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Difference between revisions of "KDE Plasma 5"

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'''The aim of this guide is to detail the steps required to complete a default installation of KDE Plasma 5 on x86 architectures. It assumes the initial completion of the [[Install]] guide.'''
'''The aim of this guide is to detail the steps required to complete a default installation of KDE Plasma 5 on x86 architectures. It assumes the initial completion of the [[Install]] guide.'''
To install the KDE SC 4 instead see the page [[KDE SC 4]]. Development of KDE SC 4 has mostly concluded.
__TOC__


== Pre-Installation ==
== Pre-Installation ==
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=== Install the X Window System ===
=== Install the X Window System ===
KDE requires the [https://en.wikipedia.org/wiki/X_Window_System X Window System (X11)] to present graphics (video) and receive input (keyboard, mouse, joystick, etc.). Configuration is required for X11 to work with the video card on the target hardware. Use the [[Video]] guide to determine the appropriate VIDEO_CARDS entry for Funtoo Linux. With your favorite editor, edit {{f|make.conf}} to include the setting appropriate for the target video hardware.
KDE uses the [https://en.wikipedia.org/wiki/X_Window_System X Window System (X11)] to present graphics (video) and receive input (keyboard, mouse, joystick, etc.). Install the X Window System by merging the meta-package {{Package|x11-base/xorg-x11}}
 
{{file|name=/etc/portage/make.conf|desc=example for Intel HD Graphics|body=
VIDEO_CARDS="intel i965"
}}
 
Now install the X Window System by merging the meta-package {{Package|x11-base/xorg-x11}}


{{console|body=
{{console|body=
###i## emerge --ask --verbose x11-base/xorg-x11
###i## emerge --ask --verbose x11-base/xorg-x11
}}
}}
Note that Wayland is a possible alternative to the X Window System. This page needs to be updated to describe what to do to use wayland.


=== Localization ===
=== Localization ===
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{{2Col|{{c|kde-apps/kdeaccessibility-meta}}|Applications providing Accessibility features such as text-to-speech and screen magnification.}}
{{2Col|{{c|kde-apps/kdeaccessibility-meta}}|Applications providing Accessibility features such as text-to-speech and screen magnification.}}
{{2Col|{{c|kde-apps/kdeadmin-meta}}|System log viewer (ksyslog) and Task Scheduler (kcron).}}
{{2Col|{{c|kde-apps/kdeadmin-meta}}|System log viewer (ksyslog) and Task Scheduler (kcron).}}
{{2Col|{{c|kde-apps/kdeartwork-meta}}|Additional wallpapers, themes and icons for Plasma.}}
{{2Col|{{c|kde-apps/kdebase-meta}}|Various base utilities for Plasma.}}
{{2Col|{{c|kde-apps/kdebase-runtime-meta}}|Various base utilities for Plasma.}}
{{2Col|{{c|kde-apps/kdecore-meta}}|File manager (Dolphin), Terminal Emulator (Konsole) and other basic applications. '''Recommended.'''}}
{{2Col|{{c|kde-apps/kdecore-meta}}|File manager (Dolphin), Terminal Emulator (Konsole) and other basic applications. '''Recommended.'''}}
{{2Col|{{c|kde-apps/kdeedu-meta}}|Education-related applications covering topics such as mathematics and geography.}}
{{2Col|{{c|kde-apps/kdeedu-meta}}|Education-related applications covering topics such as mathematics and geography.}}
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{{2Col|{{c|kde-apps/kdenetwork-meta}}|Remote desktop viewers, download manager and other networking utilities.}}
{{2Col|{{c|kde-apps/kdenetwork-meta}}|Remote desktop viewers, download manager and other networking utilities.}}
{{2Col|{{c|kde-apps/kdesdk-meta}}|Software Development Kit (SDK) tools for KDE.}}
{{2Col|{{c|kde-apps/kdesdk-meta}}|Software Development Kit (SDK) tools for KDE.}}
{{2Col|{{c|kde-apps/kdetoys-meta}}|A "desktop-dwelling creature" (AMOR) and screensaver featuring Tux.}}
{{2Col|{{c|kde-apps/kdeutils-meta}}|Various utility applications including a calculator (kcalc), free disk space utility (kdf) and archiving tool (ark).}}
{{2Col|{{c|kde-apps/kdeutils-meta}}|Various utility applications including a calculator (kcalc), free disk space utility (kdf) and archiving tool (ark).}}
{{2Col|{{c|kde-apps/kdewebdev-meta}}|Web development utilities.}}
{{2Col|{{c|kde-apps/plasma-telepathy-meta}}|Plasma Telepathy Client for instant messaging.}}
{{2Col|{{c|kde-apps/plasma-telepathy-meta}}|Plasma Telepathy Client for instant messaging.}}
{{TableEnd}}
{{TableEnd}}
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=== OpenRC ===
=== OpenRC ===
After the many packages have been merged portage will present a variety of post-install messages. A number of these will request that critical services are started first in order for KDE to work. Typically these are ALSA ({{Package|media-libs/alsa-lib}}), ConsoleKit ({{Package|sys-auth/consolekit}}), DBus ({{Package|sys-apps/dbus}}), and UDev ({{Package|sys-fs/eudev}}). Since the ''desktop'' flavor has been set CUPS ({{Package|net-print/cups}}) will also be included.
After the many packages have been merged portage will present a variety of post-install messages. A number of these will request that critical services are started first in order for KDE to work. Typically these are DBus ({{Package|sys-apps/dbus}}), Elogind ({{Package|sys-auth/elogind}}) and UDev ({{Package|sys-fs/eudev}}). Since the ''desktop'' flavor has been set CUPS ({{Package|net-print/cups}}) will also be included.


