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One of my friends, when trying to make an USB speaker work in ubuntu 11.10+gnome 3.2+no graphics card HP machine, accidentally removed the pulseaudio driver as well as the graphics driver. So after the boot, it gives a blank screen. I tried to remove and install xorg, but it did not help. Can anyone help please?

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We need more hardware information to help you, can you look at this question and then edit your question adding the information. – bodhi.zazen Apr 2 '12 at 17:37
up vote 1 down vote accepted

This is a generalist way of doing things because you neglected to include hardware information, so this is a catch-all answer.

Sound Troubleshooting

ATI Driver info

Nvidia Driver info

User Documentation

You will almost certainly need to boot to recovery mode to install the drivers. To be honest, it may be easier to back up your data and do a fresh install.

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