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[Sönke von Heymann <svheymann@xxxxxxxxxxx>]

I have the same problem, my hardware is a Clevo P640RE with intel
i7-6700HQ and a nvidia GTX970M.

With 15.10 i got it working (a little bit) with
i915.preliminary_hw_support=1 and nomodeset, but the system always froze
after some seconds, except if starting in recovery mode. I tried
different nvidia-drivers but that did not change anything.

So i tried 16.04 alpha but i had the same issues with kernel 4.3 as with
4.2, only recovery mode was working. After compiling & installing the
latest 4.4.0.1.15 kernel (4.3 config and default to all questions) and
with the newest nvidia-361 i can still not use the nvidia-card (the
login problem mentioned above) but at least it starts with the intel gpu
if i boot in recovery mode.

Also i cannot change the brightness using the intel gpu.

At some point after installing/uninstalling nvidia-drivers i got a
working nvidia-config for a moment and i was able to change brightness,
but that did only last until the next reboot and everything was broken
again.

If i start with 4.4.0.1.15 without recovery mode, it switches to a blank
black screen after grub, cpu seems to go to 100% and freezes. nomodeset
has no effect.

-- 
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/1533221

Title:
  Booting with intel graphics enabled results in a lockup

Status in linux package in Ubuntu:
  Triaged

Bug description:
  Booting with intel graphics enabled results in a lockup loading lightdm or logging in results in the greeter screen appearing again. The laptop has a Nvidia GTX730 graphics card which can be switched off via bumblebee or prime.
  --- 
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ian        2045 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.10
  HibernationDevice: RESUME=UUID=df036c01-8f22-4d8f-ad55-6add4f99f5f4
  MachineType: Notebook P65_P67RGRERA
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-43-generic root=UUID=2077d068-d7ee-4407-89e1-7d2b884173de ro quiet splash
  ProcVersionSignature: Ubuntu 3.19.0-43.49-generic 3.19.8-ckt10
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-43-generic N/A
   linux-backports-modules-3.19.0-43-generic  N/A
   linux-firmware                             1.155
  Tags:  wily
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-43-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 11/20/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.05.10
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: P65_P67RGRERA
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.05.10:bd11/20/2015:svnNotebook:pnP65_P67RGRERA:pvrNotApplicable:rvnNotebook:rnP65_P67RGRERA:rvrNotApplicable:cvnNotebook:ct10:cvrN/A:
  dmi.product.name: P65_P67RGRERA
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook

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