Issue the following commands to set these essential services to start automatically via OpenRC (sys-apps/openrc)
Issue the following commands to set these essential services to start automatically via OpenRC (sys-apps/openrc)


{{console|body=
{{console|body=
###i## rc-update add alsasound boot
###i## rc-update add cupsd default
###i## rc-update add cupsd default
###i## rc-update add consolekit default
###i## rc-update add dbus default
###i## rc-update add elogind default
}}
}}


DBus is usually started when these services start.
Udev is usually rebuilt during an install of KDE due to changes in USE flags from changing Profile flavor and mix-ins. To accommodate changes it is best to restart the service.
 
UDev is usually rebuilt during an install of KDE due to changes in USE flags from changing Profile flavor and mix-ins. To accommodate changes it is best to restart the service.


{{console|body=
{{console|body=
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The recommended [https://en.wikipedia.org/wiki/X_display_manager_(program_type) Display Manager] for KDE Plasma 5 is SDDM - {{Package|x11-misc/sddm}}. Installing KDE Plasma 5 with the ''kde-plasma-5'' mix-in installs SDDM.
The recommended [https://en.wikipedia.org/wiki/X_display_manager_(program_type) Display Manager] for KDE Plasma 5 is SDDM - {{Package|x11-misc/sddm}}. Installing KDE Plasma 5 with the ''kde-plasma-5'' mix-in installs SDDM.


A few steps must first be completed in order for SDDM to work correctly . The first step is to create a configuration file for SDDM as one is not created automatically. Generate one using the following command
A few steps must first be completed in order for SDDM to work correctly.
 
First, allow SDDM access the video hardware. This is achieved by adding the user ''sddm'' to the group ''video'' with the following command


{{console|body=
{{console|body=
###i## sddm --example-config > /etc/sddm.conf
###i## gpasswd -a sddm video
}}
}}


The configuration file now exists at {{f|/etc/sddm.conf}}. Edit this file with your favorite editor, changing the option 'Current' to be equal to 'breeze' - the KDE Plasma 5 default theme.
Second, add <code>pam_elogind.so</code> to pam folder so sddm can make use of it.  
 
