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[sohey <sohey33@xxxxxxxxx>]

Public bug reported:

Screen flickers after upgrade to 16.04 from 15.10 on Dell XPS13  9350.

Flickers frequently on mid-range brightness, better on high and low
range brightness.

Tried to turn off tlp but doesn't help

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  seanl      1895 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon May  2 21:27:58 2016
HibernationDevice: RESUME=UUID=8c16e7e0-1b67-4bf7-b502-25e5d6de6d81
InstallationDate: Installed on 2015-12-16 (138 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 0c45:670c Microdia 
 Bus 001 Device 003: 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-4.4.0-21-generic.efi.signed root=UUID=0d974029-002f-443f-b682-4209064663d0 ro acpi_sleep=nonvs quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-21-generic N/A
 linux-backports-modules-4.4.0-21-generic  N/A
 linux-firmware                            1.157
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-04-22 (9 days ago)
dmi.bios.date: 11/27/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.7
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.:bvr1.1.7:bd11/27/2015:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9350
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

-- 
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https://bugs.launchpad.net/bugs/1577364

Title:
  Screen flickers after upgrade to 16.04 from 15.10 on Dell XPS13  9350

Status in linux package in Ubuntu:
  New

Bug description:
  Screen flickers after upgrade to 16.04 from 15.10 on Dell XPS13  9350.

  Flickers frequently on mid-range brightness, better on high and low
  range brightness.

  Tried to turn off tlp but doesn't help

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  seanl      1895 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon May  2 21:27:58 2016
  HibernationDevice: RESUME=UUID=8c16e7e0-1b67-4bf7-b502-25e5d6de6d81
  InstallationDate: Installed on 2015-12-16 (138 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0c45:670c Microdia 
   Bus 001 Device 003: 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-4.4.0-21-generic.efi.signed root=UUID=0d974029-002f-443f-b682-4209064663d0 ro acpi_sleep=nonvs quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-04-22 (9 days ago)
  dmi.bios.date: 11/27/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.1.7
  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.:bvr1.1.7:bd11/27/2015:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9350
  dmi.sys.vendor: Dell Inc.

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