Ubuntu installation notes

Last modified: Sun Dec 4 16:38:41 EST 2016

Current as of 2016-12 and Ubuntu 16.10.

Installer boots to a black screen of death

Before the screen goes black, you first briefly get a purple screen with a couple of pictograms at the bottom.  At this point hit the down arrow key.  On the screen that comes up, hit F6 to get a menu.  Cursor down to nomodeset and hit Enter on that so that it gets an X next to it.  Then hit Esc to get back to the top level and choose your option to proceed.

Super-slow graphics after successful installation

System Settings → Software & Updates → Additional Drivers.  Switch to the Nvidia driver and reboot.

Ubuntu installation kills existing Manjaro

Ubuntu and Manjaro each use an auto-everything Grub2 infrastructure to boot themselves and any other operating systems that they find.  However, when Ubuntu finds Manjaro, it auto-everythings wrong so that Manjaro panics on boot.

Compare the Manjaro entries in Manjaro's and Ubuntu's /boot/grub/grub.cfg files.

Manjaro:

menuentry 'Manjaro Linux' ...
  ...
  initrd  /boot/intel-ucode.img /boot/initramfs-4.1-x86_64.img

Ubuntu:

menuentry 'Manjaro Linux (15.12) ...
  ...
  initrd /boot/intel-ucode.img

As a temporary measure to get back into Manjaro, manually edit Ubuntu's grub.cfg to add the missing initramfs reference.  Then boot into Manjaro and clobber Ubuntu's grub installation with Manjaro's:

sudo grub-install /dev/sda    # Specify the correct disk instead of sda
sudo update-grub

Now you can boot both Manjaro and Ubuntu from Manjaro's grub, BUT you need to run update-grub manually in Manjaro any time that Ubuntu updates its kernel or initrd.


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