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Not quite sure, what could help. XDA's thread (for the Galaxy S2) is full of posts and there's only little real information. Maybe follow some suggestions mentioned here (and in the linked thread): xda-developers.com/android/…
AFAIK the l2_hsic wakelock is connected to "Fast Dormancy". Might be your modem has some trouble with it, as described in some XDA threads (e.g. here). Also see: kernel - l2_hsic prevents my device from Deep Sleep. How to fix it. Both links are about a Galaxy Note, but the underlying issue might be similar.
l2_hsic
wakelock is connected to "Fast Dormancy". Might be your modem has some trouble with it, as described in some XDA threads (e.g. here). Also see: kernel - l2_hsic prevents my device from Deep Sleep. How to fix it. Both links are about a Galaxy Note, but the underlying issue might be similar.