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The sounds stops immediately if I unplug the laptop charger and nothing will make it produce sound again even with my own sound devices connected to the laptop! I'm using Ubuntu 12.04 LTS on a G570 Lenovo.

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also,happens frequently, all videos and Flv's on the internet (like youtube and others) get really fast that I can't watch or even listen to anything ! – mahmoud Sep 16 '12 at 14:59
Please edit this comment into your question. – user76204 Sep 16 '12 at 15:10
what does lspci -vvv, or lshw output? Mine works. Look in BIOS settings, as it can have crazy power save settings. – Wilf Oct 29 '13 at 18:34

Maybe it's a drivers' problem, so be sure of install them. If you didn't install any drivers/your soundcard's drivers yet, you can follow the next steps:

  • Click on the Dash
  • Search for Additional and click Additional Drivers
  • Wait a bit, and you'll see a list with all the compatible drivers for your computer. You can install your graphics card drivers (I usually install the post-release drivers) and all your other devices.
  • Check if your soundcard name appears at that list, select the entry for it and click Activate. After a while, you'll have to restart your computer.

After restarting, it should be working OK if it was a driver-related problem. I hope it works to you and tell us soon!

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