Because before he downgraded to GCC version to 4.8, so first upgrade GCC version
1 $sudo apt - get remove GCC
2 $sudo apt - get the install GCC
Check the GCC version of GCC -v
At this time of 5.5
Then reinstall the graphics card drivers, baidu search ubuntu16.04 install nvidia graphics driver system run way, by this way

CodePudding user response:

Ok, and then to downgrade the GCC, because before had 5. 4.8 x and the two versions, so 4.8 changes to the default version, can according to the baidu "ubuntu 16.04 LTS relegated to install GCC 4.8 and the switching between multiple versions" method to modify, then version check GCC - v