Tried downgrading kernel of my MSI Wind U100 from linux-image-2.6.32-5-686_2.6.32-30_i386 to linux-image-2.6.32-5-686_2.6.32-29_i386 (from -30 to -29) and this seems to make resume from hibernate work reliably. Got the older kernel from http://snapshot.debian.org/archive/debian/20110115T030118Z/pool/main/l/linux-2.6/linux-image-2.6.32-5-686_2.6.32-29_i386.deb -- Paolo