linux-kernel - Re: Kernel 2.6.37 erroneously limiting to UDMA/33

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Message-ID: <4D2607E8.1040305@earthlink.net>
Date:	Thu, 06 Jan 2011 13:20:24 -0500
From:	Stephen Clark <sclark46@...thlink.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Kernel 2.6.37 erroneously limiting to UDMA/33

On 01/06/2011 08:47 AM, Alan Cox wrote:
> On Wed, 05 Jan 2011 13:33:49 -0500
> Stephen Clark<sclark46@...thlink.net>  wrote:
>
>    
>> Hello,
>>
>> Why is the kernel limiting me to udma/33 when the device says it can do
>> ata2.01: CFA: TRANSCEND, 20070831, max UDMA/66
>>
>> There is no cable the compact flash is a socket on the motherboard!
>>      
> The kernel follows the ATA detection rules. If you have an adapter wedged
> into the PATA socket one motherboard then it could well be either the
> adapter isn't UDMA/66 capable or is not properly supporting cable detect.
>
> You can force it with boot options.
>
> If the CF socket is directly wired to and part of the motherboard (ie
> it's part of the board configuration), then can you send me a dmidecode,
> lspci and lspci --vvxxx as we can patch up configurations that are fixed,
> but not user added adapters.
>
> Alan
>
>    
The cf flash socket is soldered directly to the mother board.
I am attaching the dmidecode for the mother board.

Thanks,
Steve

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View attachment "dmidecode.txt" of type "text/plain" (9141 bytes)