Update for UbuntuMATE 16.04.6 broke the GUI

[Ralf Mardorf]

On Wed, 28 Aug 2019 07:44:12 +0200, Ralf Mardorf wrote:
>On Wed, 28 Aug 2019 06:19:23 +0800, Bret Busby wrote:
>>On 28/08/2019, Ralf Mardorf via ubuntu-users
>><ubuntu-users at lists.ubuntu.com> wrote:  
>>> On Wed, 28 Aug 2019 02:10:00 +0800, Bret Busby wrote:    
>>>>dconf-WARNING **: failed to commit changes to dconf: Cannot
>>>>autolaunch D-Bus without X11 $DISPLAY    
>>>
>>> Start a X session for your new user and then use gsettings to edit
>>> dconf for the old user.
>>>
>>> sudo -Hu olduser dbus-launch gsettings [...]
>>>
>>> https://askubuntu.com/questions/1134453/how-to-run-gsettings-for-another-user-ubuntu-18-04-2-lts
>>>    
>>
>>I logged in as user1 (which has sudo privilege) at a console, and ran
>>sudo adduser user2 sudo
>>then rebooted and logged in to the GUI as user2 .
>>
>>I then  (as user2) opened a GUI terminal and ran
>>sudo -Hu user1 dbus-launch gsettings list-schemas | grep org.mate |
>>xargs -n 1 gsettings reset-recursively
>>as advised.
>>
>>It returned "No protocol" then reset the panel settings for user2.
>>
>>So, the panels are still broken for user1, and, now, the panels
>>settings for user2 are returned to the default settings.  
>
>Doesn't Mate provide a shortcut to open an app finder or a right click
>menu to launch a terminal as user1? There's no way to launch a
>terminal as user1?
>
>If you only can open a terminal as user2, then as user2 run
>
>sudo -u user1 HOME=/home/user1 dbus-launch gsettings list-schemas |
>grep org.mate | xargs -n 1 gsettings reset-recursively
>
>after that run
>
>HOME=/home/user2

If you run a X session as user1, did you try Ctrl+Alt+F2 to run
gsettings?