I'm curious what could be the reason why my installed version of Ubuntu requires acpi=off to launch while my Ubuntu live CD doesn't.
I'd add that:
1) I use an Acer Swift 3 Laptop.
2) After booting with
acpi=off, I can't know the battery rate but I can still set the backlight power using
3) I have a dual boot Windows 10 along Ubuntu. I had to add Grub to the secure boot options to be able to boot to Ubuntu. I couldn't boot by just disabling the secure boot. I can still boot grub after disabling the secure boot.
4) I cannot use
hwclock, the command just hang for about 10 seconds before failing with error code 74.
5) Installed Ubuntu fails to shutdown properly: It freezes on the Ubuntu loading screen. This may be due to hwclock (see this forum thread).
6) Sometimes I get no wireless connection and have to restart the laptop. No wireless network appears eventhough
nmcli g tells me that wireless is enabled. It may be a consequence of force-powering it off too quickly at the previous shutdown. -- Using
sudo service network-manager restart restores the wifi connection when the problem occurs.
7) I cannot use the touchpad with installed Ubuntu, eventhough I disabled the Touchpad Advanced Mode in the Bios. (It is mentioned that this mode requires special drivers). Disabling it prevents Windows (10) from detecting multiple fingers movements.
I use Ubuntu xenial 16.04.2 LTS, with kernel 4.8.0-46-generic
acpi? Compare the output of
cat /proc/cmdlineon the live system and on the installed system.