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[SupportGuy <1318218@xxxxxxxxxxxxxxxxxx>]

I have the same issue on my desktop computer that is configured to
suspend when inactive. There have two SATA disks and 1 PATA disk on this
box and only one disk seems to have issues while suspending. Desktop
hangs while suspending and needs a hard reset. Kernel message before
hang:

Apr 11 18:34:00 phoebe kernel: [46916.180338] ata3: exception Emask 0x40 SAct 0x0 SErr 0x800 action 0x7
Apr 11 18:34:00 phoebe kernel: [46916.180352] ata3: SError: { HostInt }
Apr 11 18:34:00 phoebe kernel: [46916.180363] ata3: hard resetting link
Apr 11 18:34:00 phoebe kernel: [46916.671824] ata3: softreset failed (device not ready)
Apr 11 18:34:00 phoebe kernel: [46916.671830] ata3: applying PMP SRST workaround and retrying
Apr 11 18:34:00 phoebe kernel: [46916.843775] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Apr 11 18:34:00 phoebe kernel: [46916.854172] ata3.00: configured for UDMA/133
Apr 11 18:34:00 phoebe kernel: [46916.867797] ata3: EH complete
Apr 11 20:12:15 phoebe kernel: [    0.000000] Initializing cgroup subsys cpuset

Disk having issues:
 *-disk
       description: ATA Disk
       product: WDC WD10EZEX-07Z
       vendor: Western Digital
       physical id: 0.0.0
       bus info: scsi@2:0.0.0
       logical name: /dev/sdb
       version: 80.0
       serial: WD-WCC1S0911072
       size: 931GiB (1TB)
       capabilities: gpt-1.00 partitioned partitioned:gpt
       configuration: ansiversion=5 guid=af7b25e8-6b9d-0363-6045-bd10f7b3f818 sectorsize=4096

Kernel version: Linux phoebe 3.13.0-49-generic #81-Ubuntu SMP Tue Mar 24
19:29:48 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Setting min_power in  /sys/class/scsi_host/host3/link_power_management_policy 
seems to work.

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https://bugs.launchpad.net/bugs/1318218

Title:
  SATA problems on MacBook Pro 11,1?

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I installed Ubuntu 14.04 next to MacOS following the guide at
  https://help.ubuntu.com/community/MacBookPro11-1/Saucy/

  Looking into dmesg, I constantlz get entries like
  [  276.380934] ata1: SError: { PHYRdyChg }
  [  276.380943] ata1: hard resetting link
  [  277.103527] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [  277.103999] ata1.00: unexpected _GTF length (8)
  [  277.104504] ata1.00: unexpected _GTF length (8)
  [  277.104507] ata1.00: configured for UDMA/33
  [  277.104629] ata1: EH complete
  [  277.206319] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
  [  277.206328] ata1: irq_stat 0x00400000, PHY RDY changed
  [  277.206333] ata1: SError: { PHYRdyChg }
  [  277.206343] ata1: hard resetting link
  [  277.927757] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [  277.928425] ata1.00: unexpected _GTF length (8)
  [  277.929040] ata1.00: unexpected _GTF length (8)
  [  277.929051] ata1.00: configured for UDMA/33
  [  277.929168] ata1: EH complete
  [  278.030944] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
  [  278.030952] ata1: irq_stat 0x00400000, PHY RDY changed
  [  278.030957] ata1: SError: { PHYRdyChg }
  [  278.030965] ata1: hard resetting link
  [  278.752008] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [  278.752582] ata1.00: unexpected _GTF length (8)
  [  278.753140] ata1.00: unexpected _GTF length (8)
  [  278.753147] ata1.00: configured for UDMA/33
  [  278.753231] ata1: EH complete
  [  278.853417] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
  [  278.853424] ata1: irq_stat 0x00400000, PHY RDY changed
  [  278.853427] ata1: SError: { PHYRdyChg }
  [  278.853434] ata1: hard resetting link
  [  279.576258] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [  279.576881] ata1.00: unexpected _GTF length (8)
  [  279.577417] ata1.00: unexpected _GTF length (8)
  [  279.577427] ata1.00: configured for UDMA/33
  [  279.577491] ata1: EH complete
  [  279.677753] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
  [  279.677762] ata1: irq_stat 0x00400000, PHY RDY changed
  [  279.677767] ata1: SError: { PHYRdyChg }
  [  279.677776] ata1: hard resetting link
  [  280.400449] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
  [  280.401147] ata1.00: unexpected _GTF length (8)
  [  280.401722] ata1.00: unexpected _GTF length (8)
  [  280.401733] ata1.00: configured for UDMA/33
  [  280.401809] ata1: EH complete
  [  280.502117] ata1: exception Emask 0x10 SAct 0x0 SErr 0x10000 action 0xe frozen
  [  280.502127] ata1: irq_stat 0x00400000, PHY RDY changed
  [  280.502132] ata1: SError: { PHYRdyChg }

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.47
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  markus     1663 F.... pulseaudio
   /dev/snd/controlC1:  markus     1663 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat May 10 19:33:44 2014
  HibernationDevice: RESUME=UUID=c71381d2-e2f3-4c96-94ea-57b8986afd08
  InstallationDate: Installed on 2014-05-09 (0 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Apple Inc. MacBookPro11,1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=7584bc70-893a-4291-a1cb-4680f5e09d22 ro libata.force=noncq quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/29/2013
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP111.88Z.0138.B03.1310291227
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-189A3D4F975D5FFC
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-189A3D4F975D5FFC
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP111.88Z.0138.B03.1310291227:bd10/29/2013:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:
  dmi.product.name: MacBookPro11,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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