How do I prevent an external monitor from shutting off when closing my laptop lid?

Posted by Thom on Ask Ubuntu See other posts from Ask Ubuntu or by Thom
Published on 2012-06-17T15:55:32Z Indexed on 2012/10/20 23:20 UTC
Read the original article Hit count: 276

Filed under:

12.04

|

power-management

|

external-monitor

I've seen this issue on previous versions of Ubuntu, but not on 12.04 and some of those are resolved bugs, so I'm asking again.

I've set up power management so that, when plugged in, my laptop does nothing when the lid is closed. I do this so that I can use as a desktop with my external monitor with the screen closed and the laptop scurried away from my desktop.

I tried turning off the laptop monitor to see if that made a difference, but it doesn't.

The problem is that closing the lid still shuts off my external monitor. What can I do to prevent this?

© Ask Ubuntu or respective owner

Related posts about 12.04

Wipe 12.04/Windows 7 dual boot setup and start fresh new 12.04

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have an Asus u56e laptop running dual boot setup, Windows 7 and 12.04. I had Windows 7 first. I was wondering what's the easiest way possible to erase/format my drive (500GB) so that it deletes Ubuntu and Windows 7 so I can reinstall 12.04 onto my whole drive? Does the Ubuntu Live CD help make this… >>> More
In 12.04: Failed to load session 'ubuntu' [closed]

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do? I'm using 12.04 beta. Today I was prompted to install some updates, which I did, followed by a reboot. On reboot, X starts, but all I see is a single dialog window in the middle of the screen… >>> More
Will final version of 12.04 use the power management changes found in kernel 3.3

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have seen in some version of Ubuntu that instead of making a huge change to update to the latest kernel, they take some of the good stuff out of it, for the sake of stability and put it on a previous version. In this case, kernel 3.3 has seen some very good power management enhancements that are… >>> More
Wired PS/2 Keyboard and Mouse do not work in 12.04 Live CD or after fresh 12.04 install - Foxconn D270S Atom Motherboard

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
My Wired PS/2 keyboard and mouse do not work in 12.04, either in a fresh install or from the Live CD. A USB keyboard and mouse will work. The PS/2 keyboard and mouse will work using the same hardware and a fresh 10.04 Ubuntu install or a fresh Windows 7 install. The motherboard is a Foxconn D270S… >>> More
Difference between 12.04 and 12.04.1

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I recently did a fresh install of Ubuntu 12.04 two days ago. Or at least I thought it was 12.04, but actually 12.04.1. Now I'm having errors popping up from the grub loader. Error: no video mode activated which was apparently resolved in this bug# 699802. However these workarounds are for 11.xx… >>> More

Related posts about power-management

Vista Power Management GPO

as seen on Server Fault - Search for 'Server Fault'
Hi, I've created a loopback GPO that has several settings (both computer and user) including a Custom User Interface (Access 2007 Application) and Power Management (has the computer sleep after being idle for 2 min). I'm also filtering so that this policy does not apply to "Admins" - only to "Users"… >>> More
Diable Power Management in Fedora 12

as seen on Super User - Search for 'Super User'
How to disable the power management in fedora 12, so that lcd/monitor should not go to sleep/off when system is idle? >>> More
Diable Power Management in Fedora 12

as seen on Super User - Search for 'Super User'
How to disable the power management in fedora 12, so that lcd/monitor should not go to sleep/off when system is idle? >>> More
Windows 7 power management in Boot Camp mode

as seen on Super User - Search for 'Super User'
I have a Macbook Pro with Windows 7 installed in Boot Camp. I have serious problems with the power management and not sure why. I have the default Balanced power plan selected. Many times when I close the laptop and leave it for more than just a few minutes, when I open it back up, it does not awake… >>> More
Windows - CPU power management APIs

as seen on Stack Overflow - Search for 'Stack Overflow'
What APIs are provided by Windows for CPU power management (I'm interested in CPU frequency scaling, setting min and max CPU frequency - similar to what you can do in Control Panel in power plans, but in a programmatic way). I'm also interested in .Net APIs. >>> More