Can't boot the system after an update

[German G]

Hello list. After doing an update I can't boot into the system. It hangs
right at the logo screen. I tried to run boot-repair disk
to no avail. The system is still unusable. Please advice on what can I do
to resolve this issue. Thanks.

Boot-repait log is available here:

http://paste.ubuntu.com/6893643
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