iam facing one problem regarding sound ,sound is coming but whenever iam increasing or decreasing the volume ,sound sudennly stops.
Does anyone know the solution

You will need to give us more information than that. Kernel version? Sound card model? The sound chip it is using?

Do:

Hi
I gave these two commands which u have said
1:uname -a
Linux dhcppc0 2.6.18-8.el5xen #1 SMP Fri Jan 26 14:42:21 EST 2007 i686 i686 i386 GNU/Linux

2: lspci
00:00.0 Host bridge: Intel Corporation 82946GZ/PL/GL Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 82946GZ/PL/GL PCI Express Root Port (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82946GZ/GL Integrated Graphics Controller (rev 02)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5786 Gigabit Ethernet PCI Express (rev 02)

OK. Try run "alsaconf" and write down what is the device it detected, we may need this for further fine tuning the configuration.

From here, if it claim configured successfully, try run "alsamixer" to set the mixer level and make sure all is unmuted. Save your setting by running "alsactl store" after exit from the alsamixer.

If the problem continues, you will need to add additional configuration options for your card. But, we need the device name before we can do that.

I tried to run "alsaconf" but it did not worked
In alsa mixer everything is on

What do you mean it did not work? You mean, it cannot be detected? If so, your alsa mixer should not be working. No point playing with the mixer if your card is not detectable.

I meant when iam typing this cmd it shows

[root@dhcppc0 c_prog]# alsaconf
bash: alsaconf: command not found

Oh... This means your "ALSA" is either not properly installed or is not in the PATH. You should install all the packages for "ALSA", otherwise, you may have problem playing sounds in the system.

can u tell me how can i install all the packages
it will be a great help

I am using Slackware, for my case, I simply look for the alsa-xxx.tgz packages and use installpkg or upgradepkg on them.

I am not sure about other distributions. You may need to post your question for distribution specific forum.