Since ajax set X to start by default spanning monitors it seems firstboot is confused, not sure exactly why. I appeared to get a window with the button offscreen somewhere, however X then crashed when I vt switched (different bug, fixed in rawhide) so I didn't get much further. We probably need to investigate this before beta or final.
Okay some more info the app appears to be confused with xinerama geometries or something, it starts on the right hand screen, but looks to be sized for the left or something like that.
*** Bug 529045 has been marked as a duplicate of this bug. ***
see my duplicate for a more extensive evaluation. -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
this Koji build with the elsewhere-discussed 'ui fixes': http://koji.fedoraproject.org/koji/buildinfo?buildID=136672 makes it usable in my problematic case. I have asked Robert Day to see if it does anything about his. Dave, does it sort out yours too? -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
jesse wants to add this post-beta rather than try to cram it into the beta, so dropping the beta blocker designation. will document on Common Bugs. -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
oh, forgot to mention - Robert Day reported the updated firstboot fixes his instance of the bug too, which is great, more than I expected in fact. can we file a request to have this tagged into f12 final (not beta)? common bugs: https://fedoraproject.org/wiki/Common_F12_bugs#firstboot-multihead -- Fedora Bugzappers volunteer triage team https://fedoraproject.org/wiki/BugZappers
I can think of another problematic case for spanned firstboot. On RV730 and RV740 GPUs (Radeon 46xx and 47xx) and maybe some other, default order of displays is swapped on opensource ATI drivers compared to ATI Catalyst. To explain it a bit better, consider this: if you connect left monitor to lower port, and right monitor to upper port on card, and install ATI Catalyst under Windows, you will get (by default) right order of displays. However, when using opensource (either radeon or radeonhd) drivers, it will be swapped. That means firstboot will look a bit weird, even if it's fully functional. I'm not sure if there is a bug about it (on xorg-video-ati or xorg-video-radeonhd); I never considered reporting it because it is so easy to reconfigure, but since user can't configure displays before firstboot appears, it will indeed look a bit weird.
The build is tagged for final.