From LinuxTag Public Wiki
As explained in the Call for Papers, LinuxTag has a small budget to be used as travel grants. We expect you to cover your travel expenses yourself.
The travel grants are only used as a hardship fund. We suggest you ask you employer or some other sponsor to cover your travel expenses. If that is not an option for you, please send us an email with your itinerary and the approximate expenses to mailto:email@example.com. To make this a fair process and to be able to provide everyone requiring a travel grant please contact us by April, 3rd 2013, 15:00 (GMT) if you depend on that. Our conference team will review all travel grant applications and get back to you within a week after this deadline.