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[walkerstreet <1745049@xxxxxxxxxxxxxxxxxx>]

I found out that the 4.13.0.31 kernel was from the artful security repo.
When I use 'dkms status' it shows that the bumblebee and nvidia kernel
modules appear to be present.   I just tried booting with the 4.14.0.31
kernel again.  This time it did not crash.  However, it appeared that my
graphics card lost its' capability and the screen was drawing windows
very slowly.  I lost my ability to change the screen resolution.  I
think there is something wrong with kernel 4.13.0.31.

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https://bugs.launchpad.net/bugs/1745049

Title:
  Bumblebee crashes during boot with kernel 4.13.0.31 on Bionic

Status in bumblebee package in Ubuntu:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  My laptop (Dell XPS 15 9560) fails to boot to the login screen when bumblebee is installed and running with the latest Bionic kernel 4.13.0.31.  I recently upgraded to Bionic using update-manager -d.
  My workaround is to use the old kernel 4.13.0.25.26 instead.  My laptop boots fine with the old kernel and bumblebee works.
  I suspect there is some problem with bumblebee's compatibility with the new kernel.

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