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[Bug 1514315] WifiSyslog.txt

 

apport information

** Attachment added: "WifiSyslog.txt"
   https://bugs.launchpad.net/bugs/1514315/+attachment/4515393/+files/WifiSyslog.txt

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Title:
  [i915_bpo] [SKL-U] System hangs when switching video out to the next
  mode with kernel updated to 3.19.0-32.37+bpo1

Status in linux package in Ubuntu:
  New

Bug description:
  After update to test kernel 3.19.0-32.37+bpo1, system will hang with blackscreen while switching to the next mode with HDMI video out.
  * The function works fine with -28 kernel.
  * SKL-H doesn't find this issue

  Test configs:
  Intel SKL-U graphics: Dell Inspiron 13-7359

  Kernel version: 3.19.0-32.37+bpo1
  --- 
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  u          2108 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-kittyhawk2-trusty-amd64-20150907-1
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=61acef2b-8b38-40a2-a2a1-1f8346dbfa80
  InstallationDate: Installed on 2015-11-06 (2 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Failed to find casper uuid.conf in 'binary/casper/initrd.img-3.19.0-28-generic.old-dkms' LIVE Binary 20150907-22:18
  MachineType: Dell Inc. Inspiron 13-7359
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-32-generic root=UUID=fc10fc31-8426-4eb5-8157-35d5d5c70335 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-32.37+bpo1-generic 3.19.8-ckt7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-32-generic N/A
   linux-backports-modules-3.19.0-32-generic  N/A
   linux-firmware                             1.127.15
  Tags:  trusty
  Uname: Linux 3.19.0-32-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/08/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 01.02.00
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr01.02.00:bd09/08/2015:svnDellInc.:pnInspiron13-7359:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct9:cvr:
  dmi.product.name: Inspiron 13-7359
  dmi.sys.vendor: Dell Inc.

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References