{{file|name=/etc/sddm.conf|desc=Change the line Current= |body=
 
[Theme]
# Current theme name
Current=breeze
 
}}
 
Next it is required to allow SDDM access the video hardware. This is achieved by adding the user ''sddm'' to the group ''video'' with the following command
 
{{console|body=
{{console|body=
###i## gpasswd -a sddm video
###i## echo "session optional pam_elogind.so" >> /etc/pam.d/sddm-greeter
}}
}}


The final steps involve configuring OpenRC to load SDDM during startup.
Finally, configure OpenRC to load SDDM during startup.


Edit {{f|/etc/conf.d/xdm}} with your favorite editor, updating the DISPLAYMANAGER entry to equal 'sddm'.
Edit {{f|/etc/conf.d/xdm}} with your favorite editor, updating the DISPLAYMANAGER entry to equal 'sddm'.
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Another option is the application {{c|kde-misc/yakuake}} is a Quake-style terminal emulator based on Konsole. (Yakuake installs Konsole as a dependency.)
Another option is the application {{c|kde-misc/yakuake}} is a Quake-style terminal emulator based on Konsole. (Yakuake installs Konsole as a dependency.)


=== How to make GTK+ Applications use the same style/theme as Plasma 5 ===
=== How to Control the Appearance of GTK+ Applications under Plasma 5 ===
{{important|This content is work-in-progress!}}
The package {{c|kde-plasma/kde-gtk-config}} introduces an option under ''System Settings'' in Plasma 5 to control the theme of GNOME/GTK-based applications. The package {{c|kde-plasma/breeze-gtk}} is the Plasma 5 theme ''breeze'' for GTK+ applications.


Need kde-plasma/kde-gtk-config, kde-plasma/breeze-gtk. These are a dependencies of plasma-meta with USE ''gtk''.
The easiest way to introduce these features to Plasma 5 is to install {{c|kde-plasma/plasma-meta}} with the USE '''gtk''' enabled. This can be achieved by editing (with ''root'' privileges) the file {{f|/etc/portage/package.use}} to add the following line
{{file|name=/etc/portage/package.use|body=
kde-plasma/plasma-meta gtk
}}


Edit package.use
Once this is done re-emerge plasma-meta to install the GTK+ features
Emerge
{{console|body=
###i## emerge -av plasma-meta
}}


Go to ''System Settings>Application Style>GNOME Application Style (GTK)''
To control the theme of GTK+ applications, go to ''System Settings'' > ''Application Style'' > ''GNOME Application Style (GTK)''.


=== Alternatives to the Application Launcher ===
=== Alternatives to the Application Launcher ===
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=== Use LightDM as an alternative Display (Login) Manager ===
=== Use LightDM as an alternative Display (Login) Manager ===
{{important|This content is work-in-progress!}}
It is possible to use the display (login) manager '''LightDM''' instead of the default manager, SDDM.
 
General instructions on how to install and configure LightDM can be found on the page {{Package|x11-misc/lightdm}}.
 
{{Tip|Perform the following in a terminal ''outside'' of a running X-session!


edit /etc/portage/package.use > "kde-plasma/plasma-meta -sddm"
For example, at the physical machine first log out of Plasma 5. Using a keyboard switch to the first virtual terminal with the key combination Ctrl+Alt+F1. Log into the terminal and with root privileges, stop SDDM and X11 with the command '''rc-service xdm stop'''. After the following steps, LightDM and X11 can be restarted with '''rc-service xdm start'''.}}


To remove the dependency on SDDM, edit {{f|/etc/portage/package.use}} with ''root'' privileges to add plasma-meta with the ''sddm'' USE disabled
{{file|name=/etc/portage/package.use|body=
kde-plasma/plasma-meta -sddm
}}
Re-emerge plasma-meta. This will install {{c|x11-misc/lightdm}} and the KDE-themed (KDE SC 4) LightDM greeter, {{c|x11-misc/lightdm-kde}} as dependencies.
{{console|body=
{{console|body=
###i## emerge -av kdebase-runtime-meta lightdm
###i## emerge -av plasma-meta
}}
}}


edit /etc/lightdm/lightdm.conf
The next task is to configure LightDM to use the KDE-themed greeter. Edit the lightdm configuration file so that the line ''greeter-session'' is uncommented and set to the KDE greeter
edit /etc/conf.d/xdm
 
{{file|name=/etc/lightdm/lightdm.conf|body=
...
greeter-session=lightdm-kde-greeter
...
}}
 
The final steps involve configuring OpenRC to load LightDM instead of SDDM during startup.
 
