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Description of problem:

We've noticed that in RHEL 7.4, when a machine is booted without a monitor connected (as nearly all of our workstations do), the gdm/X screen remains deactivated when a monitor is connected. X sees that the monitor has connected, and it's listed in xrandr's output, but in the past the monitor mode would get activated automatically.

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

mutter-3.22.3-11.el7.x86_64

How reproducible:

100%

Steps to Reproduce:
1. Boot system without monitor
2. Attach monitor

Actual results:

The monitor isn't activated

Expected results:

For the monitor to be correctly recognized and activated.

i think the patch on bug 1618632 should fix this, moving to POST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2018:3140