IBM is upset with ASUS, enough to announce just how upset they are. Claiming that ASUSTeK has committed patent violations, IBM has filed a complaint against them with the ITC. IBM's assertion is that three patents have been violated, including one for power supplies, another for controlling the speed of a fan and a third for "making a cluster of computers appear as a single host on a network".
They claim that many ASUS products use IBM technology, from notebooks to servers to OEM components. You can read about the complaint at IBM's site. The ITC has no comment about the situation, but IBM claims they have tried to work with ASUSTeK to no avail. There isn't any mention of a monetary compensation, so it may be that IBM is trying to get the ITC to bar imports from ASUSTeK.