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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26
votes
2answers
25k 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.
11
votes
5answers
31k 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 ...
7
votes
3answers
21k 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 ...
11
votes
2answers
21k views

How can I get a DisplayLink USB monitor under Ubuntu (any recent version)?

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 ...
20
votes
2answers
49k 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)
7
votes
3answers
10k views

Ubuntu 14.04 - Add Fake Display when No Monitor is Plugged In

I have an Ubuntu 14.04 server that has no external monitor connected. I use NoMachine to remote control the machine. When I do so, the Unity/Gnome interface doesn't see any monitors connected, so I ...
14
votes
4answers
51k 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 ...
12
votes
2answers
29k 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 ...
25
votes
4answers
44k 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 ...
7
votes
2answers
13k 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
17
votes
3answers
12k 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 ...
7
votes
1answer
27k 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 ?
22
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 ...
5
votes
1answer
6k views

How do I configure a displaylink USB monitor?

I have seen many pieces but not a comprehensive guide to fix what must be a very common problem, particularly in Ubuntu 11.10 where there is no xorg.conf file. Is there an easy how-to somewhere (for ...
2
votes
1answer
12k views

Edges of screen cut off in Ubuntu 12.04 [duplicate]

I have a Visio 19" t.v that I am using as a high-def monitor. I am using a PCI graphics card (EVGA GeForce 8400 GS). I am using an HDMI cable to transmit the display. I have already checked and ...
2
votes
1answer
3k views

Monitor Preferences > Monitor: Unknown

root@tarvid-laptop:~# ddcprobe vbe: VESA 3.0 detected. oem: Intel(r)Cantiga Graphics Chip Accelerated VGA BIOS vendor: Intel Corporation product: Intel(r)Cantiga Graphics Controller Hardware Version ...
14
votes
2answers
10k 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 ...
5
votes
2answers
5k 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
3answers
6k 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 ...
4
votes
2answers
8k views

see my desktop on two monitors Lubuntu

Ok I have an ascer aspire with a AMD Radeon HD 6320, when I try to connect a CRT monitor in to it I can see the same desktop in the 2 monitors. I want to see in the 2 monitors se same desktop as a ...
1
vote
1answer
1k views

ATI Mobility Radeon HD 4xxx not recognized

I recently installed Ubuntu 12.04 alongside Win7 on my HP Pavillion dv6-2020eg. Ubuntu does not recognize my ATI Mobility Radeon HD 4xxx graphics card. It just says "unknown" in the information box ...
6
votes
2answers
811 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 ...
4
votes
2answers
3k views

Unable to Resume after Screen has Locked

I am not able to resume a session after the screen has been locked for a long time. This is not a new problem. Similar questions have been posted in the past, two of which are listed below. Black ...
2
votes
1answer
803 views

Schedule to turn off monitor via crontab?

I want to turn off monitor on a specific period of time automatically (for example between 07:00 and 11:00). Is there any command to be set in crontab file? Is there any better way? In summary: ...
2
votes
2answers
3k views

Using a displaylink usb video adapter

I just bought this USB graphics adapter and I need to use it on Ubuntu 10.10. I followed this guide, but when I ran $ ./configure && sudo make install && make check nothing ...
1
vote
2answers
179 views

Ubuntu eye strain problem?

Hi I saw lots of posts here regarding Ubuntu eye strain issue. But none could answer my question. I use Intel i5 processor, AMD radeon Graphics card. When I use my Win 7, there is no issue with my ...
1
vote
1answer
159 views

Color Problems on New Install of 14.04

I'm new to Ubuntu (and Linux), and just installed it next to Windows 7 on my Dell Inspiron 5737. Everything seems to have worked great except that the color is very messed up on my screen. It is ...
3
votes
1answer
4k views

How to force a higher screen resolution from Ubuntu 12.04 and an NVidia GTX460?

I'm running Ubuntu 12.04 x64, kernel 3.2.0-24-generic with an NVidia GTX460 and an Achieva Shimian QH270-Lite 2560 x 1440 monitor connected by a dual-link DVI cable. I've installed the ...
2
votes
1answer
798 views

Installing nvidia driver?

