Created attachment 971309 [details]
journactl log for basic graphical boot (success)

Description of problem:

Fedora 21 fails to boot into graphical mode on MacBook Pro (2008 model 4,1). It's possible to boot using basic graphical mode though, or to boot using a workaround described in

https://bugzilla.redhat.com/show_bug.cgi?id=1161887

i.e. logging as a root and

echo 1 > one
mount -o bind one /sys/class/drm/card0/device/boot_vga
startx

which also indicates the bug is carried from F20 version. I believe this also indicates the bug is on kernel side.

Version-Release number of selected component (if applicable):
3.17.4 kernel (comes with Fedora 21 live media)

How reproducible:
always

Steps to Reproduce:
1. create a bootable USB stick with live Fedora 21 version
2. boot from USB (hold option key while booting, then select Fedora media)

Actual results:
system stops, but it's possible to log in as a root and start X using above-mentioned workaround

Expected results:
KDE/Gnome etc. X11-based environment starts

Additional info:
For the successful boot into basic graphic mode I attach
  * journarctl.log_basic - journalctl log
  * lsmod_basic.log - lsmod result
  * Xorg.0.log_basic - Xorg log
For the unsuccessful boot into normal mode followed by startx I attach
  * journarctl.log_fail
  * lsmod_fail
  * Xorg.0.log_fail