Dropbox does start upon startup. The issue seems more to be with the icon displaying properly in the system tray. It seems to display OK upon a true startup. After a suspend/wake with my laptop, it often appears as the three dots, but sometimes appears as a normal icon.
I’m pretty sure its functionality continues, regardless.
Another note is that when I issue a “dropbox stop” command from the terminal, I receive an warning about its use of isSet():
/usr/bin/dropbox:614: DeprecationWarning: isSet() is deprecated, use is_set() instead
if self.stop_event.isSet(): break
When I issue the command “dropbox start” from the terminal, Dropbox does start, but I receive the following error message:
dropbox: load fq extension ‘/home/richard/.dropbox-dist/dropbox-lnx.x86_64-148.4.4519/PyQt5.QtDBus.cpython-38-x86_64-linux-gnu.so’
Gtk-Message: 09:24:24.912: Failed to load module “xapp-gtk3-module”
(dropbox:93715): LIBDBUSMENU-GLIB-WARNING **: 09:24:25.018: About to Show called on an item wihtout submenus. We’re ignoring it.
Seems to me that Dropbox needs to update their code for Linux, or maybe there’s a problem with Ubuntu 22.04 that needs patching. The most recent version of Dropbox’s Linux code is from 2020, as far as I can tell.