[Bug 36007] [natty] system freezes on boot without disabling KMS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36007

--- Comment #7 from Gabor Lenart <spam at lgb.hu> 2011-04-06 03:36:19 PDT ---
> You might want to check if there is a problem with the
> mtrrs or pat setup on that kernel.  I recall similar issues years ago with
> toshiba laptops caused by the bios setting up the mtrrs wrong.

Hi, if it helps:

reg00: base=0x0fffe0000 ( 4095MB), size= 128KB, count=1: write-protect
reg01: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back
reg02: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back
reg03: base=0x0bff00000 ( 3071MB), size= 1MB, count=1: uncachable
reg04: base=0x100000000 ( 4096MB), size= 1024MB, count=1: write-back

It's with kernel cmdline radeon.modeset=0 otherwise I can't boot to get a
usable system because of the issue. It's a system with 4Gbyte of RAM, and PAE
kernel (to be able to use all of the RAM, and I don't want a 64 bit system on
this). But I've also tried non-pae kernel, and the result seems to be the same.

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