Bug 1631880

Summary: Xorg defaults to clone mode if the monitor cable/connector can't handle the preferred mode
Product: Red Hat Enterprise Linux 7 Reporter: Ray Strode [halfline] <rstrode>
Component: xorg-x11-serverAssignee: Adam Jackson <ajax>
Status: CLOSED ERRATA QA Contact: Desktop QE <desktop-qa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.6CC: lmiksik, tpelka
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Fixed In Version: xorg-x11-server-1.20.1-3.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-10-30 08:03:01 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Description Flags
try harder to span instead of clone none

Description Ray Strode [halfline] 2018-09-21 19:29:53 UTC
Created attachment 1485774 [details]
try harder to span instead of clone

I have a 4k monitor that only likes to do 1080p over the HDMI cable.  In this scenario Xorg picks clone mode instead of the much more useful spanning mode.

The attached patch makes it come up in a spanned configuration.

Comment 1 Adam Jackson 2018-09-21 20:46:20 UTC
Looks sane to me.

Comment 3 Tomas Pelka 2018-09-25 09:37:59 UTC
Seems to be ok, was not able to reproduce on fixed rpm.

Comment 5 errata-xmlrpc 2018-10-30 08:03:01 UTC
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.