Edit {{f|/etc/conf.d/xdm}} with your favorite editor, updating the DISPLAYMANAGER entry to equal 'lightdm'.
 
{{file|name=/etc/conf.d/xdm|body=
DISPLAYMANAGER="lightdm"
}}
 
The display manager LightDM should appear at the end of computer boot instead of the previous display manager, SDDM.


== Troubleshooting ==
== Troubleshooting ==
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Applications within the Application Launcher will appear using the Plasma 5 icon theme ''Breeze''.
Applications within the Application Launcher will appear using the Plasma 5 icon theme ''Breeze''.
=== Application Launcher Menu Text Becomes Distorted ===
This seems a Font redering issue. In the System Settings menu, in the Fonts section, try setting the following options:
Use anti-aliasing: Enabled
Then click on "Configure..." and set:
Sub-pixel rendering type: RGB
Hinting style: Slight


=== Audio Volume Control Missing ===
=== Audio Volume Control Missing ===
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Emerge the Plasma mixer gui {{c|kde-apps/kmix}} on its own or as part of the multimedia meta-package, {{c|kde-apps/kdemultimedia-meta}}.
Emerge the Plasma mixer gui {{c|kde-apps/kmix}} on its own or as part of the multimedia meta-package, {{c|kde-apps/kdemultimedia-meta}}.


=== LibreOffice Icons and Menus Look Awful ===
=== Improve the Appearance of LibreOffice Menus and Toolbar Icons ===
{{important|This content is work-in-progress!}}
With KDE Plasma 5, LibreOffice (app-office/libreoffice) is built with the USE ''kde'' enabled. As a matter of taste some users may dislike the appearance of the menus and taskbar icons when this USE is enabled under Plasma 5. It is possible that this feature remains optimized for KDE SC 4, not Plasma 5.
 
One option is to installed LibreOffice with preference to the GTK+-based interface. This can then be themed to match the Plasma 5 theme, ''breeze''.
 
With ''root'' privileges, edit the file {{f|/etc/portage/package.use}} to add the following entries
 
{{file|name=/etc/portage/package.use|body=
app-office/libreoffice -kde
kde-plasma/plasma-meta gtk
}}
 
Now re-emerge plasma-meta to install the dependencies required when USE ''gtk'' is enabled.
{{console|body=
###i## emerge -av plasma-meta
}}


app-office/libreoffice with USE "kde" currently optimized for KDE SC 4, not Plasma 5
Finally, (re-)emerge LibreOffice
{{console|body=
###i## emerge -av libreoffice
}}


Add to package.use >
Follow the instructions under [[KDE#Tips_and_Tricks|Tips and Tricks]] to control the visual style of GTK+ applications, matching the other styles set under ''System Settings''.
"app-office/libreoffice -kde"
"kde-plasma/plasma-meta gtk"


Re-emerge plasma-meta
=== Wi-fi and Network icon ===
if the wi-fi icon is not displayed on the default panel you have to emerge plasma-nm.


Re-Emerge libreoffice
{{console|body=###i## emerge plasma-nm
}}


Configure Application Style>GTK
== External Links ==
== External Links ==


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[[Category:Desktop]]
[[Category:Desktop]]
[[Category:Official Documentation]]

Latest revision as of 18:41, November 3, 2022

KDE Plasma is a desktop environment developed by the KDE Community. KDE Plasma is based on the Qt framework. Funtoo Linux offers KDE Plasma together with a variety of Applications also from KDE. Through Qt and a common platform of libraries (KDE Frameworks), KDE Plasma combined with KDE Applications aims to deliver a desktop environment that is tightly integrated and visually consistent.

