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[Gaele Strootman <gaele@xxxxxxxxxxxx>]

Same here, using a Macbook Pro 11,3 with NVIDIA GeForce GT 750M.
Changing the resolution and clicking Apply blackens the screen and
freezes up  the machine. A hard reboot is necessary.

** Attachment added: "Xorg.0.log.old"
   https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-nouveau/+bug/1443989/+attachment/4384933/+files/Xorg.0.log.old

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https://bugs.launchpad.net/bugs/1443989

Title:
  Video resolution cannot be changed

Status in xserver-xorg-video-nouveau package in Ubuntu:
  Confirmed

Bug description:
  Trying to change the video resolution (I tried on a Macbook Pro Retina
  15") to something like 1900:1200 or 1920:1080 blackens the screen and
  does not revert to the previous settings.

  Worse, the graphics card heats up rapidly and brings the area close to
  the screen to a scorging hot temperature.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  ProcVersionSignature: Ubuntu 3.19.0-13.13-generic 3.19.3
  Uname: Linux 3.19.0-13-generic x86_64
  NonfreeKernelModules: wl
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.17-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.359
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Tue Apr 14 14:39:36 2015
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroVariant: ubuntu
  DkmsStatus: bcmwl, 6.30.223.248+bdcom, 3.19.0-13-generic, x86_64: installed
  ExtraDebuggingInterest: No
  GraphicsCard:
   NVIDIA Corporation GK107M [GeForce GT 650M Mac Edition] [10de:0fd5] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Apple Inc. Device [106b:00f2]
  LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150414)
  MachineType: Apple Inc. MacBookPro10,1
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --- keyboard-configuration/layoutcode=de
  SourcePackage: xserver-xorg-video-nouveau
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/21/2012
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP101.88Z.00EE.B03.1212211437
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-C3EC7CD22292981F
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro10,1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-C3EC7CD22292981F
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP101.88Z.00EE.B03.1212211437:bd12/21/2012:svnAppleInc.:pnMacBookPro10,1:pvr1.0:rvnAppleInc.:rnMac-C3EC7CD22292981F:rvrMacBookPro10,1:cvnAppleInc.:ct10:cvrMac-C3EC7CD22292981F:
  dmi.product.name: MacBookPro10,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.
  version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Tue Apr 14 14:20:56 2015
  xserver.configfile: default
  xserver.errors:
   Failed to load module "nvidia" (module does not exist, 0)
   Failed to load module "nvidia" (module does not exist, 0)
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.17.1-0ubuntu3
  xserver.video_driver: nouveau

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