* PAT support (or lack of) for Pentium 3 CPU's
@ 2009-06-16 15:09 Brad Allen
2009-06-16 16:38 ` Alan Cox
2009-06-17 0:14 ` Robert Hancock
0 siblings, 2 replies; 3+ messages in thread
From: Brad Allen @ 2009-06-16 15:09 UTC (permalink / raw)
To: linux-kernel
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: PAT support (or lack of) for Pentium 3 CPU's
2009-06-16 15:09 PAT support (or lack of) for Pentium 3 CPU's Brad Allen
@ 2009-06-16 16:38 ` Alan Cox
2009-06-17 0:14 ` Robert Hancock
1 sibling, 0 replies; 3+ messages in thread
From: Alan Cox @ 2009-06-16 16:38 UTC (permalink / raw)
To: braddo; +Cc: linux-kernel
On Tue, 16 Jun 2009 08:09:04 -0700
"Brad Allen" <braddo@tranceaddict.net> wrote:
> 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?
Please ask Nvidia for support on their proprietary products. Only they
have all the code.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: PAT support (or lack of) for Pentium 3 CPU's
2009-06-16 15:09 PAT support (or lack of) for Pentium 3 CPU's Brad Allen
2009-06-16 16:38 ` Alan Cox
@ 2009-06-17 0:14 ` Robert Hancock
1 sibling, 0 replies; 3+ messages in thread
From: Robert Hancock @ 2009-06-17 0:14 UTC (permalink / raw)
To: braddo; +Cc: linux-kernel
On 06/16/2009 09:09 AM, Brad Allen wrote:
> 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.
What's the error(s) you are getting? PAT support was only added fairly
recently, so obviously the driver should not require it for operation.
^ permalink raw reply [flat|nested] 3+ messages in thread
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