After successful installation of the Ubuntu 16.04 on a new Asus laptop(with Nvidia GeForce graphic card) I was asked to install software updates. The update went successfully and it asked to reboot the system.
Now I can not boot to the system. There so many content about this issue online, but it all relies on the terminal and I can't access it. In fact, this is my biggest problem.
The GRUB menu is there, I can modify the boot command, add nomodeset, remove quiet splash, add nouveau.modeset=0 or nvidia.modeset=0 - but nothing of this helps. I still see the frozen dark purple screen as soon as I hit Ctrl+X. Recovery mode doesn't help either. Tried with all these params as well. The only difference recovery mode makes - I will see these two lines before it hangs:
Loading Linux 4.15.0-58-generic ...
Loading initial ramdisk ...
I tried installing Ubuntu 18 first, run into the same issue. Thought falling back to 16 may help.
UPDATE: managed to log in by adding dis_ucode_ldr option. But have no idea what to do next.
Fixed by upgrading to Ubuntu 18 and then downgrading the intel-microcode package to the previous version using this instruction:
Then freeze the package to avoid accidental upgrade:
Maybe some similar solution can fix the issue on Ubuntu 16 I just didn't find the right package version to downgrade to.
Here is a complete video about this problem, actually for an Asus Zenbook: https://www.youtube.com/watch?v=NbxrSaclKRc
Summary of the fix:
add the boot parameter: dis_ucode_ldr to /etc/default/grub then: update-grub
More info here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1829620