Same problem here on the latest Ubuntu, with Linux 2.6.32-22-generic kernel.
[ 18.957964] mmc0: Unknown controller version (2). You may experience problems. [ 18.958067] Registered led device: mmc0:: [ 18.958108] mmc0: SDHCI controller on PCI [0000:0a:06.2] using DMA With all the latest updates -- I/O Errors with O2Micro sdhci PCI MMC/SD host controller v2 https://bugs.launchpad.net/bugs/323159 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs