Comment 84 for bug 1431753

I had the same experience.

It turned out thet my xorg.conf file had been renamed with a .back suffix. I copied it back and restarted, and all was good.

On August 11, 2015 9:14:05 AM CEST, ciro santoro <email address hidden> wrote:
>I installed last updates on my ubuntu 14.04 and, after reboot, it
>starts
>and remains with a black screen.. I listened the ubuntu welcome sound
>and
>nothing appens :(
>
>2015-08-08 20:51 GMT+02:00 Nathanaël Naeri
><email address hidden>:
>
>> Packages nvidia-331-* are now transitional packages for version 340
>> where this bug has been fixed, so I guess they can be marked as Fix
>> Released too. Thanks everyone involved esp. Alberto for your work.
>>
>> --
>> You received this bug notification because you are subscribed to a
>> duplicate bug report (1409930).
>> https://bugs.launchpad.net/bugs/1431753
>>
>> Title:
>> Nvidia binary driver FTBS due to DKMS layer violation
>>
>> Status in nvidia-graphics-drivers-331 package in Ubuntu:
>> Confirmed
>> Status in nvidia-graphics-drivers-331-updates package in Ubuntu:
>> Confirmed
>> Status in nvidia-graphics-drivers-340 package in Ubuntu:
>> Fix Released
>> Status in nvidia-graphics-drivers-340-updates package in Ubuntu:
>> Fix Released
>> Status in nvidia-graphics-drivers-346 package in Ubuntu:
>> Fix Released
>> Status in nvidia-graphics-drivers-346-updates package in Ubuntu:
>> Fix Released
>> Status in nvidia-graphics-drivers-331 source package in Trusty:
>> Triaged
>> Status in nvidia-graphics-drivers-331-updates source package in
>Trusty:
>> Triaged
>> Status in nvidia-graphics-drivers-340 source package in Trusty:
>> Fix Released
>> Status in nvidia-graphics-drivers-340-updates source package in
>Trusty:
>> Fix Released
>> Status in nvidia-graphics-drivers-346 source package in Trusty:
>> Fix Released
>> Status in nvidia-graphics-drivers-346-updates source package in
>Trusty:
>> Fix Released
>>
>> Bug description:
>> Filing this against the 340-updates version but possibly the same
>> applies to older versions, too. The nvidia source package produces
>two
>> individual dkms packages: nvidia-340-updates,
>nvidia-340-updates-uvm.
>> The problem is that the DKMS build of the nvidia-uvm module runs
>> compile steps inside the nvidia modules build directory. This is
>> violating the DKMS assumption that each module can be build
>> independently (there is no way of describing cross-modules
>> dependencies and even more important, the autoinstall step after a
>new
>> kernel is installed will run the modules build in parallel).
>>
>> Since nvidia and nvidia-uvm are very dependent on each other the
>right
>> course of action seems to be to combine both sources in one DKMS
>> module that produces two kernel modules (this is supported by
>DKMS).
>> For the transition this resulting dkms package needs to have a
>> breaks/replaces for the nvidia-uvm package.
>>
>> To manage notifications about this bug go to:
>>
>>
>https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1431753/+subscriptions
>>
>
>
>--
>Ciro Santoro
>
>--
>You received this bug notification because you are subscribed to a
>duplicate bug report (1410245).
>https://bugs.launchpad.net/bugs/1431753
>
>Title:
> Nvidia binary driver FTBS due to DKMS layer violation
>
>Status in nvidia-graphics-drivers-331 package in Ubuntu:
> Confirmed
>Status in nvidia-graphics-drivers-331-updates package in Ubuntu:
> Confirmed
>Status in nvidia-graphics-drivers-340 package in Ubuntu:
> Fix Released
>Status in nvidia-graphics-drivers-340-updates package in Ubuntu:
> Fix Released
>Status in nvidia-graphics-drivers-346 package in Ubuntu:
> Fix Released
>Status in nvidia-graphics-drivers-346-updates package in Ubuntu:
> Fix Released
>Status in nvidia-graphics-drivers-331 source package in Trusty:
> Triaged
>Status in nvidia-graphics-drivers-331-updates source package in Trusty:
> Triaged
>Status in nvidia-graphics-drivers-340 source package in Trusty:
> Fix Released
>Status in nvidia-graphics-drivers-340-updates source package in Trusty:
> Fix Released
>Status in nvidia-graphics-drivers-346 source package in Trusty:
> Fix Released
>Status in nvidia-graphics-drivers-346-updates source package in Trusty:
> Fix Released
>
>Bug description:
> Filing this against the 340-updates version but possibly the same
> applies to older versions, too. The nvidia source package produces two
> individual dkms packages: nvidia-340-updates, nvidia-340-updates-uvm.
> The problem is that the DKMS build of the nvidia-uvm module runs
> compile steps inside the nvidia modules build directory. This is
> violating the DKMS assumption that each module can be build
> independently (there is no way of describing cross-modules
> dependencies and even more important, the autoinstall step after a new
> kernel is installed will run the modules build in parallel).
>
> Since nvidia and nvidia-uvm are very dependent on each other the right
> course of action seems to be to combine both sources in one DKMS
> module that produces two kernel modules (this is supported by DKMS).
> For the transition this resulting dkms package needs to have a
> breaks/replaces for the nvidia-uvm package.
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1431753/+subscriptions

--
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