SRU JUSTIFICATION ================ EFFECT ====== Ricoh 1180:e823 does not recognize certain types of SD/MMC cards. - Buffalo SD 512MB dmesg: I/O error, dev mmcblk0, sector xxx - Kingston SD 2GB dmesg: I/O error, dev mmcblk0, sector xxx - Patriot Micro SDHC dmesg: I/O error, dev mmcblk0, sector xxx.
FIX === Lowering the SD base clock frequency from 200Mhz to 50Mhz fixes this issue. This solution was suggest by Koji Matsumuro, Ricoh Company, Ltd. TEST ==== Performance test results with various MMC and SD cards were posted to https://lkml.org/lkml/2011/7/11/381 and also part of the results attached to this bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/773524 Title: [Toshiba Tecra R850] SD card reader doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/773524/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