Funtoo Linux offers KDE Plasma 5, Applications and Frameworks.

The aim of this guide is to detail the steps required to complete a default installation of KDE Plasma 5 on x86 architectures. It assumes the initial completion of the Install guide.

Pre-Installation

The following instructions are written for a new installation of Funtoo Linux performed using the Install guide.

Funtoo Profiles

Correctly setting Funtoo Profiles is required to install KDE. Review the selected profiles using epro. 

root # epro show

=== Enabled Profiles: ===

        arch: x86-64bit
       build: current
     subarch: intel64-haswell
      flavor: core
     mix-ins: (not set)


=== All inherited flavors from core flavor: ===

                         minimal (from core flavor)

The recommended flavor for KDE is desktop. This can be selected with the command epro flavor desktop 

root # epro flavor desktop

=== Enabled Profiles: ===

        arch: x86-64bit
       build: current
     subarch: intel64-haswell
      flavor: desktop
     mix-ins: (not set)

>>> Set flavor to desktop.

Following a flavor change an update of Funtoo packages is required 

root # emerge --ask --update --verbose --deep --newuse --with-bdeps=y @world
   Tip

This command can be shortened to 

root # emerge -auvDN --with-bdeps=y @world

Install the X Window System

KDE uses the X Window System (X11) to present graphics (video) and receive input (keyboard, mouse, joystick, etc.). Install the X Window System by merging the meta-package No results 

root # emerge --ask --verbose x11-base/xorg-x11

Note that Wayland is a possible alternative to the X Window System. This page needs to be updated to describe what to do to use wayland.

Localization

To install KDE for a language other than English (United States) add an appropriate LINGUAS entry to /etc/portage/make.conf

   /etc/portage/make.conf - Example for English (United Kingdom)
LINGUAS="en_GB"
   Tip

More information on Localization can be found at Funtoo Linux Localization.

Emerge KDE Plasma 5

The Funtoo Profiles were earlier set to the desktop flavor. Now an additional mix-in profile is required to provide a smooth installation of KDE Plasma 5.

There are two KDE-related mix-ins available in Funtoo: kde and kde-plasma-5.

For KDE Plasma 5 the correct mix-in is "kde-plasma-5". DO NOT add "kde" instead of "kde-plasma-5" or add both at the same time - they are incompatible.

Add the mix-in using epro 

root # epro mix-in kde-plasma-5

=== Enabled Profiles: ===

        arch: x86-64bit
       build: current
     subarch: intel64-haswell
      flavor: desktop
     mix-ins: kde-plasma-5

>>> Added kde-plasma-5 mix-in.

Now KDE Plasma 5 can be merged.

This is performed by merging the package kde-plasma/plasma-meta. This will install the Plasma Desktop (KDE Plasma 5) and supporting libraries and services (KDE Frameworks, Qt, etc.).

Since the Profile has changed (added mix-in) the world set of packages must be updated as well. These actions can be performed in one step 

root # emerge -auvDN --with-bdeps=y @world kde-plasma/plasma-meta

Once completed continue on to the next chapter to install one or more KDE Applications. If this is not desired then instead proceed to the chapter Configure and Start KDE Plasma.

   Important

Installing kde-plasma/plasma-meta alone will result in a minimal desktop environment (KDE Plasma 5). Several key features of a desktop environment such as an integrated terminal emulator and file manager are NOT installed automatically with kde-plasma/plasma-meta.

Installing KDE Applications while optional is recommended.

Install KDE Applications (Optional)

In addition to the Plasma Desktop the KDE Community also produces a number of applications. These KDE Applications are designed to integrate well with the Plasma desktop, sharing the same underlying set of libraries and services (KDE Frameworks).

