Questions that relate to the electronic display (sometimes called a visual display unit) for computers. Typically questions relate to visual issues such as flickering, resolution, black-screens together with the usage of single and multiple displays.

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33
votes
4answers
63k views

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 ...
32
votes
3answers
30k views

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.
31
votes
2answers
68k views

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)
25
votes
3answers
2k views

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 ...
20
votes
2answers
15k views

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 ...
20
votes
4answers
21k views

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 ...
19
votes
3answers
2k views

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
19
votes
4answers
67k views

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 ...
19
votes
3answers
5k views

notify-osd and dual monitors

I use Ubuntu 10.10 on a laptop, with an external monitor, which is used as the primary. Notify-osd alerts show on the connected monitor, as I want. However, some days ago I removed both gnome panels ...
19
votes
3answers
2k views

Stop an insolent narwhal from “correcting” monitor brightness?

I want total absolute control over the brightness of my laptop's screen. I want Natty to fear my wrath should it dare to presume my desire. Natty's light adjusting minions should quake in terror ...
15
votes
1answer
34k views

Adding a CPU monitor widget in the top corner like in Gnome2

I wonder if you can add a widget or something like it in the top corner (next to volume and WiFi and things like that) that displays current use of CPU and maybe RAM. I know you could add stuff like ...
15
votes
3answers
33k views

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 ...
14
votes
1answer
21k views

Could not apply the stored configuration for the monitor

I'm using Nvidia 7300 gt and monitor-Acer V173w, on 64 bit Ubuntu 10.04. Compiz and Emerald went well, but at the time of entry into the GUI, I always receive the message : "Could not apply the stored ...
14
votes
3answers
26k views

How can I get a DisplayLink USB monitor work under Ubuntu?

I have a DisplayLink-based external USB monitor, which has both power and data over USB, and seems to work perfectly under Windows 7, but only can display a text console under Ubuntu 10.10, and that I ...
14
votes
4answers
1k views

How can I make PDFs appear life-size when displayed at 100%?

When I open a letter size PDF and then zoom to 100%, the page physically displayed on my monitor is smaller than a real letter size sheet of paper. How can I make "100%" on the computer screen ...
14
votes
3answers
4k views

How do I set the native resolution on an HP Mini 210-1004sa?

FYI: My Netbook model is HP Mini 210-1004sa, which comes with Intel Graphics Media Accelerator 3150, and has a display 10.1" Active Matrix Colour TFT 1024 x 600. I recently removed Windows 7 Starter ...
12
votes
2answers
39k views

How do I set the correct monitor resolution with Nvidia drivers for a monitor that does not send EDID?

I keep having trouble getting the correct monitor resolution - every time I reinstall, I happen to use a newer Ubuntu release and the old tricks I used to know no longer work. Instead of leaving a ...
11
votes
7answers
25k views

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 ...
11
votes
5answers
38k views

Adjusting display geometry in a virtual machine?

Running 11.04 beta in a Parallels 5.0 virtual machine, but this question will apply to any virtualization software. Parallels 5 Linux tools (guest additions) don't work for 10.10 and 11.04 and I ...
10
votes
2answers
16k views

Two monitors when only having one in 13.10

I just did a fresh install of Ubuntu 13.10 64bit, and it says that I have 2 monitors, when I actually only have one I have a Dell XPS 15 with Nvidia graphics card if that helps in anyway
10
votes
2answers
15k views

How to disable laptop's LCD and use external monitor as only output?

My laptop's LCD broke and I removed it. Now I permanently added a monitor via HDMI. How can I set up Ubuntu 12.10 to only use and show the external monitor and disable the LCD? Right now, I cannot ...
10
votes
1answer
14k views

How can I mirror/flip display output?

For strange reasons best not asked, I have a projector plugged into my computer that is pointed at a mirror. So the computer image is displayed on a wall, but it is mirrored. In Linux(ubuntu) I can ...
9
votes
6answers
49k views

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?
9
votes
3answers
8k views

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 ...
9
votes
3answers
10k views

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 ...
9
votes
3answers
7k views

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 ...
9
votes
1answer
253 views

15.04: Launching some programs turns monitor off and on (like for a resolution change)

I just upgraded from 14.10 to 15.04 and one of the first things I noticed is that the monitor often behaves like it was changing the resolution (a click sound from inside the monitor, black screen, ...
8
votes
2answers
3k views

Where can I find an automatic day-night color balance adjuster similar to f.lux/Redshift that works with multiple monitors?

I tried f.lux, and I like what it does (automatically adjust the color balance of your monitors depending on time of day), but it seems to work on only 1 of my monitors. Can I configure it to work on ...
8
votes
6answers
38k views

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 ...
8
votes
2answers
9k views

How do I look up the hsync/vsync values for my monitor?

I'm trying to get my computer to use the correct resolution. For that I need to specify the horizontal and vertical sync values in the configuration file (xorg.conf): Section "Monitor" Identifier ...
8
votes
3answers
6k views

How do I find out monitor make / model?

