Ubuntu doesn't reboot

Question

I left Linux around 8 years a go, now I want to go back to it. I installed Ubuntu 16.04.2 as dual boot on MSI Leopard ge62 6QF. It wasn't booting before adding

acpi=off 

after quiet splash in the kernel line of GRUB. After this it boots successfully. Now when I wanted to reboot/Poweroff the system, I opened the terminal and wrote:

sudo reboot

It starts rebooting but it is freezing when it gets to

Reboot: Restarting System

I tried all Google suggestions like replacing acpi=force and decreasing the timeout but unfortunately none of them worked and the system doesn't boot anymore.

What else can I do?

Answer 1

Your laptop has the Intel i7-6700HQ 6th generation CPU known as "Skylake". It also has a NVidia Geforce GTX 970M GPU. To eliminate the dedicated Nvidia GPU from the equation you can temporarily work with only the integrated Intel GPU in the short term.

When using Skylake you made need updates:

• Ubuntu 15.10: Various "types" of freezes and now unexpected shutdown
• "W: Possible missing firmware for module i915_bpo" when updating initramfs
• Ubuntu doesn't reboot

These are some of the answers I've written but there are many great answers others have written:

• No version of Ubuntu can be installed with any Skylake 6th generation Intel processor
• 16.04: How to get the recommended intel-microcode package to fix hyper-threading issue?
• Ubuntu 16.04 Skylake 6th Generation Screen Flickering
• Ubuntu 16.04 Skylake overheating

Unfortunately not enough is known about your specific problems to point your question as a duplicate of an existing one.

One last thing to change is the Intel c-state max idle:

• How to set intel_idle.max_cstate=1
• System freezes completely with Intel Bay Trail

Although targeted at Intel BayTrail users it seems to have improved things for other Intel CPU users as well. If these fixes work I regard them as a work-around to make life better in the short term until a real solution is found.