KDE Applications appear in the Portage Tree under the group 'kde-apps'. Applications of a similar theme have been grouped together into convenient 'meta-packages' to assist with installation. Currently the available KDE Applications meta-packages for Plasma 5 are:

meta-package ebuilddescription
kde-apps/kdeaccessibility-metaApplications providing Accessibility features such as text-to-speech and screen magnification.
kde-apps/kdeadmin-metaSystem log viewer (ksyslog) and Task Scheduler (kcron).
kde-apps/kdebase-metaVarious base utilities for Plasma.
kde-apps/kdecore-metaFile manager (Dolphin), Terminal Emulator (Konsole) and other basic applications. Recommended.
kde-apps/kdeedu-metaEducation-related applications covering topics such as mathematics and geography.
kde-apps/kdegames-metaSeveral games from the KDE Community.
kde-apps/kdegraphics-metaGraphics applications. Includes an image viewer (Gwenview) and document viewer (Okular).
kde-apps/kdemultimedia-metaMultimedia applications including a video/media player (Dragon) and editor (Kdenlive).
kde-apps/kdenetwork-metaRemote desktop viewers, download manager and other networking utilities.
kde-apps/kdesdk-metaSoftware Development Kit (SDK) tools for KDE.
kde-apps/kdeutils-metaVarious utility applications including a calculator (kcalc), free disk space utility (kdf) and archiving tool (ark).
kde-apps/plasma-telepathy-metaPlasma Telepathy Client for instant messaging.

These meta-packages can be installed one-by-one. For example, kde-apps/kdecore-meta: 

root # emerge -av kdecore-meta

There is also a meta-package for the KDE Applications collection - kde-apps/kde-apps-meta. Depending on the USE flags of the target system this package will install most (if not all) meta-packages from the table above, together with the advanced text editor Kate (kde-apps/kate): 

root # emerge -av kde-apps-meta
   Tip

There exists a meta-package kde-apps/kde-meta. With the mix-in kde-plasma-5 added, installing this package is equivalent to manually installing kde-plasma/plasma-meta followed by kde-apps/kde-apps-meta.

Once the final emerge has completed continue on to the next chapter to configure and start KDE Plasma.

Configure and Start KDE

OpenRC

After the many packages have been merged portage will present a variety of post-install messages. A number of these will request that critical services are started first in order for KDE to work. Typically these are DBus (sys-apps/dbus), Elogind (No results) and UDev (No results). Since the desktop flavor has been set CUPS (No results) will also be included.

Issue the following commands to set these essential services to start automatically via OpenRC (sys-apps/openrc) 

root # rc-update add cupsd default
root # rc-update add dbus default
root # rc-update add elogind default

Udev is usually rebuilt during an install of KDE due to changes in USE flags from changing Profile flavor and mix-ins. To accommodate changes it is best to restart the service. 

root # /etc/init.d/udev --nodeps restart
   Tip

Do not confuse the UDev package eudev (sys-fs/eudev) with evdev! evdev is the generic input device driver for the X Window System (x11-drivers/xf86-input-evdev)!

Create a User Account

Now is the appropriate point to create a user account for use with KDE Plasma. The following example creates a user alice and associates that account with the Groups lp, lpadmin, plugdev, users, video and wheel. A home directory for the account alice will be created at /home/alice. 

root # useradd -m -G games,lp,lpadmin,plugdev,users,video,wheel alice

Now set a password for alice 

root # passwd alice

Starting KDE with a Display (Login) Manager

The recommended Display Manager for KDE Plasma 5 is SDDM - x11-misc/sddm. Installing KDE Plasma 5 with the kde-plasma-5 mix-in installs SDDM.

A few steps must first be completed in order for SDDM to work correctly.

First, allow SDDM access the video hardware. This is achieved by adding the user sddm to the group video with the following command 

root # gpasswd -a sddm video

Second, add pam_elogind.so to pam folder so sddm can make use of it. 

root # echo "session optional pam_elogind.so" >> /etc/pam.d/sddm-greeter

Finally, configure OpenRC to load SDDM during startup.

