Yesterday I got a prompt about updating the software (including Ubuntu base) as seems to happen every other day or so, and as usual, I happily went along with that. However, now I have two major problems:
WiFi stopped working: "Enable Wi-Fi" is selected in the menu bar, but it doesn't find any networks at all (I live in an apartment building, even if my own was broken, which it is not, I would have seen others). Reboots do not help. Running "sudo service network-manager restart" solves the problem until next reboot.
Every time I boot up the computer (before login screen) I get the message "Your system is running in low-graphics mode". After that I get four options (I don't remember them all), where the first one is "Try running with default graphics mode". I check that, and everything seems to work fine from there on - graphics look perfectly fine when I log on. But the next time I boot up, same message again, pretty annoying.
I am running Ubuntu 16.04 on a Lenovo Thinkpad T430s, Intel graphics. What can I do to fix this?