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I just flashed my laptops bios to newest version and now I have the option to define how i'd like to set my graphic mode. I have the option to check "integrated" and "switchable". The difference seems to be using only internal gpu or both (the dedicated nvidia optimus).

If setting to integrated, I can boot Ubuntu without acpi=off, but when setting to "switchable" I need to set acpi=off in grub options.

My question is why or how is the acpi option related with the dedicated gpu?

I'd like to use my laptop also for gaming so I'm depending on "switchable". How's the name of the boot option to fix my gpu issue without completely disabling acpi? Since I have here a bunch of options but I don't understand the differences due lack of knowledge.

user.dz
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Dionysius
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1 Answers1

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The circumstances summerized are: you need acpi on for bumblebee to work, but you can only install the os with acpi off.

This issue appears to only affect ubuntu 12.04 and around that, because since 14.04 and onwards I haven't had this issue anymore (on the same hardware and also other similar hardware). The correct time modifying kernel parameters was key:

Before Installation

  • Set gpu-mode to switchable in BIOS

During OS Installation

  • Set acpi=off as custom kernel parameter before starting os installation
  • install as usual

After finished OS Installation

  • install bumblebee
  • remove acpi=off as custom kernel in grub configuration
  • reboot

You should now be able to boot with working graphics and working bumblebee.

Dionysius
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