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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6
votes
6answers
69k 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 ...
5
votes
2answers
1k 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
7k 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 ...
3
votes
1answer
3k 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
581 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
994 views

How to force native resolution on secondary monitor?

So, yesterday I installed Ubuntu on my laptop (1920x1200), which I mainly use docked with a second monitor (ViewSonic VA720, VGA, 1280x1024). At first the second monitor wasn't detected at all, so I ...
2
votes
1answer
3k 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
1answer
715 views

I set xgamma at startup, but it resets

I have a startup command to set my gamma in xgamma; whenever I log in, it flickers briefly to what I have it set to, then goes back to 1. Why? Is there a better way to adjust gamma defaults?
2
votes
3answers
8k 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 ...
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 ...
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 ...
4
votes
2answers
11k 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
399 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
414 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
2k views

Can't change brcm_monitor0 in /proc

I am trying to change the value in the file /proc/brcm_monitor0 from 0 to 1. This file is used to set Broadcom wifi modules into monitor mode. The default method to do this is: sudo -s echo 1 > ...
2
votes
1answer
832 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
2answers
778 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 ...
2
votes
1answer
2k views

Dual monitors with two Nvidia GPU's

I have two gtx 275s SLI'd, When I connect both monitors to same card it allows me to enable twinview, and it works. But when I want to connect each monitor to different cards, I lose the option of ...
2
votes
1answer
396 views

Ubuntu 11.04 Laptop Screen not working

Just installed Ubuntu 11.04 and my Laptop screen has stopped working, although an external monitor still works fine. It won't even display the bios. It stopped working during a debian upgrade ...
2
votes
2answers
17k views

Monitor not detected - low resolution only

I just installed Ubuntu 11.1 on my desktop pc. It was a clean install, no upgrading. I have a Samsung Syncmaster BX2450 connected to the PC. My problem is that I cannot make Ubuntu recognize my ...
2
votes
1answer
360 views

Screens don't work after shutting off

When my screens shut off after the configured amount of time, they don't turn back on again. I have to restart my computer because wiggling my mouse, etc doesn't turn the monitor signals back on. ...
1
vote
1answer
587 views

Monitor Does Not Wake Up

I have Xubuntu 14.04 installed on two PCs, each has its own monitor, different brands. With both PCs, if I turn off the monitor by power switch, turning it on does not work. In other words, when I ...
1
vote
0answers
127 views

Automatically detecting and outputing to s-video at startup

After combing the Internet I have developed a script that is capable of checking whether I have a monitor connected to my VGA port and switching to my s-video port if not #!/bin/bash # if no vga then ...
1
vote
0answers
1k views

Savage S3 and Lubuntu (or any flavour) 12.10 big issue

Please be nice with me: I spent all the night with it and I'm exausted. I've got an old Acer Aspire1300 15"(512+256RAM and 1.3 mhz cpu). I tried all night installing Lubuntu, XUbuntu.. lspci -k ...
1
vote
1answer
4k views

How to set the monitor to its native resolution when xrandr approach isn't working?

I am trying to setup my Samsung syncmaster B2030 monitor in ubuntu 12.04. It's native resolution is 1600x900 which I am not getting in ubuntu and which I am trying to get. I tried using xrandr ...
1
vote
2answers
2k views

How can I power-off the LCD on my Thinkpad?

I'm using ubuntu 12.04. When I use Fn+F3 on Windows the LCD turns off correctly. On Ubuntu it just puts the screen in screen saver mode. What should I do to have the same behavior on Ubuntu as on ...
1
vote
2answers
2k views

Dell E2009W monitor not detected

I have an issue with my monitor. I just installed Ubuntu 11.10, but the monitor that is plugged in doesn't appear anywhere. And by doesn't appear, I mean that in the "Displays" menu, it doesn't even ...
1
vote
1answer
1k views

Trouble recognising external monitor

I'm a first time Ubuntu user (using Ocelot) and know very little about computers. My laptop screen is broken and I'm trying to connect to an external monitor through a VGA cable but I can't get the ...
0
votes
1answer
415 views

Ubuntu 14.04 — 2 Monitors only acting as 1 monitor

So this is an issue of both my monitors ARE working, but they're being treated as if they're one monitor with a resolution of 3840x1200 * 1 instead of 1920x1200 * 2. I'm looking for the standard setup ...
0
votes
2answers
8k views

Second monitor recognized but only black screen

I am running 12.04 on a Toshiba Portege laptop. The graphics card is an Intel 945GM/GMS. The 2nd monitor is an Asus (Ancor Communications 22"). When I connect the monitor to the computer the monitor ...
0
votes
0answers
282 views

How do I get other resolution option other than default one in full screen? [duplicate]

I want to get my 1366x768 monitor to have other screen resolution 800x600 or 1240x768 in full screen. What option do I have? Thanks. Here what I did, shaharil@busuk:~$ xrandr Screen 0: ...
0
votes
1answer
292 views

Get Ubuntu to NOT move windows when turning off one of multiple monitors

I have a triple monitor setup and it works very well with 13.10. However, I have some problems with the way Ubuntu moves windows around when turning off a monitor. For instance, when I want to watch ...
0
votes
2answers
2k views

BandWidth Monitor

New to Ubuntu, I want a application which monitor my Bandwidth usage in GUI for Particular time. Is any application is available for my requirement? For ex: If I need to monitor for a month at a ...
0
votes
3answers
3k views

Screen resolution problems on Samsung monitor

I have a monitor Samsung 19' which resolution is 1440x900 (16:10 aspect ratio). When I set it in the recently installed Ubuntu 13.04, the bottom of the screen gets cut out Trying to change to another ...
0
votes
2answers
1k views

Not working Dual monitor on Radeon HD 5450

I use Radeon HD 5450. I need work with Dual monitor. One try (Not Working): The first monitor is in VGA onboard input. The second monitor on VGA Radeon 5450. Second try (Not Working): The first ...