I have the same problem. After updating my Evo 840 to firmware EXT0DB6Q I got a lot of read errors (kernel 3.16.0-37), but the smart status did not show any errors logged. I currently run this drive in an older Thinkpad X201. Interestingly I was able to boot the system partially but it got hung up due to read errors in the middle of the process.
As an initial workaround I switched the controller from AHCI to compatibility before I found this bug report. Then I was able to boot the system without problems. Disabling the discard option in fstab made my system work in AHCI mode again. So I can definitely confirm it is related to trimming. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1449005 Title: trim does not work with Samsung 840 EVO after firmware update (EXT0DB6Q) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fstrim/+bug/1449005/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
