These errors seem to indicate that either the drive or sata controller are defective:
[ 13.649232] ata1: link is slow to respond, please be patient (ready=0) [ 17.790930] ata1: COMRESET failed (errno=-16) [ 23.651669] ata1: link is slow to respond, please be patient (ready=0) [ 27.793364] ata1: COMRESET failed (errno=-16) [ 33.654107] ata1: link is slow to respond, please be patient (ready=0) [ 62.813890] ata1: COMRESET failed (errno=-16) [ 62.813914] ata1: limiting SATA link speed to 3.0 Gbps [ 67.835096] ata1: COMRESET failed (errno=-16) [ 67.835121] ata1: reset failed, giving up [ 68.842534] ata1: exception Emask 0x10 SAct 0x0 SErr 0xc00000 action 0x1 t4 [ 68.842561] ata1: irq_stat 0x0c000000, interface fatal error [ 68.842580] ata1: SError: { Handshk LinkSeq } Are you sure it works when you upgrade? Are you booting with any special kernel command line arguments? cat /proc/cmdline please. ** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1471119 Title: Samsung 840 Pro 512GB not recognized Status in linux package in Ubuntu: Incomplete Bug description: In order to get newer systemd version I installed 15.10. However the partition manager (using the server image) did not recognize the Samsung 840 Pro SSD. I was forced to go back and install 15.04, then upgrade to 15.10 and that worked without issues. Changing to a different tty and doing checking /dev/disk/by-id also shows no sign of the Sasmungs 840 Pro. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: ubiquity (not installed) ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1 Uname: Linux 3.19.0-22-generic x86_64 ApportVersion: 2.17.3-0ubuntu4 Architecture: amd64 CurrentDesktop: KDE Date: Fri Jul 3 08:47:27 2015 InstallCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-22-generic root=UUID=78220e78-a48e-4add-8268-b84e73d2b2cb ro rootflags=subvol=@ splash quiet pcie_aspm=force nomdmonddf nomdmonisw vt.handoff=7 ProcEnviron: LANGUAGE=en_US:de PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_CH.UTF-8 SHELL=/bin/bash SourcePackage: ubiquity UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1471119/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp