Hello,

  Thanks a lot Manan ! That worked indeed, here are the commands I run:

sudo setpci -s 07:05.1 0xCA=0x57 # Write Enable
sudo setpci -s 07:05.1 0xCB=0x02 # (MMC Disable)
sudo setpci -s 07:05.1 0xCA=0x00 # (Write Disable)

Actually the first two commands alone were enough to make my MMC card
work ! I don't know what the third commad is for, but I included it 
since it was on the site Manan quoted.

Note, the slot '07:05.1' may differ on your machine.

On Sun, Oct 28, 2007 at 04:24:23PM -0000, Manan wrote:
> I had the same issue of not being able to access MMC cards, but I just 
> discovered a fix on this blog:
> http://intr.overt.org/blog/?p=59
> Now the card reader supports MMC too! Maybe a feature release of 
> Ubuntu can now incorporate this fix into the kernel package, so that 
> one doesn't have to manually set the registers?

-- 
 أحمد المحمودي (Ahmed El-Mahmoudy)
  Digital design engineer
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Ricoh R5C822 - MMC cards not detected in built-in memory card reader
https://bugs.launchpad.net/bugs/111089
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