suspend to ram - wake up via usb fails

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https://bbs.archlinux.org – Hello,I own a Dell Vostro 1310.Suspend systemctl suspend and hibernate systemctl hibernate works without any problems, also resuming from these.But when I suspend my system to RAM I can wake up only via power button - wake up via USB fails.In BIOS I enabled 'USB wake support (only AC mode)'.http://ompldr.org/vZ2thaQ/bios.jpgI also tried using another keyboard (the one of my brother), but it fails.If I boot Windows 7, the system is able to wake up via USB.If I plug my keyboard into my brother's desktop PC (Xubuntu 10.04) and suspend, I can wake up with my keyboard.When I plug my (HowTos)