Linux Mint's purpose is to produce an elegant, up-to-date, and comfortable GNU/Linux desktop based on Ubuntu. Some of the reasons for the success of Linux Mint are:
It's one of the most community driven distributions
It is a Debian-based distribution and as such it is very solid and it comes with one of the greatest package managers
It is compatible with and uses Ubuntu repositories. This gives Linux Mint users access to a huge collection of packages and software.
It comes with a lot of desktop improvements which make it easier for the user to do common things
There is a strong focus on making things work out of the box (WiFi cards drivers in the file system, multimedia support, screen resolution, etc)
New features in Linux Mint 17.3 KDE
Linux Mint 17.3 is a long term support release which will be supported until 2019. It comes with updated software and brings refinements and many new features to make your desktop experience more comfortable to use.
Software repositories are very important. We use them all the time when installing new software or performing updates. They need to be fast and reliable. This was a major point of focus in the development of Linux Mint 17.3.
Software repositories are mirrored (i.e. duplicated on many servers) all over the world. The main goal of the Software Sources configuration tool is to make it easy to find the best available mirror for you; one that is:
To find the fastest mirrors, the Software Sources tool now detects your location and starts its speed tests with mirrors near you.
Mirrors from your own country are tested first, then from neighbouring countries and finally from your sub-region and region of the world.
Say you live in the Netherlands, mirrors are tested in this order: Dutch mirrors first, then Belgian and German mirrors, Western European mirrors next, and then finally mirrors from all over Europe.
Speed tests are also much more accurate than before. They're performed one after another and on larger files (to get more precision while measuring speed).
Finally, the Software Sources tool is more reliable than before:
The Update Manager now also performs more checks than before.
It warns you if the mirror you're using is not up to date:
It prevents you from damaging the system if that mirror (or your local cache) is corrupted:
And it shows a little hint even when everything is fine if faster mirrors are available:
The local cache used to be refreshed every 30 minutes. It is now refreshed 10 minutes after you log in, and every 2 hours then after. Both settings are configurable.
The Driver Manager is more robust than before. It refreshes the cache before looking for drivers and reports update and installation errors if appropriate.
Drivers are now sorted by status and the Driver Manager now indicates if drivers are Open Source or not.
The Driver Manager now also loads much faster and detects drivers in the background.
When a Broadcom chipset is detected, along with the recommended Broadcom STA drivers, the Driver Manager now also lists B43 installers (note that these options do require an Ethernet connection).
HiDPI support was improved in the MDM display manager.
Many HiDPI related issues were fixed, in particular with HD TVs plugged over HDMI.
The way HiDPI support works in MDM was also redesigned. It used to double the pixel density on HiDPI displays and that sometimes resulted in a login screen that looked too big on some HiDPI monitors. It now works towards an ideal pixel density, so the scaling ratio isn't just 1x or 2x but an appropriate calculated value in between.
To improve the support for touchscreens and mobile devices, an on-screen keyboard was also added in the login screen. This keyboard is available for the default theme ("Mint-X") and it provides both common and special characters.
Xorg, Mesa and the Linux kernel were upgraded.
In many cases, this improves hardware support. Imacs for instance no longer need to use nomodeset, scrolling is now functional on some Asus touchpads, suspending is much faster on macbooks...etc.
Kernel 4.2.0 is also available in the repositories. However please be cautious with it if you are using proprietary drivers. At the moment, the following drivers are known not to work with it:
Support for these drivers with kernel 4.2.0 should improve before February 2016.
All the backgrounds from Linux Mint "Qiana", "Rebecca" and "Rafaela" are also present.
The welcome screen was redesigned slightly.
LibreOffice was upgraded to version 5.
Inxi was upgraded and now supports multiple graphics cards.
When using an encrypted home directory, memory swap is no longer encrypted by default and hibernation works out of the box.
Linux Mint 17.3 features KDE 4.14, MDM 2.0, a Linux kernel 3.19 and an Ubuntu 14.04 package base.
Linux Mint 17.3 will receive security updates until 2019.
Until 2016, future versions of Linux Mint will use the same package base as Linux Mint 17.3, making it trivial for people to upgrade.
Until 2016, the development team won't start working on a new base and will be fully focused on this one.