splitting off nvidia-graphics-drivers-legacy-340xx

[Luca Boccassi]

On Tue, 2015-08-04 at 12:33 +0200, Andreas Beckmann wrote:
> On 2015-08-04 00:02, Luca Boccassi wrote:
> > So installed 340.76-4 on my desktop, and everything seemed fine.
> > 
> > The new module can be loaded and unloaded just fine:
> 
> Good to know. Thanks for testing.
> 
> How does it work if nvidia is not already loaded?

Again on my desktop:

$ lsmod | grep nvidia
$ sudo modprobe nvidia-uvm
$ lsmod | grep nvidia
nvidia_uvm             36864  0 
nvidia              10514432  1 nvidia_uvm
drm                   274432  4 i915,drm_kms_helper,nvidia
$ sudo modprobe -r nvidia
$ lsmod | grep nvidia
$ sudo modprobe nvidia-current-uvm 
$ lsmod | grep nvidia
nvidia_uvm             36864  0 
nvidia              10514432  1 nvidia_uvm
drm                   274432  4 i915,drm_kms_helper,nvidia
$ sudo modprobe -r nvidia-current
$ lsmod | grep nvidia
$ sudo modprobe nvidia-current
$ lsmod | grep nvidia
nvidia              10514432  0 
drm                   274432  4 i915,drm_kms_helper,nvidia
$ sudo modprobe -r nvidia-current
rmmod: ERROR: Module nvidia_uvm is not currently loaded
modprobe: FATAL: Error running remove command for nvidia_current
$ lsmod | grep nvidia

Note the displayed error when modprobe'ing only nvidia-current but not
nvidia-current-uvm. It just complains but it works fine, so it is a bit
misleading. I wonder if we could do something about it? I tried playing
with modprobe.d/nvidia.conf, with using modprobe -r --ignore-remove
instead of rmmod, but no luck.

On my laptop testing modules individually is a bit harder since I need
to go through bumblebee. I'm not able to enable the card manually (by
tee'ing into /proc/acpi/bbswitch) and the modprobe'ing the modules, with
other versions of the drivers too. I thought this was possible once, or
did I imagine it?

Anyway, testing through bumblebee went fine as well.

Kind regards,
Luca Boccassi
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