Public bug reported:
Steps to reproduce:
1) sudo apt install virtualbox
2) See that it doesn't appear in the menus
3) To make it appear, run any ONE of the following actions:
3a) Logout/login
3b) Or run: mate-panel --reset
3c) Or fake any menu file modification to cause a rescan:
sudo sed 's/a/a/' -i /usr/share/applications/mate-calc.desktop
This isn't a problem in the VirtualBox packaging. All other desktop
environments correctly show its menu. It's a race condition that affects
other packages as well; I'll try to explain it below.
When installing virtualbox, the following things happen:
1) The virtualbox package is unpacked and it provides a binary at
/usr/share/virtualbox/VBox.sh.
2) The virtualbox-qt package is unpacked and it provides the menu at
/usr/share/applications/virtualbox.desktop.
3) MATE scans for menu changes. It sees that virtualbox.desktop contains this
line: TryExec=VirtualBox
It tries to locate a VirtualBox binary, and fails because it doesn't exist yet.
It marks that menu as invalid.
4) A split second later the virtualbox-qt installation continues and the
debhelper code that corresponds to `debian/virtualbox-qt.links` creates the
`/usr/share/virtualbox/VBox.sh /usr/bin/VirtualBox` symlink and makes the
VirtualBox binary available.
So the menu doesn't show up because it was marked as "missing executable" at
step (3); it will show up if we ping the backend to scan the menus once more.
The solution would be to postpone the backend scanning for a second, when the
symlink will exist.
Note that even though brisk-menu defines `BRISK_RELOAD_TIME 2000`, I think this
isn't appropriate because it re-uses the wrong backend information from 2
seconds ago, when the symlink was missing.
** Affects: mate-panel (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1967728
Title:
Some packages need a restart to appear in the menu
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