Hi there,

As gentoo user, I've tried on a 2.6.25-gentoo-r7 kernel to change the preemption model and the Hz.

My computer is a Intel Core Quad 9550 on an Intel P45 chipset. The video is ATI HD4870 1Gb and the driver is fglrx 9.3. Xorg-server 1.5.3.

When setting to full preemptible @ 1000 hz, the system starts and everything runs fine.
But, when I tried Voluntary preemption @ 300 hz, the system crashed on X startup, leaving a graphical screen almost black with some BIOS boot post messages displayed here and there (sorry for this messy description of the problem, but it's rather hard to describe a crash).
The computer was still working on console mode, accessible with CTRL+ALT+F1.


So, my question is simple : is there any issue with the preemption model / Hz setting with fglrx ?
Some other people on Nvidia doesn't seem to have such issues. But perhaps my crash doesn't come at all from those kernel preemption settings.

Thanks for any information you may have.