black screen after boot

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http://crunchbanglinux.org – Hello dear Community,until recently I've been running CB Statler r20110207 on my lil Acer Netbook. I found that release a lot more stable on my Netbook than the R20111125 release (haven't tried the latest from 8th of feb). So a week ago, I made a apt-get update && upgrade . Ever since then, my netbook won't boot properly, I get a black screen instead of the login screen. The netbook is completely unresponsive, I can only do a hard reboot. Recovery mode works tho (and gives me root shell w/o asking for a pw, strange?)Since I'm still a newb relating to unix in general (HowTos)