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On 2015-09-16T17:00:39+00:00 Timo Aaltonen wrote:

Booting 4.3-rc1 or nightly on SKL-S results in

[    1.139104] [drm:i915_dump_device_info] i915 device info: gen=9, pciid=0x1912 rev=0x06 flags
=need_gfx_hws,is_skylake,has_fbc,has_hotplug,has_llc,has_ddi,
[    1.139115] [drm:intel_detect_pch] Found SunrisePoint PCH
[    1.139419] [drm:intel_csr_ucode_init] Loading i915/skl_dmc_ver1.bin
[    1.139434] i915 0000:00:02.0: Direct firmware load for i915/skl_dmc_ver1.bin failed with error -2
[    1.139448] [drm:i915_firmware_load_error_print [i915]] *ERROR* failed to load firmware i915/skl_dmc_ver1.bin (0)

the firmware is there though, and of the latest version.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496163/comments/4


** Changed in: linux
       Status: Unknown => Confirmed

** Changed in: linux
   Importance: Unknown => Medium

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

Title:
  Wily: firmware load for i915/skl_dmc_ver1.bin failed with error -2

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Triaged

Bug description:
  On Skylake, the skl_dmc firmware is failing to load. From 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)

  This means the GPU can't enter its lowest available power states, plus
  many display hotplugging scenarios (that only the skl_dmc firmware can
  handle) are broken.

  On a whim I tried some other firmware versions:

  1) pointed the skl_dmc_ver1.bin symlink to skl_dmc_ver1_18.bin
  (instead of skl_dmc_ver1_19.bin)

  2) downloaded the latest (skl_dmc_ver1_21.bin) and pointed the
  skl_dmc_ver1.bin symlink to it

  But neither corrected the situation.

  Thanks!

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-10-generic 4.2.0-10.11
  ProcVersionSignature: Ubuntu 4.2.0-10.11-generic 4.2.0
  Uname: Linux 4.2.0-10-generic x86_64
  ApportVersion: 2.18.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  oem        1251 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Sep 15 16:21:24 2015
  HibernationDevice: RESUME=UUID=637df075-0afa-420f-a3ca-342be8bf297f
  IwConfig:
   enp4s0    no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 04f2:0833 Chicony Electronics Co., Ltd 
   Bus 001 Device 002: ID 046d:c05a Logitech, Inc. M90/M100 Optical Mouse
   Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: System manufacturer System Product Name
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-10-generic root=UUID=f967534a-9cc3-4d1a-a7f3-72d28959e3c6 ro i915.verbose_state_checks=1 quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-10-generic N/A
   linux-backports-modules-4.2.0-10-generic  N/A
   linux-firmware                            1.147
  RfKill:
   
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/19/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0403
  dmi.board.asset.tag: Default string
  dmi.board.name: Z170-P D3
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0403:bd08/19/2015:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ170-PD3:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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