Bug 1380762

Summary: Test case failure: Console - Change Screen on [AMD/ATI] Kaveri [Radeon R7 Graphics] [1002:130c]
Product: Red Hat Enterprise Linux 7 Reporter: Vasiliy Sharapov <vsharapo>
Component: xorg-x11-drv-atiAssignee: Lyude <lyude>
Status: CLOSED INSUFFICIENT_DATA QA Contact: Desktop QE <desktop-qa-list>
Severity: low Docs Contact:
Priority: low    
Version: 7.5CC: lyude, tpelka, vsharapo
Target Milestone: rc   
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Hardware: x86_64   
OS: Linux   
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Last Closed: 2017-10-12 16:13:28 UTC Type: Bug
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Description Vasiliy Sharapov 2016-09-30 13:59:53 UTC 
Filed from caserun (https://tcms.engineering.redhat.com/run/294277/#caserun_13783570)

Version-Release number of selected component (if applicable):
RHEL-7.3-20160914.1
xorg-x11-server-Xorg-1.17.2-22.el7.x86_64
xorg-x11-drv-ati-7.6.1-3.20160215gitd41fccc.el7.x86_64
kernel-3.10.0-506.el7.x86_64
linux-firmware-20160830-49.git7534e19.el7.noarch
package mesa is not installed
mesa-dri-drivers-11.2.2-2.20160614.el7.x86_64
package xorg-x11-glamor is not installed

Steps to Reproduce: 
 1. obtain two screens with different resolution
 2. boot to runlevel 3


 1. after you log in disconnect first monitor and connect the other one
 2. check resolution via monitor menu or fbset (from epel or fedora repo)



Actual results: 
Switching from 1920x1080 to 1920x1200 I get a resolution of 1400x1050 on the 1900x1200 monitor

Expected results:
correct resolution should be set
Comment 2 Lyude 2017-07-27 20:27:52 UTC 
I think I know exactly what this issue is, it's probably not actually a bug. Basically, in order to make sure that the console can get displayed on both monitors fbcon does the very easy method of choosing a single resolution that both monitors can support. If they're different resolutions, then one of the monitors is always going to be at a lower resolution then the other. Additionally, in your case it's very possible that one of those monitors doesn't support 1080p and thus it goes to a lower resolution for both displays.

Mind showing me the full list of supported modes from both monitors? I should be able to tell pretty easily if this is the case.