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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7
votes
4answers
37k views

Screen resolution stuck at 1024x768 [closed]

I just updated from Ubuntu 10.10 to 11.04 and have an issue regarding the screen resolution. I have Intel integrated gfx chip and my monitor supports resolutions larger than 1024x768. (in 10.10 I've ...
9
votes
4answers
18k 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 ...
18
votes
2answers
16k 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.
10
votes
2answers
14k 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 ...
5
votes
3answers
15k 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 ...
19
votes
3answers
4k 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
4answers
31k 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 ...
9
votes
3answers
16k 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 ...
18
votes
4answers
23k 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
1answer
18k 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 ?
2
votes
1answer
9k 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 ...
15
votes
3answers
6k 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 ...
5
votes
2answers
4k 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 ...
4
votes
1answer
4k 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
1
vote
1answer
684 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 ...
4
votes
2answers
2k 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
519 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 ...
4
votes
1answer
5k 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 ...
4
votes
2answers
6k 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 ...
2
votes
1answer
724 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
595 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
3k 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 ...
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
0answers
229 views

Ubuntu 13.04 using vgaswitcheroo breaks monitor configuration

I've successfully disabled my ATI card using vgaswitcheroo but when I go to display settings I can see 2 monitors - one of them called "Unknown". I have only one display. When I turn ON the discrete ...
0
votes
4answers
15k 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 ...
5
votes
1answer
7k 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) ...
4
votes
5answers
9k 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 ...
4
votes
2answers
3k 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 ...
6
votes
2answers
3k 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 ...
6
votes
2answers
3k 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?
6
votes
3answers
3k 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 ...
5
votes
4answers
7k 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 ...
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 ...
6
votes
1answer
5k 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 ...
5
votes
5answers
32k 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 ...
1
vote
2answers
2k views

Monitor shuts off after installing Ubuntu 11.10 64-bit

I installed Ubuntu 11.10 64-bit successfully in nomodeset option, but when I boot the installed system the monitor shuts off, so I would like to know how to fix this like I fixed it in the ...
1
vote
3answers
6k 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 ...
0
votes
0answers
28 views

Upgrading from 2 to 4 monitors

I have Ubuntu 12.4 (precise), and for a long time, I had two monitors. Yesterday, I got a second pair of monitors and another video card. I spent hours searching the internet and experimenting, but I ...
0
votes
1answer
3k views

Ubuntu failed to detect monitor and very low resolution?

I tried different versions of Ubuntu from 11.04 to 11.10 beta, but got same problem. My desktop pc configuration is, - intel core i5 2400 - DH67BL Motherboard - Inbuilt motherboard graphics - No ...
6
votes
1answer
5k 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 ...
4
votes
2answers
5k views

Using AOC USB monitor on Ubuntu

I have recently moved from Windows to Ubuntu 12.10. I have an AOC portable laptop monitor (Model number e1649Fwu). This monitor works solely through USB. It works fine on Windows, but I cannot work ...
3
votes
1answer
125 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 ...
3
votes
1answer
218 views

Lock screen turn off and on : Goes to a loop asking to enter password to unlock- then turns off again.

I recently updated my laptop from 12.04 to 12.10. And now, whenever I lock screen with "CTRL+ALT+L", the screen locks, and monitor turns off. But within 30 seconds, it turns on and asks for password. ...
3
votes
0answers
411 views

Monitor will not be detected, stuck at 640x480 [duplicate]

Possible Duplicate: Getting screen resolution correct with nvidia drivers I'm completely new to Linux but know the basics of command entry. Here's what I've tried: First off, I installed my ...
2
votes
1answer
455 views

External monitor stopped working [closed]

I have an ASUS notebook with ubuntu 12.10. My external monitor was working fine but after unpluging/repluging it, it's now detected as "unknown" in my display settings, and I don't get any signal on ...
2
votes
1answer
1k 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
2answers
576 views

Automatically change resolution when not in dock

I have Ubuntu 11.04 (yep, I know it's old news) on my Lenovo W520. At home, I have a dock with dual monitors. I have a pretty decent setup - things work almost perfectly (hence the reason I'm ...