Comment 35 for bug 342096

Hi everyone!

This bug is still Ubuntu 14.04.3 nowadays. The SD card I'm using is for music (not my /home ^_^') and it have 64 GB, but it's annoying use the method I've found its working for me:
1. Remove SD card
2. Kill processes that use the SD card
3. Reinsert SD card
4. Start new processes that use the SD card

By the way, when starting to use the SD card this way, I did include it to fstab, but it brought me the system not starting on resume or power up, so currently I'm using the way described above.

The output from kernel is:

ૐ » ~ λ dmesg | tail -n 10
[87713.372892] mmcblk0: error -110 sending status command, aborting
[87713.372898] blk_update_request: I/O error, dev mmcblk0, sector 2050
[87713.372986] EXT4-fs (mmcblk0p1): unable to read superblock
[87790.817694] mmc0: card 59b4 removed
[87794.836239] mmc0: cannot verify signal voltage switch
[87794.955839] mmc0: new ultra high speed SDR50 SDXC card at address 59b4
[87794.956111] mmcblk0: mmc0:59b4 SD64G 59.0 GiB
[87794.959661] mmcblk0: p1
[87797.141293] EXT4-fs (mmcblk0p1): recovery complete
[87797.148999] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode. Opts: (null)
ૐ » ~ λ uname -a
Linux vaio 3.19.0-56-generic #62~14.04.1-Ubuntu SMP Fri Mar 11 11:03:15 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Any idea by these days? Some workaround? Some bug fix? Something out of kernel compilation?