Bug 1302941 - gdm3 ignores system xorg.conf generated by nvidia-settings and mangles the display layout
Summary: gdm3 ignores system xorg.conf generated by nvidia-settings and mangles the di...
Keywords:
Status: CLOSED DUPLICATE of bug 1290448
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: mutter
Version: 7.1
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: rc
: ---
Assignee: Florian Müllner
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-01-29 04:53 UTC by Derek Schrock
Modified: 2016-05-24 09:54 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-05-24 09:54:56 UTC
Target Upstream Version:

Attachments (Terms of Use)
/etc/X11/xorg.conf generated by nvidia-settings using a BaseMosic 3x2 layout for 2 NVS 510s (2.53 KB, text/plain)
2016-01-29 04:53 UTC, Derek Schrock 		no flags Details
/var/log/Xorg.0.log (44.11 KB, text/plain)
2016-01-29 04:54 UTC, Derek Schrock 		no flags Details
/var/log/gdm/:0.log (33.34 KB, text/plain)
2016-01-29 04:54 UTC, Derek Schrock 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Description Derek Schrock 2016-01-29 04:53:57 UTC 
Created attachment 1119340 [details]
/etc/X11/xorg.conf generated by nvidia-settings using a BaseMosic 3x2 layout for 2 NVS 510s

Description of problem:

On RHEL 7.1 once gdm starts gdm ignores system xorg.conf generated by nvidia-settings and mangles the display layout.  

The attached xorg.conf was generated by nvidia-settings using BaseMosaic to for 2 nvidia NVS 510s creates a single X server that spans across mutliple GPUs in a 3x2 layout (7680x2160).

gdm reconfigures the display layout (show in Xorg.0.log and :0.log) to a single row of 6 displays (6x1 at 15360x1080).

Using startx from a multi-user.target or a different desktop manager (xdm or lightdm) does not reconfigure the layout 

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

RHEL 7.1 gdm-3.8.4-32

How reproducible:
Always

Step to j
Using the attached xorg.conf with supported nvidia GPUs enable gdm and start the graphical.target  

Actual results:
Once gdm starts, the displays are not in the expected 3x2 layout configured in /etc/X11/xorg.conf.  gdm reconfigures the layout to be a single row of displays.

Expected results:

gdm to use the /etc/X11/xorg.conf BaseMosaic 3x2 metamodes.
Comment 1 Derek Schrock 2016-01-29 04:54:19 UTC 
Created attachment 1119341 [details]
/var/log/Xorg.0.log
Comment 2 Derek Schrock 2016-01-29 04:54:45 UTC 
Created attachment 1119342 [details]
/var/log/gdm/:0.log
Comment 4 Derek Schrock 2016-02-16 14:30:31 UTC 
Is this a dup of bug 1290448?
Comment 5 Bastien Nocera 2016-05-24 09:54:56 UTC 
(In reply to Derek Schrock from comment #4)
> Is this a dup of bug 1290448?

Yes, thanks.

*** This bug has been marked as a duplicate of bug 1290448 ***
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