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Date:	Sun, 23 Nov 2008 22:24:03 +0000
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	Pierre Ossman <drzeus-list@...eus.cx>
CC:	"J.A. Magallón" <jamagallon@....com>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: Linux 2.6.27-git3: no SD card reader

Pierre Ossman wrote:
> On Tue, 14 Oct 2008 23:27:59 +0200
> "J.A. Magallón" <jamagallon@....com> wrote:
>
>
>   
>>> Have you tested more than one card?
>>>       
>> I have two (both unknown brands for me, but I write full names fwiw):
>> - One "MBA Executive HiSpeed SD", 2Gb
>> - One "takeMS SDHC card Class6",  8Gb
>>
>> Both give about 10Mb/s on read with hdparm under 2.6.27.
>>     
>
> And both work fine in one of the slots, but not the other?
>
>   
>>> What machine is this? 
>>>       
>> It's an Acer Aspire One. From what I have seen, there are two SD devices.
>> Both are capable to read SDHC cards, I have switched cards and they work
>> (or at the moment both are working as backwards-compatible in plain SD
>> mode, if that even exists...).
>>     
>
> The SD/SDHC distinction is all software, so the hardware doesn't really
> care.
>
>   
>> I call this half-working because I have to boot with a card inside a slot
>> to have it detected. If i boot without the card-in, it even dissapears from
>> lspci. This is just with the left SD inserted:
>>
>>     
>
> No idea why this occurs. I'd guess some ACPI voodoo. You're going to
> have to check with the PCI and/or ACPI guys to figure that part of the
> mystery out.
>   

This specific problem is what I thought Matthew's acpiphp patch would 
solve - see my comment 
<http://bugzilla.kernel.org/show_bug.cgi?id=11828#c1>.

If I've got this right, then this *specific* issue isnot a regression.

Matthew, if I have confused two similar issues, could you please help by 
explaining the differences?

Thanks
Alan
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