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[Bug 1364805] Re: [Lenovo ThinkPad T440p][10de:1290] hot key "video out" could not work under graphic performance mode.


In comment #6, I also noted the desktop rendering is slower under the performance mode (nvidia) than power-saving mode (intel)
Take for example:
1. switch to performance/power-saving mode by the command, prime-select nvidia/intel
2. open the terminal. try to type some words
3. when typing in the words, you could tell the response is different between two modes.

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  [Lenovo ThinkPad T440p][10de:1290] hot key "video out" could not work
  under graphic performance mode.

Status in HWE Next Project:
Status in “linux” package in Ubuntu:

Bug description:
  Lenovo ThinkPad T440p ( CID 201309-14169 ) on Ubuntu 14.04


  Steps to reproduce this bug:
  1. install proprietary dirver nvidia-331 to enable the nvidia graphic card [10de:1290]
  2. reboot
  3. plugin mini display port of a monitor
  4. press the hot key to try to switch to different display mode.

  Expected result:
  The display mode was changed.

  Actual result:
  Nothing happened.


  More information:
  1. on power-saving mode, the hot key works
  2. there are two kinds of port, VGA and mini-display port. Both of them have this issue.
  3. dash->display could set up the external monitor screen on mini-display and VGA port both. (mirror, extended, built-in screen only and external screen only)


  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic]
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
   /dev/snd/controlC1:  ubuntu     1716 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1716 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Sep  3 03:34:38 2014
  HibernationDevice: RESUME=UUID=b437ec5c-4a11-4108-a4b7-900f2ea9f312
  InstallationDate: Installed on 2014-08-27 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20ANZ03CUS
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=cb520008-8859-45fa-b8dd-d66a667b1be2 ro rootdelay=60 quiet splash initcall_debug
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/20/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GLET34WW (1.09.T05 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20ANZ03CUS
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGLET34WW(1.09.T05):bd08/20/2013:svnLENOVO:pn20ANZ03CUS:pvrThinkPadT440p:rvnLENOVO:rn20ANZ03CUS:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20ANZ03CUS
  dmi.product.version: ThinkPad T440p
  dmi.sys.vendor: LENOVO

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