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Check that the sound is not muted, that cables are plugged in properly, and that the sound card is detected.
Shantha kumar,
shkumar@redhat.com 2013

# I cannot hear any sounds on the computer

If you cannot hear any sounds on your computer, for example when you try to play music, go through the following troubleshooting tips.

# ஒலி ஒலியடக்கப்படவில்லை என உறுதிப்படுத்திக் கொள்ளவும

Open the system menu and make sure that the sound is not muted or turned down.

Some laptops have mute switches or keys on their keyboards — try pressing that key to see if it unmutes the sound.

You should also check that you have not muted the application that you are using to play sound (for example, your music player or movie player). The application may have a mute or volume button in its main window, so check that.

Also, you can check the Applications tab in the Sound GUI:

செயல்பாடுகள் மேலோட்டத்தில் இருந்து அமைவுகள் ஐத் திறக்கவும்.

Click Sound.

Go to the Applications tab and check that your application is not muted.

# ஸ்பீக்கர்கள் இயக்கப்பட்டுள்ளதா என்றும் சரியாக இணைக்கப்பட்டுள்ளதா என்றும் பார்க்கவும்

உங்கள் கணினிக்கு வெளி ஸ்பீக்கர்கள் இருந்தால், அவை ஆன் செய்யப்பட்டுள்ளதா என்றும் ஒலியளவு அதிகமாக உள்ளதா என்றும் சோதிக்கவும். ஸ்பீக்கர் கேபிள் கணினியிலுள்ள "output" ஆடியோ சாக்கெட்டில் நன்கு செருகப்பட்டுள்ளதா என்றும் பார்க்கவும். வழக்கமாக இந்த சாக்கெட் வெளிர் பச்சை நிறத்தில் இருக்கும்.

Some sound cards can switch between the socket they use for output (to the speakers) and the socket for input (from a microphone, for instance). The output socket may be different when running Linux, Windows or Mac OS. Try connecting the speaker cable to a different audio socket on your computer.

A final thing to check is that the audio cable is securely plugged into the back of the speakers. Some speakers have more than one input, too.

# Check that the correct sound device is selected

Some computers have multiple "sound devices" installed. Some of these are capable of outputting sound and some are not, so you should check that you have the correct sound device selected. This might involve some trial-and-error to choose the right one.

Open the Activities overview and start typing Sound.

Click on Sound to open the panel.

In the Output tab, change the Profile settings for the selected device and play a sound to see if it works. You might need to go through the list and try each profile.

If that does not work, you might want to try doing the same for any other devices that are listed.

# சவுன்ட் கார்டு சரியாக கண்டறியப்படுகிறதா என சோதித்தல்

Your sound card may not have been detected properly probably because the drivers for the card are not installed. You may need to install the drivers for the card manually. How you do this depends on the type of the card.

Run the lspci command in the Terminal to find out what sound card you have:

செயல்பாடுகள் மேலோட்டத்திற்குச் சென்று ஒரு முனையத்தைத் திறக்கவும்.

Run lspci as superuser; either type sudo lspci and type your password, or type su, enter the root (administrative) password, then type lspci.

Check if an audio controller or audio device is listed: in such case you should see the make and model number of the sound card. Also, lspci -v shows a list with more detailed information.

You may be able to find and install drivers for your card. It is best to ask on support forums (or otherwise) for your Linux distribution for instructions.

If you cannot get drivers for your sound card, you might prefer to buy a new sound card. You can get sound cards that can be installed inside the computer and external USB sound cards.