I run Manjaro KDE in one of my laptops. After the latest stable update, I can no longer su or sudo even though I am a member of the wheel group. I am able to login, but I am not able to use su or sudo.
[cribari@darwin6 ~]$ groups cribari wheel lp sys network power users [cribari@darwin6 ~]$ su Password: su: Authentication failure
As root, I did
EDITOR=nano visudo . The line
%wheel ALL=(ALL)..... is uncommented. I changed my password, but the problem remained. Suggestions are welcome. Thanks.