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I'm running an HTPC (xbmc) without a keyboard/mouse attached, running oneiric. After some indeterminate amount of time, sometime between 1 and 12 hours, the display goes to sleep. The computer itself is not sleeping, I can still SSH to it from another computer. The remote will not wake the display. The IR receiver is working, as irw will show me the remote key presses. The only way to get my display back is to restart the display manager, lightdm in this case.

Does anybody know a way to keep the display from going to sleep? I don't really need any power management at all considering that it connects to my TV and when I want my display to go to sleep, I turn off my TV.

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It MIGHT be screensaver related. If you run XBMC from Gnome (or similar), you can try (for 11.10):

gconftool-2 -s /apps/gnome-screensaver/idle_activation_enabled --type=bool false

Or for 12.04:

gsettings set org.gnome.desktop.screensaver idle-activation-enabled false

If you are running XBMC in its own session (you log in to xbmc from lightdm) you might be experiencing the same problem as me: How do I disable the screen saver in 12.04 system wide?

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Yeah, lightdm launches it directly. I've tried all of these solutions before though, so I'm back to the drawing board. Thanks anyway. – Eugene May 11 '12 at 17:35

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