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Bug 1295061 - Primary monitor not detected correctly with DVI-I and DVI-D ports
Primary monitor not detected correctly with DVI-I and DVI-D ports
Status: NEW
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: mutter (Show other bugs)
All Linux
medium Severity medium
: rc
: ---
Assigned To: Florian Müllner
Desktop QE
Depends On:
Blocks: 1420851
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Reported: 2016-01-01 09:48 EST by Ashish Shah
Modified: 2017-07-27 13:54 EDT (History)
6 users (show)

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Description Ashish Shah 2016-01-01 09:48:55 EST
Description of problem:

Dual head configuration with spanning desktop across two monitors does not detect primary monitor correctly in GDM/GNOME
DVI-I is detected as primary monitor during boot-up and upon login to KDE session.
GDM login screen and GNOME session detects monitor on DVI-D as primary.
GNOME is not detecting primary monitor correctly with DVI-I and DVI-D ports.
Looks like GDM follows the alphabetic order DVI-D as primary in RHEL 7.2 ?
But KDE does select the power-on monitor as primary.

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

GNOME 3.14

How reproducible:

Always (with specific hardware)

Steps to Reproduce:
1. Boot up system in GUI mode with dual monitor.
2. On GDM screen login as user to KDE session.

Actual results:

Monitor on DVI-I is detected as primary during boot-up and in KDE session
GDM and GNOME detect DVI-D monitor as primary

Expected results:

GDM/GNOME should also detect monitor on DVI-I as primary

Additional info:

This was working well with RHEL7.1 and earlier, even with RHEL6.
Problem is specific to RHEL7.2
Problem is also specific to dual head setup with DVI-I and DVI-D ports
Configuring monitors.xml to use desired monitor as primary helps to workaround the issue.

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