- Ghost Unknown
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- Exalted Legendary Member
Type 'hud_enable_motion_sensor 0' into the console if you want to turn it off. I'm not quite sure what's causing it to fail, but try 'hud_blink_motion_sensor 1' to see if it works at all.
If it still doesn't work, try fiddling with the graphics settings such as decals and particle settings until you find something that might work. If all else fails, reinstall.