I've been using the 4.15 kernel until now without any problems.Today I updated from 4.15.0-15 to 4.15.0-20, as proposed by the Update Manager (I set it to check for all levels, including 4 & 5).After rebooting, the wifi would not work and Cinnamon showed a message saying that it was running on software graphics acceleration.So I guess there are drivers that cannot be loaded.I tried to reboot twice, same problem. Rebooting with the previous version (4.15.0-15) solved the problem.Is anyone else on the 4.15 kernel? Did you update to 4.15.0-20 and is it working for you?
I didn't find the right solution from the Internet.
Edited by johntimber, 20 July 2018 - 07:47 AM.