Bug 1381429

Summary:	Test case failure: Multihead - Mirror Screens of Different Resolutions on Dell Precision 7710 - Amethyst XT [Radeon R9 M295X] [1002:6921]
Product:	Red Hat Enterprise Linux 7	Reporter:	Vasiliy Sharapov <vsharapo>
Component:	xorg-x11-drv-ati	Assignee:	Lyude <lyude>
Status:	CLOSED WONTFIX	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.5	CC:	kasmith, lyude, mboisver, tpelka
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-12-15 07:46:47 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 Vasiliy Sharapov 2016-10-04 05:30:46 UTC

Filed from caserun (https://tcms.engineering.redhat.com/run/289603/#caserun_13279412)

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. Connect two screens with different native resolutions to you box


 1. Check Plymouth
 2. Check GDM
 3. Check KDE/GNOME Session (you need to set it via system settings and display
    there)



Actual results: 
If you set the display to Mirror, then revert, and repeat a few times (usually 1-2 interations) the displays stop working. On my setup, with all 3 displays in use, the integrated display stops first, and after a few tries the HDMI display stops working. Running `xrnadr` shows them as normal, modes set, but the target display gets no signal and goes to sleep.

Expected results:
both screens should be set to some resolution that should fit to both of them

 

Example:

Screen 1: 1024x 768

Screen 2: 1280 x 600

 

both should be set to 1024x600

Comment 2 Lyude 2017-07-27 20:40:18 UTC

The 7710 is made of pure evil and cannot be trusted. Please check https://bugzilla.redhat.com/show_bug.cgi?id=1381286#c2 and do that first before I look into this.

Comment 3 Vasiliy Sharapov 2017-08-08 07:13:13 UTC

More interesting in:
RHEL-7.4-20170711.0
xorg-x11-server-Xorg-1.19.3-11.el7.x86_64
xorg-x11-drv-ati-7.7.1-3.20160928git3fc839ff.el7.x86_64
package amdgpu is not installed
kernel-3.10.0-693.el7.x86_64
linux-firmware-20170606-56.gitc990aae.el7.noarch
package mesa is not installed
mesa-dri-drivers-17.0.1-6.20170307.el7.x86_64
package xorg-x11-glamor is not installed
libdrm-2.4.74-1.el7.x86_64

Now the built-in display behaves the same, but external displays have a chance to come back on subsequent switches.

Comment 6 RHEL Program Management 2020-12-15 07:46:47 UTC

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.