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[Markus Strobl <mstrobl2@xxxxxxxxx>]

*** This bug is a duplicate of bug 1338706 ***
    https://bugs.launchpad.net/bugs/1338706

Uwe: No, Windows will not update the SSD firmware by itself. Samsung has
a windows application for updates, but it has to be downloaded from
Samsung and executed.

You really should update the firmware though. I also bought my 840 about
a year ago and before updating the firmware noticed severe performance
degradation and a few corrupted files. Performance according to "hdparm
-t /dev/sda" was down to 60 MB/s. After the firmware upgrade performance
was restored to 516 MB/s.

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https://bugs.launchpad.net/bugs/1449005

Title:
  trim does not work with Samsung 840 EVO after firmware update
  (EXT0DB6Q)

Status in fstrim package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  Fix Released
Status in fstrim source package in Trusty:
  Invalid
Status in linux source package in Trusty:
  Fix Committed
Status in fstrim source package in Utopic:
  Invalid
Status in linux source package in Utopic:
  Fix Committed
Status in fstrim source package in Vivid:
  Invalid
Status in linux source package in Vivid:
  Fix Committed

Bug description:
  Hi,
  after updating Samsung SSD 840 EVO to the latest firmware (EXT0DB6Q) the fstream command doesn't work anymore. Besides, there are a lot of file system errors and "bad sectors" reports. The problem is certainly caused by Samsung's firmware but I reported it as a bug because in Windows TRIM works normally after the upgrade. I have attached an image uploaded by a user who is experiencing the same problem. If you execute the command "sudo fstrim /" the  console gets stuck. If you add that command in rc.local the boot is compromised. I really hope this problem could be solved.
  Thanks

  ===
  break-fix: - 6fc4d97a4987c5d247655a157a9377996626221a
  break-fix: - 9a9324d3969678d44b330e1230ad2c8ae67acf81

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