Edit /etc/conf.d/xdm with your favorite editor, updating the DISPLAYMANAGER entry to equal 'sddm'.

   /etc/conf.d/xdm 
DISPLAYMANAGER="sddm"

Now add xdm to the default runlevel of OpenRC. 

root # rc-update add xdm default

The display manager SDDM should appear at the end of computer boot. To avoid an unnecessary restart you can launch SDDM/KDE from here with a simple command 

root # rc

You will be presented with a login screen. Input devices (mouse, keyboard) should be working at this stage. Logging in will take you to the KDE Plasma 5 desktop.

This concludes the basic installation of KDE Plasma on Funtoo Linux.

Tips and Tricks

KDE Applications - Internationalization

If installing KDE Applications via the meta-package kde-app/kde-apps-meta (or kde-apps/kde-meta) add the following line to /etc/portage/package.use

   /etc/portage/package.use 
kde-apps/kde-apps-meta nls

Then emerge kde-apps/kde-apps-meta (or kde-apps/kde-meta).

Dolphin File Manager

The KDE file manager for Plasma 5, Dolphin, is not installed by default with kde-plasma/plasma-meta.

Emerge the application kde-apps/dolphin on its own or as part of the meta-package kde-apps/kdecore-meta.

Plasma 5 Terminal Emulator (Konsole)

The terminal emulator from KDE for Plasma 5 is Konsole. This is not installed by default with kde-plasma/plasma-meta.

Konsole can be installed on its own (emerge kde-apps/konsole) or as part of the meta-package kde-apps/kdecore-meta.

Another option is the application kde-misc/yakuake is a Quake-style terminal emulator based on Konsole. (Yakuake installs Konsole as a dependency.)

How to Control the Appearance of GTK+ Applications under Plasma 5

The package kde-plasma/kde-gtk-config introduces an option under System Settings in Plasma 5 to control the theme of GNOME/GTK-based applications. The package kde-plasma/breeze-gtk is the Plasma 5 theme breeze for GTK+ applications.

The easiest way to introduce these features to Plasma 5 is to install kde-plasma/plasma-meta with the USE gtk enabled. This can be achieved by editing (with root privileges) the file /etc/portage/package.use to add the following line

   /etc/portage/package.use 
kde-plasma/plasma-meta gtk

Once this is done re-emerge plasma-meta to install the GTK+ features 

root # emerge -av plasma-meta

To control the theme of GTK+ applications, go to System Settings > Application Style > GNOME Application Style (GTK).

Alternatives to the Application Launcher

The application-launching widget on the default panel in Plasma 5 is the Application Launcher. The widget icon is the letter K on top of a cog/gear.

Plasma 5 offers three different launchers:

Widgetdescription
Application DashboardA fullscreen application launcher. This is the new application launcher found in Plasma 5. Arguably the best launcher for touchscreen devices.
Application LauncherLauncher to start applications. This is similar to the default launcher in KDE SC 4. This is the default launcher with kde-plasma/plasma-meta.
Application MenuA launcher based on cascading popup menus. This is similar to the application launcher that was present in KDE 3.x.

To change the widget, right-click on the widget and select Alternatives. Choose the desired widget and then left-click on Switch. If the option Alternative was not available, instead select Unlock Widgets, then start again.

Use LightDM as an alternative Display (Login) Manager

It is possible to use the display (login) manager LightDM instead of the default manager, SDDM.

General instructions on how to install and configure LightDM can be found on the page x11-misc/lightdm.

   Tip

Perform the following in a terminal outside of a running X-session!

For example, at the physical machine first log out of Plasma 5. Using a keyboard switch to the first virtual terminal with the key combination Ctrl+Alt+F1. Log into the terminal and with root privileges, stop SDDM and X11 with the command rc-service xdm stop. After the following steps, LightDM and X11 can be restarted with rc-service xdm start.

