Comment 24 for bug 323159

I am experiencing the same error message on bootup.

Ubuntu 10.04 (lucid)
Dell Latitude E6510 w/Intel Core i5 and Intel graphics

$ dmesg | grep -i mmc
[ 0.786323] PCI: Using MMCONFIG at f8000000 - fbffffff
[ 10.473322] mmc0: Unknown controller version (2). You may experience problems.
[ 10.473437] Registered led device: mmc0::
[ 10.473475] mmc0: SDHCI controller on PCI [0000:03:00.1] using ADMA

$ lspci | grep SD
03:00.1 SD Host controller: Ricoh Co Ltd Device e822 (rev 03)