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acpi=off is the only way to USB Live Ubuntu/Lubuntu, which eventually shows up only 1 processor (for i7 6700HQ), no power option, no brightness control etc. There are couple of people suffering from the same,

Unable to run Ubuntu on a MSI laptop without disabling ACPI

Sony VAIO laptop SVF11N11CLB not start Ubuntu 16.04 without acpi = off

Booting Ubuntu with "acpi=off" grub parameter

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1336451

How to resolve the issue? Such that processor, power options, brightness control and other ubuntu options are normalized. Such things need to be sorted out.

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I have the same processor. Have you tried nomodeset?

If you have an nvidia optimus machine like me probably nouveau is freezing the computer on boot.If that's the case you can try nouveau.modeset=0. In my case only this is needed.

Nvidia is hostile to free open source drivers and newer cards are very problematic with nouveau. After that you should be able to install the propietary drivers.

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  • Thanks for the reply. I have tried nouveau.blacklist = 1 without any positive outcome. The only thing which worked was acpi=off. I have also tried Lubuntu/ Scientific Linux7.2/ Mint, only acpi=off works. – CR7 May 14 '16 at 11:05
  • thnx, it worked. nouveau.modeset=0 was the solution, not nouveau.blackslist=1. – CR7 May 15 '16 at 10:52

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