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watchfulstone
November 7th, 2020, 09:07 PM
After upgrading from Lubuntu 18 LTS to Lubuntu 20 LTS, white exclamation marks in a black circle appear over top of some of desktop icons. What is the cause of this and is there a fix?

tea for one
November 7th, 2020, 09:21 PM
Please note this comment in the release notes for Lubuntu 20.04.

Note, due to the extensive changes required for the shift in desktop environments, the Lubuntu team does not support upgrading from 18.04 or below to any greater release. Doing so will result in a broken system. If you are on 18.04 or below and would like to upgrade, please do a fresh install.

https://lubuntu.me/focal-1-released/

guiverc
November 8th, 2020, 12:17 AM
I would explore the properties of the desktop icons, the "!" usually indicates an error or misconfiguration of some sort that needs correction.

GhX6GZMB
November 9th, 2020, 10:58 PM
Right-click on each icon and tick "Trust this executable".

Problem solved.