[all variants] sleep/suspend workes once - after that immediate wakeup

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http://ubuntuforums.org – I have a new install of 64-bit karmic (Gnome and KDE), dualbooting with XP on a desktop with the ASUS M3N78-EM Mobo. My problem, is that I can suspend to RAM only once. The first time everything works just fine, the computer suspends, and starts nicely from the power button. But if I try to suspend a second time (without a reboot or hibernate in between), the computer first seems to suspend, but then immediately wakes itself up again. After this I can continue to work normally, but suspend continues to wake itself up, whenever I try it. my /proc/acpi/wakeup shows everything as disabled (no poweron in there). Here is my pm-suspend.log with an immediate awake, in case it's of any help. Attached Files pm-suspend.log.doc (5.7 KB) (Hardware)