Crashes on X Server [Linux kernel 2.6.30]

[Andrés Kanski <akanski@gmail.com>]

Dear Kernel Maintainers

Debian Kernel Team, Bastian Blank, Frederik Schueler & Maximilian Attems

   I write to tell us about an option in the kernel config that causes crashes on X server, specifically on ATI Rage video cards, a matter that is possibly able to crash another hardware according to the linux kernel configuration help. Well, the trouble is this line,

CONFIG_X86_PAT=y

Furthermore, the kernel help says,

config X86_PAT
        bool
        prompt "x86 PAT support"
        depends on MTRR
        ---help---
          Use PAT attributes to setup page level cache control.

          PATs are the modern equivalents of MTRRs and are much more
          flexible than MTRRs.

          Say N here if you see bootup problems (boot crash, boot hang,
          spontaneous reboots) or a non-working video driver.

          If unsure, say Y.

The problematic package is linux-image-2.6.30-1-686 on the testing branch 'squeeze'.

Regards and thank you so much for the attention.