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I'm using an fresh install of Ubuntu 12.04 and I'm having some problems with HDMI. I usually use it with my TV, but since the update isn't working any more.

Sometimes in 11.10 I had to execute a script to get the video and sound to work in HDMI, but it was OK. Since the update, when I connect the HDMI cable, it works, but if I make any change in the display settings (like resolution, monitor position, etc,) it freezes.

And if I don't change anything, it's working in both monitors, but when I remove the cable, it freezes and even the ctrl+alt+f2 shortcut works.

Any ideas for fixing this? I Googled and only found many people having problems, usually with sound.

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Trying to fix and I discovered something: When the "display monitor" window is on the laptop screen (screen 1), it works, but if it's on the secondary monitor, it freeze everything. –  euDennis May 2 '12 at 17:19
    
possible duplicate of What should I do when Ubuntu freezes? –  Jorge Castro Aug 8 '12 at 2:56
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