I have ubuntu 12.04 running on my laptop. I've been trying to install a 2nd monitor on it, but ubuntu does not detect the second monitor. I have an nvidia card on my laptop, and ubuntu was using the ...
1
vote
1answer
1k views

configure modeline Ubuntu 12.04

I am running Ubuntu 12.04.2 in dual boot with Windows 7 on the same drive. In Windows, I customize my refresh rate for my 2nd monitor with the program powerstrip. When I export my Linux modeline and ...
1
vote
1answer
1k views

How to connect USB monitor? [duplicate]

I have a Mimo monitor and it runs USB. I tried and failed and I don't know what to do......All i get from the USB screen is just a green screen. Anyone could help me?
0
votes
4answers
17k views

Ubuntu 12.10 won't display properly after kernel upgrade [closed]

After updating my system today, Ubuntu's doesn't display correctly. The desktop was working properly before, but now it looks like this: I had to use the terminal to run Synaptic package manager, ...
13
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 ...
7
votes
3answers
4k 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 ...
3
votes
3answers
21k views

How do I get Ubuntu 12.04 to detect my monitor correctly?

I am using an old CTX monitor (CRT). The computer is also old (processor is Pentium 4, 2.8 GHz) operating with VESA drivers. Ubuntu 12.04 detects this monitor as "Laptop" (even though it is a ...
7
votes
5answers
27k 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 ...
5
votes
1answer
10k views

How to save the current Xorg configuration to Xorg.conf?

I've this situation/hardware on my desktop PC: Ubuntu Linux Oneiric 11.10 (32 bit) Monitor Asus VW222s (22'') 01:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 8800 GS] (rev a2) ...
5
votes
2answers
5k views

Prevent external monitors from shutting off when laptop lid is closed? [duplicate]

Possible Duplicate: How can I tell Ubuntu to do nothing when I close my laptop lid? I'm running my laptop essentially as a desktop, I have two external monitors hooked up, a bluetooth ...
8
votes
2answers
7k 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 ...
6
votes
2answers
5k views

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 but how to do it for this specific purpose?
5
votes
6answers
12k 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 ...
4
votes
2answers
3k views

How do I set up a headless server via VNC?

I'm trying to configure my system to run headless and access the desktop via VNC when necessary. It seems everytime I unplug the monitor while ubuntu is running, the system freezes and I am forced to ...
5
votes
2answers
700 views

Turning Monitor Off With an Icon

I'm running Ubuntu 12.04 on my laptop and sometimes want to turn the display off immediately (without closing the lid and without waiting for it to turn off by itself). I'd prefer not to have to run a ...
5
votes
1answer
6k views

How to boot Ubuntu without a monitor plugged in?

How to boot an Ubuntu 12.10 without Monitor/Keyboard/Mouse I'm using as server and connect to it through Remote desktop viewer No problem with 12.04 but after the upgrade I receive the message Low ...
5
votes
5answers
51k 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 ...
3
votes
1answer
2k views

Monitor displays signal out of range until the graphical interface is loaded after installing

When the computer is booting all I get is the error message displayed by the monitor. I need to be able to choose the OS during startup however. I'm using a 1024x768 on this monitor, though it maxes ...
2
votes
1answer
175 views

unable to switch screen in Kubuntu 14.10

I recently moved to Ubuntu from Windows and I'm using Kubuntu 14.10 now. I have a laptop with an external monitor. The problem is, I am not able to switch between the monitors with Kubuntu running. ...
2
votes
1answer
2k views

Ubuntu 12.04 dual monitor “unknown monitor” problem

I have a problem with my monitors, one of them is detected as samsung electric company 19", and another is unknown and I cant set resolution for it higher then 1024x768.
2
votes
3answers
7k views

How can I set my resolution to 1280x1024 on an Acer Aspire Revo 3700?

FINAL UPDATE: Here is the best solution that I found after going through this problem lots of times. The question below is outdated because as it turns out the computer is not the problem; the ...