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I don't know why but my laptop screen (Lenovo Thinkpad SL300) suddenly turns black after turning down the volume and then comes back, with ugly problems, after turn it up. It started happening after doing some changes on Compiz.

Can you help?

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Please try unity --reset in terminal – Tachyons Oct 10 '12 at 11:13
solved: "jupiter" was the problem. at least i uninstalled it and no more black screen with the volume button after. thanks a lot – garrido Oct 12 '12 at 23:19

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