## ‌A few important notes.‌

‌While the experience is visually similar to the desktop edition of Ubuntu MATE, the underlying architecture is very different. This page will highlight a few of these differences.‌

### ‌Resizing the file system‌

‌Your file system has already been resized.‌

‌After setting up Ubuntu MATE for the first time on your Raspberry Pi, the file system will be restricted to the size of the original image, which is about 3.9 GB. Use this button to resize and fill the entire Micro-SD card.‌

‌To complete the resize of your Raspberry Pi file system, please close all open windows and restart now.‌

### ‌Incompatible Software‌

‌Some packages available for Ubuntu have only been written and compiled for the‌ `i386` ‌or‌ `amd64` ‌architecture. As the Raspberry Pi is based on‌ `armv7`, ‌these packages will not be available to install. Depending on the package, it may be possible to compile these yourself or use an existing port.‌

##### ‌Incompatible:‌

- Google Chrome
- Minecraft (Java Edition)
- Adobe Flash
- VirtualBox

##### ‌Compatible:‌

- Chromium
- Minecraft: Pi Edition
- QEMU

### ‌Upgrades‌

‌Please‌ ‌do not‌ ‌attempt to‌ ‌upgrade‌ ‌your Raspberry Pi to a newer version of the distribution (for instance, from 15.04 to 15.10), as the underlying kernel is‌ ‌not designed‌ ‌to do this. This process will take a very long time to complete while potentially filling up your SD card to a point where there is no more free space.‌

‌It is safer to back up all of your data you wish to keep and re-flash the card with the new image. Attempting to upgrade may corrupt the SD card, prevent your installation from booting, or cause severe glitches.‌

‌You can, however, install‌ ‌regular updates‌ ‌via the‌
‌utility for your installed software.‌

### ‌Kernel Updates‌

‌The same kernel provided by the‌
‌is used in this edition of Ubuntu MATE. As this kernel is delivered like a "firmware" blob, updates are not distributed via the‌
‌or‌ apt-get.

‌Instead, to update the kernel, open a terminal and run:‌

> `sudo rpi-update`

### ‌Hardware Acceleration‌

‌Currently, hardware accelerated applications are‌ ‌not supported‌ ‌unlike‌
. ‌Applications that depend on OpenGL ES libraries or require the GPU will fail to start.‌

‌For playing videos, the application‌ `omxplayer` ‌will be able to do this and is pre-installed. If you are looking to play MPEG-2 or VC-1 video files then‌ ‌you will need MPEG-2 and/or VC-1 licenses from the‌

### ‌Enable/Disable X11‌

‌For users who are looking to create their own headless‌ ‌"server"‌ ‌using Ubuntu MATE, there is a utility for toggling the graphical environment.‌

‌To disable X11 and login via the console:‌

> `sudo graphical disable`

‌To enable X11 to restore the Ubuntu MATE desktop:‌

> `sudo graphical enable`

‌Changes take effect after a reboot.‌

### ‌Release Notes‌

‌To read up on release notes and changes by version, visit the Ubuntu MATE website.‌

‌Raspberry Pi is a trademark of the ‌
.