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For some unknown reason, every time after I run the game "Rochard" via Steam, I will not be able to shutdown afterwards. My desktop will restart itself after shutdown and I need to force it by pressing the power button.

The effect carries on unless I let my computer to power off for some period of time.

I'm very new to linux so I'm not too sure where to begin the debug.

Up to now, I've tried the laptop-mode and editing grub (adding acpi=noirq) but neither works.

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Have you tried sudo shutdown -h now from the command line? –  Marc Sep 24 '13 at 3:29
Yes I did.... Update: Running any games from steam cause this effect.... previously it didn't happen. My system: Ubuntu 13.04, PcPartPicker –  nschong Sep 26 '13 at 22:54

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