Re-assigning to anaconda, since the description states the problem is with the guest OS, and the same host works fine with anaconda from F26/27 guest.

This is a follow up of the previous bug https://bugzilla.redhat.com/show_bug.cgi?id=1569045 where virt-install was called with text console and not vnc console.

Created attachment 1426733 [details]
all_tmp_logs.txt

anaconda hangs because X failed to start as detailed in attached all_tmp_logs.txt

===
[anaconda root@localhost /]# tail -f /tmp/anaconda.log
15:01:00,949 INF threading: Thread Done: AnaWaitForConnectingNMThread (140735373832576)
15:01:01,432 WRN display: X startup failed: Xorg exited with status 1
15:01:01,439 WRN stdout: X startup failed, falling back to text mode
15:01:01,440 DBG anaconda: changing display mode from GUI to TUI
15:01:03,457 DBG simpleline: Scheduling screen AskVNCSpoke
15:01:03,458 DBG simpleline: New signal RenderScreenSignal enqueued with source ScreenScheduler
15:01:03,459 DBG simpleline: Starting main loop
15:01:03,459 DBG simpleline: Processing signal RenderScreenSignal
15:01:03,460 DBG simpleline: Processing screen ScreenData(AskVNCSpoke,None,False)
15:01:03,473 DBG simpleline: Input is required by ScreenData(AskVNCSpoke,None,False) screen
===
=== tail of /tmp/X.log
===
[   167.245] (EE) Device(s) detected, but none match those in the config file.
[   167.245] (EE) 
Fatal server error:
[   167.245] (EE) no screens found(EE) 
[   167.245] (EE) 
Please consult the Fedora Project support 
         at http://wiki.x.org
 for help. 
[   167.245] (EE) Please also check the log file at "/tmp/X.log" for additional information.
[   167.245] (EE) 
[   167.245] (EE) Server terminated with error (1). Closing log file.
===

If  I compare the X*.log between f27 and f28, this may points to missing "/dev/dri/card0" for f28. What is the cause ?
===
$grep -i dev.dri Xf28.log Xf27.log 
Xf28.log:[   167.235] (EE) open /dev/dri/card0: No such file or directory
Xf28.log:[   167.235] (EE) open /dev/dri/card0: No such file or directory
Xf27.log:[   137.456] (II) xfree86: Adding drm device (/dev/dri/card0)
Xf27.log:[   137.504] (II) modeset(0): using drv /dev/dri/card0
===

I guess the previous X.log failure is related tot the bosh_drm failure reported in syslog; BUT I do not know how to continue the investigation.
Dan do you have a suggestion ?

=== extract all_tmp_logs.txt:
15:00:36,276 INFO kernel:fb: switching to bochsdrmfb from OFfb vga
15:00:36,276 INFO kernel:Console: switching to colour dummy device 80x25
15:00:36,276 WARNING kernel:bochs-drm 0000:00:07.0: BAR 0: can't reserve [mem 0x200081000000-0x200081ffffff pref]
15:00:36,277 ERR kernel:[drm:bochs_hw_init [bochs_drm]] *ERROR* Cannot request framebuffer
15:00:36,277 WARNING kernel:Trying to free nonexistent resource <0000200081000000-0000200081ffffff>
15:00:36,277 WARNING kernel:bochs-drm: probe of 0000:00:07.0 failed with error -16
===

at least a bypass would be to add "plymouth.enable=0" as virt-install --extra-args as suggested by https://lists.opensuse.org/opensuse-bugs/2016-05/msg02027.html

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I just verified that no more problem with f29 release.