kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Richard Platt, it will help immensely if you filed a new report with the Ubuntu repository kernel (not mainline/upstream) via a terminal:
ubuntu-bug linux

Please feel free to subscribe me to it.

For more on why this is helpful, please see
https://wiki.ubuntu.com/ReportingBugs.

** Description changed:

  I upgraded to this version of the linux kernel (Linux xps
  4.4.0-9-generic #24-Ubuntu SMP Mon Feb 29 19:33:19 UTC 2016 x86_64
  x86_64 x86_64 GNU/Linux) and the screen now flickers ramdomly. flicker
  every few seconds for a fraction of the second. Not related to
  application install or system load.
+ 
+ WORKAROUND: I discovered that if you have tlp installed and running, you
+ will get screen flicker. If you disable it, or remove it, the flicker
+ goes away.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-9-generic 4.4.0-9.24
  ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3
  Uname: Linux 4.4.0-9-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  anmar      1810 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  anmar      1810 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Mar  2 11:11:37 2016
  HibernationDevice: RESUME=UUID=94adb22b-7cde-416d-a17f-c3e5d40718da
  InstallationDate: Installed on 2016-03-02 (0 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160301)
  Lsusb:
-  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
-  Bus 001 Device 003: ID 0bda:5682 Realtek Semiconductor Corp. 
-  Bus 001 Device 002: ID 0a5c:6412 Broadcom Corp. 
-  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
+  Bus 001 Device 003: ID 0bda:5682 Realtek Semiconductor Corp.
+  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-4.4.0-9-generic.efi.signed root=UUID=9945d9bf-9e44-4308-a4ec-c1f92f9b330c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-4.4.0-9-generic N/A
-  linux-backports-modules-4.4.0-9-generic  N/A
-  linux-firmware                           1.156
+  linux-restricted-modules-4.4.0-9-generic N/A
+  linux-backports-modules-4.4.0-9-generic  N/A
+  linux-firmware                           1.156
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.1.9
  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.:bvr1.1.9:bd12/18/2015:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9350
  dmi.sys.vendor: Dell Inc.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1552304

Title:
  screen flicker on Dell XPS 13 9350 after kernel upgrade

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I upgraded to this version of the linux kernel (Linux xps
  4.4.0-9-generic #24-Ubuntu SMP Mon Feb 29 19:33:19 UTC 2016 x86_64
  x86_64 x86_64 GNU/Linux) and the screen now flickers ramdomly. flicker
  every few seconds for a fraction of the second. Not related to
  application install or system load.

  WORKAROUND: I discovered that if you have tlp installed and running,
  you will get screen flicker. If you disable it, or remove it, the
  flicker goes away.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-9-generic 4.4.0-9.24
  ProcVersionSignature: Ubuntu 4.4.0-9.24-generic 4.4.3
  Uname: Linux 4.4.0-9-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  anmar      1810 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Mar  2 11:11:37 2016
  HibernationDevice: RESUME=UUID=94adb22b-7cde-416d-a17f-c3e5d40718da
  InstallationDate: Installed on 2016-03-02 (0 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160301)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0bda:5682 Realtek Semiconductor Corp.
   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-4.4.0-9-generic.efi.signed root=UUID=9945d9bf-9e44-4308-a4ec-c1f92f9b330c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-9-generic N/A
   linux-backports-modules-4.4.0-9-generic  N/A
   linux-firmware                           1.156
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/18/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.1.9
  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.:bvr1.1.9:bd12/18/2015:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9350
  dmi.sys.vendor: Dell Inc.

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