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Full Discussion: Screen Resolution Persistence Problem: RHEL 6.3
Operating Systems Linux Red Hat Screen Resolution Persistence Problem: RHEL 6.3 Post 302819143 by rchaud10 on Monday 10th of June 2013 11:40:17 AM
Old 06-10-2013
Wrench Screen Resolution Persistence Problem: RHEL 6.3
Good morning everyone,

I have been having screen resolution issues with RHEL 6.3. Our current setup is a laptop connected to a KVM/IP server. This is the desired scenario:

RHEL laptop
Windows XP laptop
KVM/IP server

The RHEL laptop has the file /etc/gdm/Init/Default populated with xrandr lines that set external monitors to 1600x1200 resolution.
When the Windows XP laptop is plugged into the RHEL laptop over KVM/IP, the KVM session should automatically get a resolution of 1600x1200. When the RHEL laptop lid is closed, it should pass the full RHEL desktop (with taskbar and icons) to the Windows XP KVM session with a resolution of 1600x1200.

When the user tries to log out or reboot the RHEL 6.3. Desktop within the Windows XP KVM session, it comes back as a blank screen. When the lid of the RHEL laptop is opened, it also has this black screen of death.

Desired Scenario: RHEL laptop is plugged to Windows XP laptop over KVM/IP. The KVM session, when started, gets a 1600x1200 resolution. When the lid of the RHEL laptop is closed, it gets a 1600x1200 full RHEL Desktop. When the KVM session reboots or logs out of the RHEL Desktop, nothing freezes. When the lid of the RHEL laptop is reopened, it comes back up nicely with both laptops showing their respective screens.

Has anyone had an issue with this black-screen-of-death effect? Do newer versions of Red Hat address this?

Thanks,

Rohit
 

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LEARN ABOUT SUSE

laptop_mode

LAPTOP_MODE(8)						      System Manager's Manual						    LAPTOP_MODE(8)

NAME

       /usr/sbin/laptop_mode - apply laptop mode settings

SYNOPSIS

       /usr/sbin/laptop_mode [ cmd ] [ force ]

DESCRIPTION

       This  manual  page  documents  briefly  the  /usr/sbin/laptop_mode command. laptop_mode is a program that applies the settings given in the
       /etc/laptop-mode/laptop-mode.conf configuration file. The primary use is to control the laptop mode feature included in Linux kernels  with
       versions  2.6.6	and  higher,  and  2.4.23  and	higher.  This feature increases battery life by letting your hard drive spin down. This is
       achieved by grouping disk write activity into "chunks" that are spaced at larger intervals than they normally would be. In addition to sup-
       porting	the  Linux  kernel's  laptop  mode  feature, /usr/sbin/laptop_mode also supports various power saving modules which are configured
       through configuration files in the /etc/laptop-mode/conf.d directory.

       It is not recommended to call /usr/sbin/laptop_mode directly to start or stop laptop mode, except in hardware event handlers. To apply  new
       configuration settings from laptop-mode.conf, call the laptop-mode service init script with the reload parameter.

COMMANDS

       Specify force as the second parameter to force laptop_mode to re-apply a state even if the computer is already in that state. These are the
       values that are allowed for cmd :

       auto	 Enable or disable laptop mode based on the current power state. Note that this will not do anything if  the  laptop-mode  service
		 has not been started!

       status	 Display a status report about everything that laptop_mode affects.

SEE ALSO

       laptop-mode.conf(8).

AUTHOR

       This  manual  page was written by Bart Samwel (bart@samwel.tk) for the Debian system (but may be used by others).  Permission is granted to
       copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later  version  published	by
       the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

																    LAPTOP_MODE(8)
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