Bug when switching between users

[ra9uek]

Hello,

In Ubuntu 18.04 there is a serious bug that manifests itself when switching between users. This is not every time, but often. When I try to switch to another user, after entering the password, I get a clean screen, there are no calls to the hard drive. The computer is reset by the reset button. Where should I go to fix this bug?
Thank you

[cariboo]

You can create a bug report by following this wiki page:

https://help.ubuntu.com/community/ReportingBugs