How do i boot into a
fail-safeX, graphics session
for troubleshooting graphics drivers with a desktop & mouse ?
that way a can use a web browser & nice GUI tools to fix regular video drivers. (Nvidia, AMD, Intel)
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Quickly press and hold the Shift key (or Escape key on some computers), which will bring up the GNU GRUB menu.
(If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.)
Use the ← ↑ → ↓ keys to navigate/highlight the entry with
Recovery mode or
advanced options (usually the second one) press Enter to continue booting into the Recovery Menu.
from the recovery menu Select Resume normal boot & hit Enter twice. recovery mode wiki
now your'll be using the fail safe graphics drivers in a recovery session
use can use a Web browser & go to askubuntu.com for help fixing drivers !