MTRR vs. PAT and Intel Graphics

Bruce Perens bruce at
Fri Jun 1 12:58:50 PDT 2007

Jesse Barnes wrote:
> Wow, that looks like some sort of best fit algorithm gone horribly 
> wrong. :)  It doesn't even create a new uncachable window for the QST 
> fan control (which is presumably ACPI or SMM based).  Have you reported 
> this to your BIOS vendor?
Yes. They said "This has not been reported on Windows, can you try it 
with that?" They didn't show much interest in repairing a Linux-specific 

I have a ROM upgrade to try. If that doesn't fix it, I might ask you for 
a bit of corroboration the next time I correspond with them.



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