Hi Vincent,

I already tried that grub modification (rcutree.rcu_idle_gp_delay=1) a lot of 
times in the past but probably in different conditions, because here, it worked 
!

In summary now, here is how you can simply get it working, following all that I 
did (I made a new fresh legacy-bios install just to be double sure !)

   0 - You need a computer with an Intel Display + Nvidia discrete card (mine 
is Asus R510JK - DM086H, with up to date bios, i5-4200H and GeForce 850M)
   1 - the simplest and minimalist net-installer for example (amd64 - 8.4.0 - 
started and installed as efi or legacy-bios, workaround work for both)
   2 - in my case, I work with : apt-get install lightdm lxde-core aptitude 
mesa-utils (I also added leafpad, synaptic and chromium, realtek and WiFi 
drivers + wicd, xarchiver pavucontrol for having sound card selection, and 
xbacklight for screen light intensity)
   3 - modify /etc/default/grub to add rcutree.rcu_idle_gp_delay=1 into 
GRUB_CMD_LINE and GRUB_CMD_LINE_DEFAULT, then "update-grub" as root and 
"reboot".
   4 - aptitude -t jessie-backports install bumblebee-nvidia, rebooted and it 
works ! Today it installs bumblebee 3.2.1-10~bpo8+1, and nvidia 352.79-1~bpo8+1 
and a lot of others things.

Having already tried that grub modification in the past without success for 
what seemed to be the same error, before I can confirm you that this workaround 
doesn't work with the standard jessie's bumblebee installation - and all the 
sub-packages that comes with - it would be more nearly sure for me to try again 
and look if the error logs were the same !

Thanks for your help, and :

I would suggest adding this simple procedure, for those who need a version 
>340.96 of the nvidia driver, into the Debian bumblebee installation's wiki :

  1 - with backports enabled into source.list, apt-get update and aptitude -t 
jessie-backports install bumblebee-nvidia
  2 - modify /etc/default/grub to add rcutree.rcu_idle_gp_delay=1 into 
GRUB_CMD_LINE and GRUB_CMD_LINE_DEFAULT, then "update-grub" and "reboot"
      (or may be, 2bis, use the backported version of the kernel, but I didn't 
tested it)

And last thing : is this backported simple and full installation of 
bumblebee-nvidia working for anyone without the second point ? I didn't tested 
the newer backported kernel, because few days in the past, I had game crashes 
and kernel panics every few minutes with a more recent kernel on ubuntu 15.10, 
that's why I will first give it a try with 3.16 before upgrading if I really 
need :)

Thanks again for you help, I hope this thread could have clarified things for 
others people trying to play with Debian !

Best regards,
Julien ROBIN

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