To remove the dependency on SDDM, edit /etc/portage/package.use with root privileges to add plasma-meta with the sddm USE disabled

   /etc/portage/package.use 
kde-plasma/plasma-meta -sddm

Re-emerge plasma-meta. This will install x11-misc/lightdm and the KDE-themed (KDE SC 4) LightDM greeter, x11-misc/lightdm-kde as dependencies. 

root # emerge -av plasma-meta

The next task is to configure LightDM to use the KDE-themed greeter. Edit the lightdm configuration file so that the line greeter-session is uncommented and set to the KDE greeter

   /etc/lightdm/lightdm.conf 
...
greeter-session=lightdm-kde-greeter
...

The final steps involve configuring OpenRC to load LightDM instead of SDDM during startup.

Edit /etc/conf.d/xdm with your favorite editor, updating the DISPLAYMANAGER entry to equal 'lightdm'.

   /etc/conf.d/xdm 
DISPLAYMANAGER="lightdm"

The display manager LightDM should appear at the end of computer boot instead of the previous display manager, SDDM.

Troubleshooting

Application Launcher Icons Displayed with Incorrect Theme

Following a fresh install of kde-plasma/plasma-meta, application icons within the default Application Launcher appear using the Oxygen icon theme. The Oxygen theme is synonymous with KDE SC 4, while a new theme was created by KDE for Plasma 5 - Breeze. By default Plasma 5 is set to use the Breeze theme for icons.

Using the Application Launcher, browse to and open the application System Settings. Alternatively, use the key combination Alt+F2 to open a run menu and search for System Settings.

Under the System Settings menu open Icons found within the Appearance group. The tab Theme will indicate that the currently selected theme is Breeze. Re-select this theme: either double left-click with the mouse pointer or use arrow keys to deselect/re-select. Update the icon theme with the Apply button. Close System Settings.

Applications within the Application Launcher will appear using the Plasma 5 icon theme Breeze.

Application Launcher Menu Text Becomes Distorted

This seems a Font redering issue. In the System Settings menu, in the Fonts section, try setting the following options:

Use anti-aliasing: Enabled

Then click on "Configure..." and set:

Sub-pixel rendering type: RGB

Hinting style: Slight

Audio Volume Control Missing

Audio controls are not installed with kde-plasma/plasma-meta.

Emerge the Plasma mixer gui kde-apps/kmix on its own or as part of the multimedia meta-package, kde-apps/kdemultimedia-meta.

Improve the Appearance of LibreOffice Menus and Toolbar Icons

With KDE Plasma 5, LibreOffice (app-office/libreoffice) is built with the USE kde enabled. As a matter of taste some users may dislike the appearance of the menus and taskbar icons when this USE is enabled under Plasma 5. It is possible that this feature remains optimized for KDE SC 4, not Plasma 5.

One option is to installed LibreOffice with preference to the GTK+-based interface. This can then be themed to match the Plasma 5 theme, breeze.

With root privileges, edit the file /etc/portage/package.use to add the following entries

   /etc/portage/package.use 
app-office/libreoffice -kde
kde-plasma/plasma-meta gtk

Now re-emerge plasma-meta to install the dependencies required when USE gtk is enabled. 

root # emerge -av plasma-meta

Finally, (re-)emerge LibreOffice 

root # emerge -av libreoffice

Follow the instructions under Tips and Tricks to control the visual style of GTK+ applications, matching the other styles set under System Settings.

Wi-fi and Network icon

if the wi-fi icon is not displayed on the default panel you have to emerge plasma-nm. 

root # emerge plasma-nm

External Links

KDE.org - www.kde.org

KDE Plasma Desktop - www.kde.org/workspaces/plasmadesktop/

KDE Applications - www.kde.org/applications/

Gentoo Linux Wiki - wiki.gentoo.org/wiki/KDE

Phoronix - "KDE Plasma 5.5: The Quintessential 2016 Review" - http://www.phoronix.com/scan.php?page=article&item=kde-2016-review&num=1

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