Plasma 5 Notifications In Wrong Locations

I use a version of Linux on the one of my computers named ‘Plato’, that has Debian / Stretch as its base, but which also has Plasma 5 as its desktop manager. This was a system which I created from a Kanotix Live DVD, from before Kanotix had an official Debian / Stretch release. According to that Live Disk, the desktop manager was LXDE !  LXDE stands for “Lightweight X Desktop Environment”, while Plasma 5 is the successor to KDE 4, and is a powerful, CPU-consuming desktop manager. In the meantime, Kanotix has created two official ‘Stretch’ releases, one with LXDE and one with Plasma 5, both named ‘Kanotix Steelfire’.

What I felt I needed to do with Plato, was to install Plasma 5 via the package manager, even though the Kanotix developers had not yet done so. This customized Plasma 5 environment has been running fine for some time.

But only recently, after my email client – Thunderbird – received an update to version 60.x, I did notice that some of my desktop notifications seemed a little odd. Instead of appearing as official Plasma / KDE notifications, they appeared either as stylized bubbles, or as more-boring drop-down lists from the center, of the top, of my screen. And so this can lead to some confusion, or to some doubt in whether the system is still stable. In fact, I’ve read some other complaints from the Web, of people who ran in to the same behavior exactly. What seemed to irk them as well as me most, was that although we can use our KDE / Plasma Notification settings to designate, where we want notifications to appear, these apparently rogue notifications seem to disregard this setting.

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Why the Linux guest-system, on my Linux-tablet, is only a shell.

According to some of my own postings, I possess an old Android-based tablet, which is a Samsung Galaxy Tab S, first generation, onto which I installed a Linux guest-system, using the Android apps “GNURoot (Debian)” and “XSDL”, both available from Google Play. The latter of these apps emulates a simple X-server, which Linux-programs running under the first app can make use of.

The desktop-manager which I chose to use for my Linux guest-system is LXDE, precisely because that desktop-manager does not strictly require that Linux-based daemons be running.

But there are certain standard, LXDE-features which will not even work on that setup:

  • The Trash Bin
  • The LXDE-Settings Panel
  • (etc.)

The LXDE Trash Bin requires the package ‘gvfs’, and the Settings Panel requires the package ‘lxde-settings-daemon’. Both these dependencies launch daemons – i.e., programs that run in the background, and that make up part of a real Linux-session.

The ability to run daemons, essentially, requires that the user have a rooted tablet. Because I never rooted my tablet, I am without any daemons, that would normally belong to any Linux guest-system.

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Debian Category Missing From Plasma Menu.

I use several Linux-based computers, which include an older machine running Debian / Jessie and the KDE 4 desktop manager, and a more-recently-installed machine, running Debian / Stretch and the Plasma 5.8 desktop manager.

Under KDE 4 – which I’ve grown used to over the years – the K-Menu – aka, the Application Launcher – would display a nested menu-system, that included the KDE categories into which applications should fit, which are defined essentially by ‘.desktop’ files, plus a separate category called ‘Debian’, which was denoted by a folder-icon, and which was nested several levels deep, into which almost every installed application should be sortable, defined essentially by the contents of the directory ‘/usr/share/menu’.

k-menu_1s

Under my Plasma 5.8 setup, one fact which I was missing, was the earlier presence of this Debian -category:

k-menu_2s

 

Instead, this computer has a larger abundance of entries, in its Lost+Found category (not shown), which is really just another way of saying, ‘entries which it cannot otherwise put into categories’. In fact, many of the entries that now occur under Lost+Found, also occur under listed categories.

(Updated 12/14/2017 : )

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