EzDevInfo.com

How do I list connected displays using the command line?

Is there a command that will list displays connected to the computer?

Specifically, I'm looking to find out how my external monitor is being detected by the system when connected by HDMI cable and what it's (not sure of the correct term here) hardware address is (eg. "CRT-0" or "DFP-1").

This is just a general question, but for reference, I'm using:

• Asus UL30JT laptop - running Ubuntu 12.04 beta and 11.10
• Asus PA238 23" monitor
• HDMI 1.4 cable
• Optimus graphics (Intel + nVidia GeForce 310M) - running with Bumblebee

Webcam doesn't work in browser...?

I'm running the latest version of Ubuntu, and I have a Dell Sp2009wfd monitor with built in microphone and webcam. I've gotten the microphone working on mumble and on sound recorder, and I've gotten the webcam to work on Cheese...but it WON'T work through the flash player//website webcam things. I -have- the flash plugin, and I have drivers installed for my video card. Could anyone help me figure this out? It's really frustrating.

Thank you...!

Split monitor in two

Is there a way to split a single monitor in two, so that the two halves will be treated as separate monitors? This means that windows should fill half the screen when maximized. Also, gnome panels should fill half the screen.

Display monitor info via command line

Is there a way to query monitor information from command line? For example, get monitor model, similar to e.g. what lspci does for graphic card info, or whether it's currently on or off, things like that.

If possible, what kinds of basic information such as the above can be easily gathered? For example, is it possible to determine if monitor is in portrait or landscape position? Or if it has built-in speakers or not?

Command line is the preference, but if there's a GUI method, I'd like to hear about it, too.

How to calibrate the monitor on an Ubuntu system?

What is the procedure to calibrate the monitor and what software to use?

Edit: I think what I mean is "colour profile" if that's what it is called. I happened to notice that the same photos look very differently indeed on my home laptop and on other computers…

How to set the monitor to its native resolution which is not listed in the resolutions list?

After installing Ubuntu 10.04 with my Samsung SyncMaster B2030, native resolution (1600X900) is not found in the list of resolutions.

How to monitor & log server hardware temperatures & load

I am looking for a way to log & monitor my server hardware temperatures and load (like for CPU or RAM). How might I do that?

Objective is to:

• ensure hardware is not heating up
• identify what should be upgraded & what is in excess (like perhaps to learn maybe not to get such a good CPU for example)

Ok I can use one of the applets that live in the task bar but what about logging?

Is there a program that tells ram usage? [duplicate]

Possible Duplicate:
How can I monitor the memory usage?

I have Ubuntu 12.4 LTS and I need a program that will be able to monitor my ram usage. Any suggestions?

How to see/change screen refresh rate or monitor frequency?

My eyes hurt so I thought I should check the screen refresh rate (monitor frequency), but I couldn't find it.

Where is it? (in Ubuntu 12)

How do I measure dimensions on screen without using a ruler?

I have an image on screen, and I want to measure its width. Of course I can use a ruler, but that's whimsical and slow. Is there something where I can click a shortcut key, drag out an area, and it will tell me the height and width of that area?

Something similar to Page Ruler for Google Chrome.

Currently, I am using Shift + PrtScn and dragging out the area, save the image, and then go into Properties to find out its height and width.

Turn off monitor using command line

I am runnning Ubuntu Server on my laptop. There is really no reason for the screen to be on. I have been trying to use this command to turn the screen off:

sleep 1 && xset dpms force off

The problem is I get the following error

unable to open display "".

Any idea what is going on / what is wrong? Any other suggestions for how to do this?

Manually turn off monitor

Can I turn off my laptop monitor manually and instantly with just a click or a simple terminal command? I just want to turn off my monitor not locking my machine. There is no dedicated turn off monitor button on my machine.

How to change the monitor's refresh rate?

How do I change the monitor's refresh rate in Oneiric?

There is no option to do it in the Displays dialog now. By default it's 60Hz, but I need 75Hz on my monitor.

In previous releases there used to be such an option in the Displays dialog.

Edit - Half baked solution

The best I could do so far was:

xrandr -s 1280x1024 -r 75

This is perfect, but my problem is that it isn't permanent. It defaults back to 60 Hz after logging out and back in.

Perhaps this should go into some script and added to startup? I just don't know how to do that.

How can I get my laptop's monitor size?

What is the Ubuntu linux command to find laptop monitor size? I want to know in inches if possible.

Thanks

How do I rotate my display when not using an X Server?

I have a widescreen monitor that rotates. I'm trying to use it in 'landscape' mode (vertical). This is easy in the GUI.

How do I rotate my display when I am not running an X Server or when I am viewing a Virtual Console / Terminal.