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==Troubleshooting==
* Using a PCI or ISA video card, your screen display nothing. First of all, if you have an onboard card, disable it in the bios.
== You passed an undefined mode number==
To avoid the appearance of this message and waiting 3s,
use the generator and try selecting a different video
resolution and/or colour depth. Note that for TV output,
the supported modes are very often a lot more limited
than those for the VGA output. Your h/w documentation
may provide information as to which modes are supported
for your card, or otherwise try reducing the resolution
and colour depth until you find a mode that works.
== ATI Rage(m64) screen black after mplayer start ==
try modify etc/mplayer/mplayer.conf
from
 vo=cvidix,vesa
to
 vo=vesa
== NVIDIA: screen sometimes suddenly turns black while watching a movie (sound continues) ==
try to turn off "PM Control by APM" in the BIOS.
== NVIDIA: Enabling vidix on i386 platforms==
Vidix is feature that provides accelerated video playback, color conversion and scaling specifically. It can provide a great boost in video performance, reducing dropped video frames, without any loss in video quality.
Unfortunately vidix support for Nvidias is experimental at the moment. However, I have found that certain cards do work just fine, albeit with some work. In the following paragraphs, some methods will be described that may allow you to enable vidix and check whether it works on your platform. You'll need to download:
* The [http://www.geexbox.org/en/downloads.html Geexbox ISO Generator]
* A tool to extract .tar.gz files (like [http://www.7-zip.org 7zip])
* If you are on Windows, an editor that can process Unix-format text files (see [[Translating]])
Get the generator, then extract it somewhere. You are now ready to check if vidix plays properly on your platform.
=== The Simple Way ===
Go to the directory iso/GEEXBOX/etc/mplayer and then delete the file ''no_nvidia_vidix''. Use the generator to produce a new iso image, burn it to a cd and boot with it in '''debug''' mode. Execute the following commands:
 sed 's/format=yuy2//g' /etc/mplayer/mplayer.conf > ~/temp
 mv ~/temp /etc/mplayer/mplayer.conf
 exit
Then check if everything seems fine (ie you can see the initial video menu, you can play videos and they are not distorted in some manner). If you do obtain an image and everything plays normally you're set, vidix is operating properly on your platform, but you do have to follow the step in ''Making the change persist'' as described below. If not, read onwards to ''The Alternative Way''.
==== Making the change persist ====
Open file ''iso/GEEXBOX/etc/init.d/74-mp_video'' with an editor that understands unix-format text files. Then change the following lines of code:
    # except if we want to try nvidia vidix
    if [ "$i" = '0300: 10de:' -a ! -f /etc/mplayer/no_nvidia_vidix ]; then
      mp_set_option vf "format=yuy2" concat
    # nvidia card on powerpc
    elif [ "$i" = '0300: 10de:' -a "`cat /etc/arch`" = ppc ]; then
to
    # except if we want to try nvidia vidix
    #if [ "$i" = '0300: 10de:' -a ! -f /etc/mplayer/no_nvidia_vidix ]; then
    #  mp_set_option vf "format=yuy2" concat
    # nvidia card on powerpc
    if [ "$i" = '0300: 10de:' -a "`cat /etc/arch`" = ppc ]; then
Save the file, make a new iso with the generator and you're set :)
=== The Alternative Way ===
If the paragraph's title scares you, don't! It's not that difficult actually. Assuming that you have deleted the no_nvidia_vidix file, as described in the previous paragraph, use an editor that understands unix-format text files to edit file ''iso/GEEXBOX/etc/mplayer/mplayer.conf''. Change the line that reads:
 vo=cvidix,vesa
...to:
 vo=vesa:vidix
Save the file, create a new ISO image and boot with it in ''debug'' mode. Execute the following commands:
 sed 's/format=yuy2//g' /etc/mplayer/mplayer.conf > ~/temp
 mv ~/temp /etc/mplayer/mplayer.conf
 exit
Then check if everything seems fine (ie you can see the initial video menu, you can play videos and they are not distorted in some manner). If you're ok, follow the instructions in ''Making the change persist''. If you still have problems, then unfortunately you can't do anything else...
=== A 'working' nvidia card list and how to help ===
Did you have success with the previous paragraphs to enable vidix? Or didn't you? In any case, '''your''' help will be appreciated: there is [http://www.geexbox.org/forum/viewtopic.php?t=6985 this thread] that contains information for certain nvidia cards which work (or don't work) correctly with vidix. Help us update it; it will be a useful resource for the next user who would like to know whether vidix works or not...
What to report in this thread? Easy! By now you must have already tried both approaches listed above, so you know what works and what doesn't. Two more things are needed:
* The model of your nvidia graphics card and
* Its PCI id. This can obtained by pressing F1 during boot, selecting ''debug'' and then entering the following command in the ''#'' prompt that will eventually appear:
 grep '0300: 10de:' /tmp/pci
Write down the output of this command. Then make a post in the thread with the following info:
* your card model
* the output of the previous command
* whether vidix worked, following the instructions in ''The Simple Way''
* whether vidix worked, following the instructions in ''The Alternative Way''
Even if nothing of the above helped, your information will be appreciated.
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