linux-kernel - PAT support (or lack of) for Pentium 3 CPU's

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Message-Id: <20090616080904.CCA17C3A@resin11.mta.everyone.net>
Date:	Tue, 16 Jun 2009 08:09:04 -0700
From:	"Brad Allen" <braddo@...nceaddict.net>
To:	<linux-kernel@...r.kernel.org>
Subject: PAT support (or lack of) for Pentium 3 CPU's

It has come to my attention that PAT support has been disabled for P3 CPU's in kernel versions 2.6.30 and later due to a bug in the CPU. 

I have attempted to get the NVIDIA proprietary drivers working with these kernel versions and 3 different Pentium 3 motherboards, all have failed. The drivers seem to require PAT support in order to work correctly, each board has in fact produced a different error when using only MTRR.

Can a kernel option be added to enable/disable PAT for P3 CPU's? Or is there any possible workaround for the bug?

I'd be interested to hear from Radeon users running a 2.6.30 or later kernel.

For anyone wondering why I still use such an old machine, I require ISA support.

Cheers,

Brad Allen
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