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[Bug 1554613] Re: Screen flickers on XPS 13 9350/9550 (Intel Skylake/Broadwell GPU)


Amazingly, Bluetooth ON/OFF seems to have an effect on this bug. I have
been running with Bluetooth constantly ON for the past couple of days
and have seen no flicker at all. As soon as I turn off Bluetooth a
flicker occurs after a couple of minutes. I also copied the firmware
file from the Windows drivers for the Dell Wireless 1830 card as
Bluetooth wasn't finding any devices without it. I am not 100% sure, but
I think before adding the bluetooth firmware I got flicker with
Bluetooth ON as well. You can get the firmware file from this thread -

I am running an XPS 9550 with an i7-6700HQ.

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  Screen flickers on XPS 13 9350/9550 (Intel Skylake/Broadwell GPU)

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:

Bug description:
  *** Temporary workaround ***
  Install Kernel from the following location:
  - http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/

  Perform the following:
  - $ apt-add-repository "deb http://ppa.launchpad.net/canonical-kernel-team/ppa/ubuntu yakkety main"
  - $ echo -en "Package: *\nPin: release o=LP-PPA-canonical-kernel-team-ppa\nPin-Priority: -1\n" >> /etc/preferences.d/canonical-kernel-team-ubuntu-ppa-yakkety
  - $ apt update
  - $ apt install linux-image-extra-4.6.0-6-generic linux-headers-4.6.0-6-generic linux-tools-4.6.0-6-generic

  Please inspect duplicate reports for more details:
      Bug #1522922
      Bug #1535048
      Bug #1552304
      Bug #1555158
      Bug #1561729
      Bug #1565234
      Bug #1568599
      Bug #1573392

  does not affect 4.4.0-8
  affects 4.4.0-9 to 4.4.0-22

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-generic
  ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2
  Uname: Linux 4.4.0-8-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
   /dev/snd/controlC0:  tbonfort   1498 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Tue Mar  8 09:57:12 2016
  HibernationDevice: RESUME=UUID=3248e0d7-0dac-4ccc-8982-b5ac5ce6ed5e
  InstallationDate: Installed on 2016-01-07 (61 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0c45:670c Microdia
   Bus 001 Device 002: ID 0a5c:6412 Broadcom Corp.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9350
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-8-generic root=UUID=757547b8-d0e4-4eb8-8afd-920b743f99a4 ro quiet splash vt.handoff=7
   linux-restricted-modules-4.4.0-8-generic N/A
   linux-backports-modules-4.4.0-8-generic  N/A
   linux-firmware                           1.156
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-02-28 (9 days ago)
  dmi.bios.date: 01/08/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.2.3
  dmi.board.name: 07TYC2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr1.2.3:bd01/08/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9350
  dmi.sys.vendor: Dell Inc.

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