Comment 15 for bug 1507676

That seems a poor choice as modesetting would prevent users from setting
Intel to use a tearfree option to eliminate tearing when using the Nvidia
drivers

On Sep 29, 2016 4:55 PM, "Vassil Peytchev" <email address hidden>
wrote:

> This happened on my Dell M3800 with the Optimus Nvidia GPU and nvidia-
> prime when updating to the 14.04.5 LTS HWE.
>
> The workaround I used was to force the modesetting driver in xorg.config
> for the Intel GPU, and not allow changes to xorg.config (see
> https://vxlabs.com/2015/02/05/solving-the-ubuntu-14-04-nvidia-346
> -nvidia-prime-black-screen-issue/).
>
> An updated ubuntu-drivers-common to make gpu-manager use the modesetting
> driver will be most helpful.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1507676
>
> Title:
> Nvidia-Prime not switching from intel to nvidia leading to a black
> screen
>
> Status in ubuntu-drivers-common package in Ubuntu:
> Fix Released
> Status in xserver-xorg-video-intel package in Ubuntu:
> In Progress
>
> Bug description:
> STEPS:
> 1. Install 15.10 on a laptop that supports optimus nvidia/intel hybrid
> graphics
> 2. Install nvidia and nvidia-prime
> 3. Open nvidia settings
> 4. Switch to nvidia
> 5. Log out
> 6. Hear the login drums
>
> EXPECTED:
> I expect to see the lightdm login page
>
> ACTUAL:
> You are presented with a black page
>
> TEMP WORKAROUND:
> 1. Tap ctrl-alt-f1
> 2. login
> 3. run sudo prime-select intel
> 4. run sudo service lightdm restart
> 5. System is back running on the intel stack alone.
>
> To manage notifications about this bug go to:
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> common/+bug/1507676/+subscriptions
>