For a permanent workaround, create the file  /etc/modprobe.d/ums-
realtek.conf with the following content:

options ums_realtek ss_en=0

or execute this command:

sudo sh -c 'echo "options ums_realtek ss_en=0" > /etc/modprobe.d/ums-
realtek.conf'

I think this bug could be declared fixed once the ss_en option is
disabled by default. This can be done either by shipping a modprobe
conffile or by changing the default value of the option in the kernel
source.

The 'ss_en' switch controls 'selective suspend', e.g. suspending parts
of the card reader which are not used. Typically only one card slot is
in use at any time, so disabling would slightly decrease power
consumption when a card is inserted. When there is no card, the reader
would power down through the normal USB suspend mechanism.

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https://bugs.launchpad.net/bugs/925760

Title:
  Constant warnings from the kernel: Test WP failed, assume Write
  Enabled

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