Thank's Andy, I will submit my audio problem to nvidia soon. For my usb problem, I'm not using pnp bios, I know this tips, but it's not that.
And thank's for your reply.
For suexec : no, I'm not refering to video drivers but to nforce drivers, there is a new release ( 1.0-0256), on the nvidia web site, but don't use the link "Linux and FreeBSD Drivers", use menu.
AMD Athlon 64 3500+
Asus 6600 GT pciX
1024 Mo ddr 3200 Corsair