Solutions to Common Problems

Listed here are answers to some commonly asked questions and solutions to common problems related to multimedia hardware and software:

Why doesn't my distribution include an MP3 encoder or DVD player?

Due to legal issues related to patents, many Linux distributions do not ship an MP3 encoder or DVD player application. You may be able to download these separately after determining for yourself that they can be used legally in your jurisdication.

Are there free alternatives to MP3 and DVD that are not encumbered by patents?

The Ogg project by the Xiph.org Foundation has developed several encoding formats and free implementations that are free of patent issues including Ogg Vorbis for audio and Ogg Theoris for video. See http://www.xiph.org for more information.

Kernel modules not loaded

This could be caused by incorrect module configuration files. It will also occur if the kernel module loader (kerneld or kmod) is not running. Make sure the module is available for loading in the appropriate directory (typically something like /lib/modules/2.4.17/kernel/drivers/sound).

Sound card not detected

You are probably using the wrong kernel driver or the wrong settings for I/O address, IRQ, or DMA channel.

IRQ/DMA timeout or device conflicts

You are using the wrong settings for I/O address, IRQ, and DMA, or you have a conflict with another card that is using the same settings.

No sound after rebooting

If sound was working and then stopped when the system was rebooted, you probably ...

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