I'm running Ubuntu 13.10 with dual boot along side Windows 8.
The top panel or bar doesn't display the time.
When I open the Clock menu, all the settings over there are grayed out
Settings > Time and date > Clock
I tried other methods (like dconf) but that didn't work.
Reinstall
indicator-datetime. It should be installed by default, but just in case you have removed it unknowingly, it is best to run the install command again.sudo apt-get install indicator-datetimeNext, we are going to reconfigure the date time:
sudo dpkg-reconfigure --frontend noninteractive tzdataLastly, restart unity.
sudo killall unity-panel-serviceThat’s it. The date and time indicator will appear in the menu bar now.
(Source)
WARNING: All users will logout immediately, possibly losing data. All applications will also close.
It is happening to me sometimes, the solution is:
sudo restart lightdm
I've been in the same situation myself once. What I've made was to reinstall gnome-control-center using the following commands in terminal:
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install --reinstall gnome-control-center
After I restart the GUI from tty1 uing the following command:
sudo restart lightdm
the problem didn't appeared again until now.
It means your chosen region is not matched to your local server.
To correct: 1/ set the time&date to your actual region (eg China) 2/ use synaptic to select the repository server for your actual region (eg China). 3/ reboot.
This should solve the issue. Recurrence may be caused by change in location, or change in server, or update/upgrade. If so, repeat the above.
Or you can simply restart your computer. Time will show itself on the top panel again. I have also faced this problem a few times.
Because sometimes sudo lightdm restart won't work
