On Tue, 14 Oct 2008 23:27:59 +0200
"J.A. MagallÃn" <jamagallon@xxxxxxx> 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.