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E001754
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PostPosted: Fri Jun 26, 2009 9:42 pm    Post subject: [SOLVED] multi card reader Reply with quote

Hi there,

I've bought 2 different card readers : one is the AK-ICR-05 from AKASA manufacturer. This is a internal card reader.
The second one is a Sony MRW62E-S2, which is an external card reader.

Both ones are working great when it comes to read a compact flash.
But, when I try to insert an SDHC card, nothing happens.

So, I found that I need the SDHCI kernel module, in order to be able to read SD cards.
I've also understood that I would also need a special kernel module that will support the internal chipset of the multicard readers.

My question will be : how can I read somewhere the chipset found inside the card readers ?? lsusb, lshal, lspci or dmesg haven't given me any interesting information.
The only thing I know is the Akasa reader is using some Realtek chipset.
What part of kernel should I activate to be able to use one of those two readers ??

Thanks for any help


Last edited by E001754 on Sun Jun 28, 2009 2:40 pm; edited 1 time in total
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NeddySeagoon
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PostPosted: Fri Jun 26, 2009 11:44 pm    Post subject: Reply with quote

E001754,

These things are SCSI devices with multiple Logical Unit Numbers.
The CF Card is usually what you get when you don't scan all LUNs.

You need CONFIG_SCSI_MULTI_LUN=y in your kernel.
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pappy_mcfae
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PostPosted: Sat Jun 27, 2009 6:59 am    Post subject: Reply with quote

Also, to find the exact devices you have, send the results of lspci -n to this web site. Set up the drivers it tells you, and only those drivers. I compile those drivers (SD) into the kernel. That seems to work best for those with the devices.

Blessed be!
Pappy
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aidanjt
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PostPosted: Sat Jun 27, 2009 8:49 am    Post subject: Reply with quote

lsusb would be needed for those.

Also, just enable all the mmc drivers as modules, and let udev do it's thing.
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E001754
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PostPosted: Sun Jun 28, 2009 2:40 pm    Post subject: Reply with quote

NeddySeagoon wrote:
E001754,

These things are SCSI devices with multiple Logical Unit Numbers.
The CF Card is usually what you get when you don't scan all LUNs.

You need CONFIG_SCSI_MULTI_LUN=y in your kernel.


That was the part which was missing, as well as sdhci of course !
Both reader are working well now.

Huge thanks to all.
:D

Special thanks also to pappy_mcfae for the debian link that is very very usefull to find out what kernel module can handle a particular device.

Cheers.
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pappy_mcfae
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PostPosted: Sun Jun 28, 2009 7:18 pm    Post subject: Reply with quote

You're most welcome!

Blessed be!
Pappy
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