Same problem on fresh install of encrypted lvm root with lvm swap of ubuntu 15.10 with amd graphics using open source amd. Work around seems to be revise /etc/default/grub to:
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX="quiet splash"
followed by "sudo update-grub2" and "sudo update-initramfs -u" and "sudo grub-install /dev/sda"
This causes /boot/grub/grub.cfg to change the linux line to end in quiet splash
linux /vmlinuz-4.2.0-22-generic.efi.signed root=/dev/mapper/vg-root ro quiet splash
I wonder if the normal line ending of $vt_handoff may be the problem. I don't know what causes $vt_handoff to appear or even how to permanently remove it.
Same problem on fresh install of encrypted lvm root with lvm swap of ubuntu 15.10 with amd graphics using open source amd. Work around seems to be revise /etc/default/grub to: LINUX_DEFAULT= "" LINUX=" quiet splash"
GRUB_CMDLINE_
GRUB_CMDLINE_
followed by "sudo update-grub2" and "sudo update-initramfs -u" and "sudo grub-install /dev/sda"
This causes /boot/grub/grub.cfg to change the linux line to end in quiet splash
linux /vmlinuz- 4.2.0-22- generic. efi.signed root=/dev/ mapper/ vg-root ro quiet splash
I wonder if the normal line ending of $vt_handoff may be the problem. I don't know what causes $vt_handoff to appear or even how to permanently remove it.
hth