Comment 21 for bug 1153618

Appears to still have issues on 15.04 with SDXC Cards

Insert vfat formatted card and create a new file. Then eject card.

[ 1214.355115] mmc0: cannot verify signal voltage switch
[ 1214.467278] mmc0: new ultra high speed SDR104 SDXC card at address 0007
[ 1214.474164] Driver 'mmcblk' needs updating - please use bus_type methods
[ 1214.474277] mmcblk0: mmc0:0007 SD64G 58.2 GiB
[ 1214.476144] mmcblk0: p1
[ 1224.953923] mmcblk0: timed out sending r/w cmd command, card status 0x400900
[ 1225.053874] mmcblk0: timed out sending r/w cmd command, card status 0x400900
[ 1231.207667] mmcblk0: timed out sending r/w cmd command, card status 0x400900
[ 1235.642101] mmcblk0: timed out sending r/w cmd command, card status 0x400900
[ 1240.232505] mmc0: card 0007 removed

Getting the same r/w kernel errors when writing to the card as RHEL7 and Fedora 21. Ejected card is corrupted and needs re-formatting

This bug has been confirmed on two Lenovo T440s laptops