Mine is HP 540 / Gnu/Linux Mint Maya. No GPU. I use Cinnamon. I did Mint Update. I simply installed Nvidia tool settings and experimental-310. Once I rebooted, I can see only ordinary desktop without any cinnamon panels, screenlets, menu, hot corner(mint) and the theme was entirely changed to Old-Linux-style. Then I uninstalled Nvidia settings/experimental. Yet I couldn't recover my cinnamon desktop.
closed as off topic by Eric Carvalho, Sergey, Eliah Kagan, Bruno Pereira♦ Jan 23 at 20:40
Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.
try to reach cinnamon setting and do reset for all settings to default
start the terminal use CTRL+ALT+T