15. Feb 2009
Using the latest kernel from repo - 2.6.27-11-generic
Upon inserting the 4GB SDHC card, (although the card gets mounted) dmesg still 
shows I/O errors.
I didn't bother testing it any further.

[ 2702.737466] mmc0: new high speed SDHC card at address 0002
[ 2702.799657] mmcblk0: mmc0:0002 SD    3948544KiB 
[ 2702.799765]  mmcblk0: p1
[ 2702.954748] mmcblk0: error -110 transferring data
[ 2702.954767] end_request: I/O error, dev mmcblk0, sector 7897024
[ 2702.954779] Buffer I/O error on device mmcblk0, logical block 987128
[ 2703.084883] mmcblk0: error -110 transferring data
[ 2703.084900] end_request: I/O error, dev mmcblk0, sector 7897024
[ 2703.084911] Buffer I/O error on device mmcblk0, logical block 987128
[ 2703.215208] mmcblk0: error -110 transferring data
[ 2703.215227] end_request: I/O error, dev mmcblk0, sector 96
[ 2703.215238] Buffer I/O error on device mmcblk0, logical block 12
[ 2703.345403] mmcblk0: error -110 transferring data
[ 2703.345421] end_request: I/O error, dev mmcblk0, sector 104
etc..

Inserting a 2GB SD card works fine.

[ 2878.832285] mmc0: card 0002 removed
[ 2897.173584] mmc0: new high speed SD card at address 0002
[ 2897.176833] mmcblk0: mmc0:0002 SD    1993728KiB 
[ 2897.176932]  mmcblk0: p1

-- 
Ricoh R5C822 SDHC Card reader I/O errors
https://bugs.launchpad.net/bugs/247819
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