https://bugs.freedesktop.org/show_bug.cgi?id=83792
--- Comment #3 from Christian König deathsimple@vodafone.de --- Well the nomodeset option only makes sense with the UMS support and that was deprecated in January 2013.
So as long as Fedora 20 doesn't compile their kernels with a deprecated feature they probably won't support nomodeset any more.
Without any logs it would be rather hard to figure out what's going wrong here.
So is there a possibility to attach for example a serial or network console to grab the last few lines of system log before the machine goes into nirvana?