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===== Nvidia Driver for ubuntu 12.04 and 12.10. =====

<HTML>
Warning! Use this instruction at you own risk! 
You should definitly know what are you doing 
(especially at "Fix kernel cmdline" section) else 
you may get unbootable or broken system! 

</HTML>

==== ubuntu 12.04 ====
=== Fix kernel cmdline for 3.1.10 kernel ===
**Important!** For ubuntu 12.04 you should add **console=tty1** to **cmdline** parameters in **/boot/bootimg.cfg**

This line need to be changed to this state (just example, not a working config):
<code>
cmdline = mem=512M@0M tergapart=something root=UUID=anothersomething quiet splash console=tty1
</code>
Open **/boot/bootimg.cfg** in you text editor and make changes.

Next download and install 3.1.10 kernel
<code bash>
wget http://launchpadlibrarian.net/118260107/linux-image-3.1.10-6-ac100_3.1.10-6.9_armhf.deb
sudo dpkg -i linux-image-3.1.10-6-ac100_3.1.10-6.9_armhf.deb
</code>

==== ubuntu 12.04 ====
Just check you kernel version. It should be 3.1.10-6.9 or newest.
<code bash>
dpkg -l | grep linux-image-3.1.10
</code>
Update it if nessesary
<code bash>
sudo apt-get install linux-image-ac100
</code>
==== Install nvidia-tegra drivers====

First, remove previous installation if nvidia-tegra

<code bash>
sudo apt-get purge nvidia-tegra
sudo update-alternatives --remove arm-linux-gnueabi_egl_conf /usr/lib/nvidia-tegra/ld.so.conf
sudo update-alternatives --remove-all nvidia_drv
</code>

Then download and install new codecs and driver packages.
<code bash>
wget http://flie.no-ip.org:7080/ac100/deb/nvidia-tegra-ventana-codecs_16.0.0-0ubuntu1_armhf.deb
wget https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-tegra/16.2.0-0ubuntu3/+build/3907865/+files/nvidia-tegra_16.2.0-0ubuntu3_armhf.deb
sudo dpkg -i nvidia-tegra_16.2.0-0ubuntu3_armhf.deb nvidia-tegra_16.2.0-0ubuntu3_armhf.deb
</code>

If you prefer you own kernel, inspect that you have CONFIG_TEGRA_AVP_KERNEL_ON_MMU=y and "CONFIG_TEGRA_NVAVP is not set" in kernel config.

==== Gstreamer tuninig ====

**gstreamer-properties** its a part of gnome-media package.
Run

<code>gstreamer-properties</code>

Insert parameters **nv_omx_audiosink** and **nvxvimagesink** to its place

(Button **Test** prodice "could not link ffmpegcsp0 to nvxvimagesink2" error, its dont work with this driver for some reason)

==== Finally ====

<code>sudo reboot</code>

Done! Now you can run totem and play videos with relativly high cpu load. At this time window and fullscreen playback working in totem.
[[http://www.dvdloc8.com/clip.php?movieid=12167&clipid=1|Example video - h264 720p trailer]]
Should play smoothly in totem, and you can compare it with mplayer -vo x11.

=== Totem keyboard shortcuts: ===
<code>
 F1 - Help
 F9 - Properties
 F11 - Full Screen
 q - Quit
 r - Zoom In
 t - Zoom Out
 o - Open
 p - Pause
 a - Change Format
 f - (see F11)
 h - Show/Hide Controls
 > - Frame Advance from pause (This is the one I was looking for!!)
 < - Return to pause point from frame advance
 → - Advance 1 min
 SHIFT → - Advance 15 secs
 ← - Back 15 secs
 SHIFT ← - Back 5 secs
 ↑ - Volume up
 ↓ - Volume down
</code>

Also, there is some other ways to play video inside window
<code>
nvgstplayer -i file:///media/TOS_AC_AZ/Videos/example.avi --svs="nvxvimagesink"

gst-launch-0.10 playbin2 uri=file:///media/TOS_AC_AZ/Videos/example.avi video-sink=nvxvimagesink audio-sink=nv_omx_audiosink
</code>
for nvgstplayer run programm from terminal and leave focus on it to have control keys.

Check permissions and owners of /dev/nv* files if any problems. It should be 0660 root:video.

==== OpenGLESv2 ====
Also, you can install packages **mesa-utils-extra** and **glmark2-es2** to look at movings gears
<code>
es2gears
</code>
or run more complex benchmark
<code>
glmark2-es2
</code>
There is some [[games|]] [[http://ac100.wikispaces.com/%D0%98%D0%B3%D1%80%D1%8B|(even more games on russian wiki)]] running on ac100 via GLES2
Also check WebGL [[http://www.khronos.org/webgl/wiki/Demo_Repository]] in chromium running as
<code>chromium-browser ----use-gl=egl</code>

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