Created attachment 897257 [details]
boot.log

Description of problem:
On my Fedora 20, up-to-date to the latest packages, I have an external monitor set as primary, with the built-in monitor from my Lenovo T530 as secondary. Since one of the last updates, when I reboot/boot the machine, the built-in display is blank. After logging in, I can adjust the display settings on Gnome, changing the resolution for the built-in display to some smaller resolution, apply the changes, then going back to the previous resolution, and apply again, and the built-in display is back to life. 

Version-Release number of selected component (if applicable):


How reproducible:
Always, upon reboot/cold boot.

Steps to Reproduce:
1. On a setup as described, reboot


Actual results:
The built-in display, marked as secondary on Gnome display settings, is blank.

Expected results:
The login screen should be displayed.

Additional info:
It seems that somehow the display is recognized, as if it weren't, then the login screen would be visible on the external monitor (primary). If I hit "Enter" and type in my password, I can login just fine, but the screen just happens to be "blank". 

I'm attaching:
- the yum.log, to show which packages were last updated (I have no idea if I correctly selected the component), 
- two Xorg.0.log files, the first being the one collected right after boot, the second after the exercise of changing the resolution of the built-in display (secondary), which results in the screen being back to life
- dmesg, which might provide some help about my machine
- boot.log, although I'm not sure if it's helpful at all.