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Bug 744495

Summary: external monitor got black screen after boot up in dual screen extend setup
Product: Red Hat Enterprise Linux 6 Reporter: Gris Ge <fge>
Component: xorg-x11-utilsAssignee: Adam Jackson <ajax>
Status: CLOSED NOTABUG QA Contact: Desktop QE <desktop-qa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.2   
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-10-09 03:31:51 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Gris Ge 2011-10-09 02:54:18 UTC 
Description of problem:

I am using Thinkpad T410 for dual screen extend setup with repo: RHEL6.2-20111005.1 .
After power on, the external moditor got black screen but xrandr show it have already set it up with correct resolution.

Screen only goes back if unplug and plug again the VGA cable or these commands:
====
if [ $? -eq 0 ]; then
    xrandr --output VGA1 --off
    xrandr --output VGA1 --auto
    xrandr --output LVDS1 --auto --left-of VGA1
====

Version-Release number of selected component (if applicable):
RHEL6.2-20111005.1

kernel-2.6.32-206.el6.x86_64
xorg-x11-xauth-1.0.2-7.1.el6.x86_64
xorg-x11-server-Xorg-1.10.4-3.el6.x86_64
xorg-x11-drv-intel-2.16.0-1.el6.x86_64
xorg-x11-utils-7.4-8.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Connect a external screen via VGA of T410
2. Power on

Actual results:
external monitor got no display

Expected results:
external monitor got correctly display

Additional info:
If screen is online, reboot OS will not got any problem.

I try with and without xorg.conf, they are the same issue.
Here is the xorg.conf
==========
Section "Monitor"
        Identifier   "laptop"
EndSection
Section "Monitor"
        Identifier   "VGA"
    Option "PreferredMode"  "1680x1050"
    VertRefresh 60
    Option "RightOf"  "laptop"
#    Option "Ignore"   "true"
EndSection

Section "Device"
        Identifier  "Intel Core 5"
        Driver      "intel"
        BusID       "PCI:0:2:0"
    Option      "monitor-VGA1" "VGA"
    Option      "monitor-LVDS1" "laptop"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Intel Core 5"
        Monitor    "laptop"
    DefaultDepth  24
        SubSection "Display"
                Depth     24
        EndSubSection
EndSection
==========
Comment 2 RHEL Program Management 2011-10-09 03:28:28 UTC 
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. Red Hat invites you to
ask your support representative to propose this request, if
appropriate and relevant, in the next release of Red Hat
Enterprise Linux. If you would like it considered as an
exception in the current release, please ask your support
representative.
Comment 3 Gris Ge 2011-10-09 03:31:51 UTC 
It's my mistake. The running kernel is still 131.

After switch to kernel 205, problem gone.

CLOSE this bug.