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I was almost through and downloading the packages and then the system froze up.

Upon reboot the message was "gnome-power-manager has configuration defaults not installed properly". How do I get my system back? I have only a blank screen with that message.

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can you boot into recovery mode? i.e. when you get to the grub screen where you select which kernel, can you select the one which ends in recovery mode? –  Slipstream Apr 26 '11 at 8:39
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1 Answer 1

Try issuing sudo dpkg --configure -a from a shell prompt.

If you can't boot normally, try selecting a recovery or earlier kernel from the grub screen as @Slipstream suggests, then opening a shell.

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