Let me ask this, as language may be a problem: "Reistalling OS is not a decision - problem remained" by this you mean, it did not solve the problem, right? But, if you reflash and test before installing kernel-power, CSSU or ANYTHING else, does the device behave properly? In other words, the problems you have, including that with blessn900) are definitely related to k-p52 and CSSU. This is not clear from what you have written.