@Cyberbob, I'm in the same situation: SSD 840 EVO and Linux Mint 17.1 Mate Edition...
If you upgrade your 840 firmware you will need to rebuild a custom kernel with the proper ATA HORKAGE, as I do since the upgrade, or you will need to use libata.force=noncq (which I discourage). Don't know if and when the patch will be included in stock kernel, but the latest (3.13.0-37-generic) still have this problem... Hope for Mint 17.2 "Rafaela"... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1338706 Title: Samsung SSD 840 failed to get NCQ Send/Recv Log Emask 0x1 failed to set xfermode (err_mask=0x40) on upstream kernels >= 3.12 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338706/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs