Bug 1023801

Summary: GDM does not show after logout with second screen connected
Product: [Fedora] Fedora Reporter: Michael Monreal <michael.monreal>
Component: gdmAssignee: Ray Strode [halfline] <rstrode>
Status: CLOSED EOL QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: 20CC: rstrode
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Hardware: x86_64   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2015-06-29 12:44:26 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Michael Monreal 2013-10-27 21:57:44 UTC
Description of problem: After logout from GNOME-Shell, the GDM screen does not display if a second screen is connected.

Version-Release number of selected component (if applicable):
gdm-3.10.0-1.fc20.x86_64 (regression from fc19!)

How reproducible:
My setup consists of a laptop (primary screen) and a 24" external/secondary screen.

Steps to Reproduce:
1. logout using the GNOME 3 menu

Actual results:
The primary screen turns black, the secondary turns gray (this seems to be the structured gray GDM/lockscreen background).

Expected results:
The login screen should be displayed.

Additional info:
If I disable the second screen in GNOME I get the same result.

If I CTRL-ALT-F2 to a TTY and then press ALT-F1 the login screen is displayed (and works) correctly.

If I physically disconnect the second screen before logout, everything works fine!

Comment 1 Michael Monreal 2013-10-27 22:18:21 UTC
I just tried to log in "blind" and it worked... so GDM is actually running but it is "hidden" behind a black screen.

I am using the Intel drivers (Ivy Bridge system) and did not notice a similar corruption in other places of the desktop.

Comment 2 Michael Monreal 2013-12-01 18:33:57 UTC
Just a quick update: this is still the case with all updates as of today.

Comment 3 Michael Monreal 2014-03-31 17:24:40 UTC
Another update: I finally noticed that the screen actually _does_turn on, the problem is that it is set to 0% brigtness. From a certain angle you can still make out some things and if you are lucky enough you can even set the brighness to a higher level.

This is also discussed in bug #1050136

Comment 4 Fedora End Of Life 2015-05-29 09:38:36 UTC
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Comment 5 Fedora End Of Life 2015-06-29 12:44:26 UTC
Fedora 20 changed to end-of-life (EOL) status on 2015-06-23. Fedora 20 is
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