Ok it seems to work fine with 3.8.0-030800rc4-generic, forget my prevous comment I wasnt running the correct kernel.
This I tested on a fujitsu u772 with the RTS5229 PCI Express Card Reader, I can read and write to the SDCard. Te only this I see is the Invalid Allocation Unit size message from the kernel, but it works so far ok. [ 3355.880307] mmc0: SD Status: Invalid Allocation Unit size. [ 3355.881424] mmc0: new SD card at address 9ffc [ 3355.881770] mmcblk0: mmc0:9ffc SD01G 968 MiB [ 3355.883203] mmcblk0: p1 [ 3366.263451] mmc0: card 9ffc removed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1057089 Title: [Lenovo L530, 430, E49, K29, E535, E435, S430]: Media card reader [10ec:5229] does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1057089/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs