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[Luca Mastromatteo <lukycrociato@xxxxxxxxx>]

Updated description. I did a lot of tests.
Anyway, my pc configuration:

Acer ASPIRE e5-571G 
Intel Core i5 4210u 1.7Ghz/2.7
Nvidia Geforce 820M

Kernel command line:  quiet splash acpi_osi=
acpi_osi= for me is needed because the optimus card can't exit from D3 state after resuming from suspend.

** Description changed:

- I'm using nvida-current drivers with bumblebee following the ubuntu wiki guide, rebooting, gpu-manager creates automatically an Xorg.conf overriding the correct bumblebee one. 
- I had to rename in /usr/bin/gpu-manager to gpu-manager.old to fix this problem, with removing /etc/X11/xorg.conf
+ I have an Acer Aspire E5-571G with an Intel iGPU and a NVIDIA 820m
+ (Optimus hybrid system)
  
- When I install bumblebee and it's dependencies it should reboot
- correctly
+ I'm using nvida-current drivers with bumblebee following the ubuntu wiki guide, rebooting, after executed just one time "primusrun glxgears" or another program with primus/optirun, when gpu-manager is triggered creates automatically an Xorg.conf probally overriding the correct bumblebee one located in /etc/bumblebee/
+ I had to rename in /usr/bin/gpu-manager to gpu-manager.old or disable via systemctl gpu-manager to fix this problem, with removing /etc/X11/xorg.conf and dpkg-reconfiguring the nvidia-bumblebee package to get lightdm enter into the user correctly  and deleting the dconf folder in .config, unless, compiz crashes (strangely, it can't load openGL plugin) 
+ I don't really know why.
  
- Instead, X.org fallback is runned.
+ Summarizing, the next time I reboot the pc or restart the display
+ manager after executed primus/optirun successfully the first time, gpu-
+ manager reconfigures everything. I can't even get to lightdm unless
+ removing /etc/X11/xorg.conf, it can't join into the user (lightdm loop)
+ unless i reconfigure nvidia-bumblebee package, and compiz crashes unless
+ I delete the dconf configuration. I have also to delete gpu-manager from
+ the init.
+ 
+ Tried with reinstalling ubuntu a few times.
+ 
+ 
+ When I install bumblebee and it's dependencies X should run correctly
+ 
+ Instead, X.org fallback is executed.
  
  I'm using the latest Ubuntu, updated today.

** Summary changed:

- gpu-manager making system unusable in optimus system
+ gpu-manager overrides bumblebee Xorg.conf making X not starting

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to ubuntu-drivers-common in Ubuntu.
https://bugs.launchpad.net/bugs/1527894

Title:
  gpu-manager overrides bumblebee Xorg.conf making X not starting

Status in ubuntu-drivers-common package in Ubuntu:
  New

Bug description:
  I have an Acer Aspire E5-571G with an Intel iGPU and a NVIDIA 820m
  (Optimus hybrid system)

  I'm using nvida-current drivers with bumblebee following the ubuntu wiki guide, rebooting, after executed just one time "primusrun glxgears" or another program with primus/optirun, when gpu-manager is triggered creates automatically an Xorg.conf probally overriding the correct bumblebee one located in /etc/bumblebee/
  I had to rename in /usr/bin/gpu-manager to gpu-manager.old or disable via systemctl gpu-manager to fix this problem, with removing /etc/X11/xorg.conf and dpkg-reconfiguring the nvidia-bumblebee package to get lightdm enter into the user correctly  and deleting the dconf folder in .config, unless, compiz crashes (strangely, it can't load openGL plugin) 
  I don't really know why.

  Summarizing, the next time I reboot the pc or restart the display
  manager after executed primus/optirun successfully the first time,
  gpu-manager reconfigures everything. I can't even get to lightdm
  unless removing /etc/X11/xorg.conf, it can't join into the user
  (lightdm loop) unless i reconfigure nvidia-bumblebee package, and
  compiz crashes unless I delete the dconf configuration. I have also to
  delete gpu-manager from the init.

  Tried with reinstalling ubuntu a few times.

  
  When I install bumblebee and it's dependencies X should run correctly

  Instead, X.org fallback is executed.

  I'm using the latest Ubuntu, updated today.

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