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[Mathew Hodson <mathew.hodson@xxxxxxxxx>]

** Project changed: linux => ubuntu-translations

** Changed in: ubuntu-translations
   Importance: Medium => Undecided

** Changed in: ubuntu-translations
       Status: Invalid => New

** Changed in: ubuntu-translations
 Remote watch: freedesktop.org Bugzilla #92024 => None

** No longer affects: ubuntu-translations

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https://bugs.launchpad.net/bugs/1496163

Title:
  i915 firmware is not copied to initrd

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in initramfs-tools source package in Trusty:
  Fix Committed
Status in initramfs-tools source package in Vivid:
  Won't Fix
Status in initramfs-tools source package in Wily:
  Fix Released

Bug description:
  [ Impact ]

  On Skylake, skl_dmc firmware is not incorporated into the initramfs.
  This is because it is a symlink to a versioned blob and the initramfs-
  tools hook does not dereference symlinks. As the driver is actually
  loaded from the initramfs, the firmware is missing for the lifetime of
  the boot, which means that the GPU cannot enter its lowest available
  power states plus some hotplugging scenarios are broken. This all
  manifests itself as such in dmesg:

  [    0.728803] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1.bin failed with error -2
  [    0.728817] [drm:i915_firmware_load_error_print [i915]] *ERROR* failed to load firmware i915/skl_dmc_ver1.bin (0)

  [ Test Case ]

  After the fix has been applied and the initrd regenerates, the
  firmware should load successfully after a reboot.

  [ Regression Potential ]

  Unlikely, as the fix is part of Ubuntu since Wily.

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