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[Tim Gardner <tim.gardner@xxxxxxxxxxxxx>]

** Also affects: linux (Ubuntu Utopic)
   Importance: Undecided
       Status: Confirmed

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Trusty)
       Status: New => Fix Committed

** Changed in: linux (Ubuntu Utopic)
       Status: Confirmed => In Progress

** Changed in: linux (Ubuntu Utopic)
     Assignee: (unassigned) => dann frazier (dannf)

** Patch added: "Trusty: ahci_xgene: Removing NCQ support from the APM X-Gene SoC AHCI SATA Host Controller driver"
   https://bugs.launchpad.net/ubuntu/utopic/+source/linux/+bug/1358498/+attachment/4181601/+files/0001-ahci_xgene-Removing-NCQ-support-from-the-APM-X-Gene-.patch

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https://bugs.launchpad.net/bugs/1358498

Title:
  ahci-xgene falsely advertises NCQ support

Status in “linux” package in Ubuntu:
  In Progress
Status in “linux” source package in Trusty:
  Fix Committed
Status in “linux” source package in Utopic:
  In Progress

Bug description:
  [IMPACT]
  ahci-xgene doesn't support NCQ but it sets this flag. This causes SATA failures that surface as a filesystem being remounted read-only due to errors when using a disk that supports NCQ.
  [TEST CASE]
  Do a network boot install on an X-Gene system with an SSD drive that supports NCQ. The install will fail and dmesg will show the filesystem being remounted read-only.
  [Regression Potential]
  Minimal; we're turning off a feature that is known broken.

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