Effects me on a fresh install. "synaptic --display=:0" didn't work but
"xhost +local:" did as suggested in
https://askubuntu.com/questions/614387/gksu-gtk-warning-cannot-open-
display-0
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h
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: synaptic (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1730059
Title:
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