Messages in this thread | | | Date | Wed, 6 Aug 2008 15:51:14 +0200 | From | Andreas Herrmann <> | Subject | Re: AGP and PAT (induced?) problem (on AMD family 6) |
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On Mon, Aug 04, 2008 at 06:30:32PM +0200, Rene Herman wrote: > What _does_ solve this though is booting with the "nopat" command line > parameter. I'm on 2.6.26.1 and have enabled PAT for my AMD Duron myself. > With "nopat", there's no problem to be seen anymore -- exiting X > specifically is instantaneous. > > With or without PAT, my /proc/mtrr is always: > > reg00: base=0x00000000 ( 0MB), size= 512MB: write-back, count=1 > reg01: base=0x20000000 ( 512MB), size= 256MB: write-back, count=1 > reg02: base=0xe8000000 (3712MB), size= 64MB: write-combining, count=1 > > under X joined by: > > reg03: base=0xe4000000 (3648MB), size= 32MB: write-combining, count=2
To get some more debug data, can you please retest with latest kernel (2.6.27-rc2) using "debugpat" kernel option and provide dmesg output plus contents of <debugfs>/x86/pat_memtype_list?
Thanks,
Andreas
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