the problem is, that the ubuntu 15.04 64bit as well as the 14.04 64bit live usb I created freezes at random points during the installation as well as when I use it as a live cd. I verified the usb via md5, tried different usb sticks and four different ways of creating it (ubuntu, ubuntu unetbootin, mac dd, mac unetbootin) and still it freezes.
I have a pretty new setup: - i7-3930K, - 16 gb ram, - MSI R7 260X - Samsung MZ-7TE250KW 250GB ssd
I also tried setting nomodeset, but to no avail. Since it freezes, I was not able to get a proper error reading :-/.
The 32bit version seems to work fine, but it is a 32bit version after all...
I hope you can help me, thanks in advance!