[Bug 1496163] Re: i915 firmware is not copied to initrd

[Steve Langasek]

Hello Jason, or anyone else affected,

Accepted initramfs-tools into trusty-proposed. The package will build
now and be available at https://launchpad.net/ubuntu/+source/initramfs-
tools/0.103ubuntu4.6 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: initramfs-tools (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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

Title:
  i915 firmware is not copied to initrd

Status in Linux:
  Invalid
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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