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I'm running Ubuntu 11.10, and it appears the suspend feature suddenly stopped working. Now, when I close the laptop lid, the machines powers off. To my knowledge, I haven't made any configuration changes to suspend when laptop lid is closed. It was working perfectly yesterday. What can I do to diagnose and hopefully fix this issue?

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Can you please get the output of gsettings list-recursively org.gnome.settings-daemon.plugins.power and add it to your question? – Bruno Pereira Jan 5 '12 at 15:19

Adding GRUB_CMDLINE_LINUX="acpi_sleep=nonvs" to /etc/default/grub and then running sudo update-grub seemed to fix the problem.

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If that didn't work for you, please refer to the last comment I made on this post for help:

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