My friend has recently bought a second-hand vehicle with an in-car computer and it's wired up to a touchscreen monitor on the dashboard (very impressive!). Now, I've helped him install Ubuntu on it ...
8
votes
1answer
936 views

Bypass low-graphics mode 12.10 when no monitor connected

I installed Ubuntu 12.10 and have set it to auto login, and have set up permissions to allow remote connections via VNC (using the default 'Desktop Sharing' application offered by Ubuntu). ...
7
votes
2answers
9k views

How to make custom refresh rate stay saved?

I'm testing out 14.04 on a partition to see if I want to use it as my main desktop for when it's fully released, but I've encountered some problems. I have a 144Hz monitor, so in the the Nvidia X ...
7
votes
1answer
30k views

How to install icinga on Ubuntu 12.04 & Monitor remote host?

How to install latest icinga & icinga-web on Ubuntu Server 12.04 & How to monitor remote hosts ?
7
votes
5answers
2k views

Why can't i choose output sound for each application?

I am using dual monitors, and i want to be able to play a movie with sound on the TV (through vlc or something) and then play youtube og some games with my headphones on my laptop. Is there anyway i ...
7
votes
3answers
26k views

frequency out of range - please change display mode

I just downloaded the latest version of the Ubuntu live CD, and have installed it on a desktop computer (a Fujitsu Scaleo P). Once installed it seems to work perfectly, although there are some updates ...
7
votes
2answers
7k views

Automatically kill a process if it exceeds a given amount of RAM

I work on large-scale datasets. When testing new software, a script will sometimes sneak up on me, quickly grab all available RAM, and render my desktop unusable. I'd like a way to set a RAM limit ...
7
votes
2answers
1k views

How to have launcher on non-primary screen?

I'm running Ubuntu 12.04 LTS on one computer with two monitors. I've found the place in settings where I can set the "launcher placement" and the "primary" monitor (using the black bar); however, I ...
7
votes
2answers
2k views

Using an iPad or Nexus 7 as an Ubuntu Second Monitor

Is there any way to use an iPad mini or a Nexus 7 as a second monitor through a cable? I dont want something like vnc, I need it to work through the usb cable (or any other cable). I imagine that the ...
6
votes
6answers
16k views

Second Screen is Rotated in a dual monitor setup

I have a laptop connected to a second monitor using a vga port. No proprietary drivers used. When I go to System Preferences --> Monitor and I turn that on it doesn't look as it should, and it's ...
6
votes
6answers
68k views

Ubuntu not detecting second monitor

I'm running Ubuntu 12.04 on a Lenovo x61s Thinkpad. As the screen's rather small and I want to do some video editing, I thought I'd plug in a monitor and use that. The monitor is Relisys JM777 (quite ...
6
votes
2answers
6k views

How to use shortcuts to switch between displays in LXDE?

How to use shortcuts to switch between displays in LXDE? I mean to switch between the laptop monitor and an external display. I edited /home/user/.config/openbox/lubuntu-rc.xml file to set shortcuts ...
6
votes
1answer
2k views

I have this weird issue with my monitor. How can I fix it?

I have been experiencing a few problem with my monitor HP TS-19SV even with the newly released Ubuntu 12.04 (although, this had happened before on Ubuntu 11.10, 11.04, 10.10 and 10.04. Basically, from ...
6
votes
2answers
4k views

Need to change the resolution options

I've been trying to add my external monitor's native resolution (1680x1050). It does not show up on the GUI "Monitors" I followed the "Adding Undetected Resolutions" section of ...
6
votes
1answer
1k views

Is it possible to use more than two monitors?

Is it possible to use more than two monitors in Ubuntu? If so, which graphics cards are known to work for example with three monitors in Ubuntu?
6
votes
1answer
140 views

Bind mouse to a concrete monitor in a dual screen setup with two independent pointers

Scenario is, bind my Wacom Bamboo to my second monitor and my mouse to the first monitor. The binding for Wacom Bamboo works perfect with the settings for the tablet. But how can I bind my mouse to ...
6
votes
1answer
1k views

Touch monitors for Ubuntu?

I'm looking for a touchscreen monitor that is at least 19 inches diagonally and is fairly cheap (hopefully a similar price to the Windows 7 touch monitors made by HP, Dell, Planar, etc., which are ...
6
votes
1answer
2k views

How to increase the default screen resolution without a monitor plugged in

i have kinda problem with setting my resolution on ubuntu 10.04 the thing is that i installed the machine and put it away without mouse, keyboard and monitor (i am currently remote with VNC viewer) ...
6
votes
1answer
7k views

Getting system to boot in headless mode set-up without display problems

Previously I had Ubuntu 11.04 and I could boot with no monitor attached. Now I have installed Ubuntu 12.10 with autologin and I've found that is incapable of booting correctly if the monitor isn't ...
5
votes
1answer
1k views

How do I run an I/O intensive application only when the computer is idle?

Is there a tool which can be instructed to pause specified processes if user uses a keyboard or mouse and to resume it in certain time after user has stopped interaction to the OS? I would like to ...