This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1806335

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1806335

Title:
  Enable new Realtek card reader

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  USB Storage based Realtek card reader doesn't work, because the usb-storage 
module tries to use it in UAS mode instead of using "ums-realtek".

  [Fix]
  Add new IDs to ums-realtek driver.
  In addition to that, we add a new module knob, "enable_mmc=", to 
enable/disable MMC, as vendors may not pay MMC royalties. "enable_mmc" defaults 
to 1.

  [Test]
  After applying the patch, the card reader works, and verified "enable_mmc=" 
can enable/disable MMC support.

  [Regression Potential]
  Minimal. This SRU enables two specific card readers that don't work as UAS, 
the new module knob only introduces new behavior when enable_mmc=0.

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