Hi Sorry to bother, problem solved now. I used wrong command to change root password. Adrian 2011/11/14 adrian sun <adriansunny0615@xxxxxxxxx> > Hi all, > I use kde4.7. As the time zone does not set correctly, I tried to change > the timezone as "America/Toronto" > in rc.conf. it did work but the time still not right. So I used date&time > --KDE control module to adjust time, > it said 'System policies prevent you from saving the date/time setting', > and asked me input the password for > root. The authentication failed, I am quite sure the password was correct. > I guess I didn't add time in user group. > Any solution about this? > > Thanks a lot. > > Adrian >