampling rates, CPU cycles, overlay/opengl/surface etc etc in dosbox.conf. Also tried on nVidia (on which ePSXe runs like a charm) and ATI cards. It worked fine before on a 2.4.something kernel. Even tried recompiling to no avail

> X 90 procent
>uhm do you happen to run on 24 display depth under linux ?

X was set to 24 depth colour. Changed to 16 depth colour.
X now uses 20% CPU. Thankyou.

I would like to know why 24 depth colour affects X and not WinXP.

I can't do 24 bpp color depth in WinXP on my system - it only supports 16 and 32. I haven't seen a card with 3D acceleration that could do 24 bpp color since the days of 3dfx.

I've seen some cards, like some ATi, do have both 24bpp and 32bpp selectable. I've always think about it more like a bug than anything else.