Side panel in Xubuntu disappeared
Solution 1:
I had this problem after I changed graphics drivers. My solution was:
Press Alt+F2.
Type
xfce4-panel --preferences
and press Return. This brings up the panel preferences.Under Output, make sure that it is selected to show up on the right monitor. It might be selected to show up on an external video output or some other non-existing monitor.
Repeat this for all affected panels by selecting them from the pull-down at the top of the panel preferences window.
Solution 2:
I had the same problem. I tried the answer from Saurav, but that did not work for me.
My panel would never show when I logged in. So I followed the instructions from Xubuntu Panels.
These are the steps that I got it going:
Press Alt+F2.
Type
xfce4-panel
and press Return. This brings up the Xcfe panel.Log out of Xfce and tick the Save session for future logins button.
Worked for me.
Solution 3:
xfce4-panel --restart
and a 10 sec wait worked for me.