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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2
votes
1answer
1k 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 > ...
0
votes
1answer
4 views

could not switch on monitor configuration

On my asus x553 I have wiped the hard drive to eliminate win 8.2 and installed Ubuntu 14.04. On boot up I get the Error message could not switch on monitor configuation and als ocould not set ...
0
votes
0answers
8 views

Computer won't restore from monitor power saving

When monitor power saving mode is on and the monitor falls asleep, I can't wake it up and have to do a hard shutdown. I've tried pressing keys, moving and clicking the mouse, unplugging and replugging ...
0
votes
2answers
5k 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 ...
2
votes
2answers
4k views

Correct Display configuration. Errors while trying to arrange displays

I am trying to set up my tv with my laptop trough a VGA cable. The display application in Ubuntu throws a lot of errors to me and I have given up in trying to do it myself. I try to apply the 1920 ...
2
votes
1answer
44 views

Xubuntu 14.04.3 - Monitors turn of during boot

After installing Xubuntu 14.04.3, I can not boot into the system. Instead, after selecting ubuntu within the grub menu and pressing enter, a few messages are shown and the monitor turns of after ...
0
votes
0answers
15 views

blinking mouse cursor [closed]

weeks ago I installed Ubuntu on my brother's computer, the following days he told me than his mouse cursor was blinking and he couldn't use it. I have an idea, there was this unknow screen in the ...
1
vote
1answer
536 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?
0
votes
0answers
29 views

Force screen resolution for monitors using xrandr

I'm using two monitors and one of them is working properly. I have the option to set the screen resolution to 1366x768 (16:9) and is recognized as AOC Intl 19"" (plugged into my HDMI port with an ...
0
votes
0answers
25 views

How to choose monitor resolution that isn't showing up in “Display” Settings dialog

After installing Ubuntu 15.04, I can no longer find my monitor's native resolution in the Display Settings dialog. I can only select the modes "1024x768" and "800x600". How can I fix this?
4
votes
1answer
207 views

Spyder5 Monitor Calibration Ubuntu 14.04

I tried to get the Spyder5Express running under Ubuntu 14.04. Installed is dispcalGUI and the Argyll_V1.7.0 software. Unfortunately the device is neither detected in the GUI nor in the Terminal. I ...
-1
votes
1answer
28 views

Laptop suspends on shutdown with lid closed

I'm struggling to phrase this question very coherently, but here's what I'm struggling with... I have a Lenovo laptop from a few years ago. Recently, I put ubuntu on it. As it stands right now, I've ...
11
votes
3answers
22k 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 ...
3
votes
0answers
541 views

Can't select 2560x1440 resolution even though I know it's possible (I have proof!)

I have a new monitor, (the Dell U2515H) which I'm trying to drive at 2560x1440 resolution (just 30hz) over HDMI using only the onboard graphics on my machine (Intel HD4000 found in the ivy bridge ...
3
votes
1answer
963 views

Can't get the right resolution for external monitor

This problem is probably pretty specific to my hardware, but I'm getting frustrated with my limited knowledge on things I might try to solve it, so I post it anyway and hope for help :) I've got a ...
0
votes
1answer
35 views

Monitor goes black

Just installed 14.04 on my computer and after I solved my core-heating-problem, the new problem is that after 1 minute on desktop, either doing things or not - the monitor goes black.. No time to ...
0
votes
0answers
32 views

Black border with Ubuntu 14.04 on Raspberry Pi 2 Model B

As the title states, I'm getting a black border on my screen running Ubuntu 14.04 on a Raspberry Pi 2 Model B. I've tried modifying the /boot/config.txt file and tweaking/disabling the overscan, as ...
0
votes
0answers
9 views

High resolutin but 'empty' spaces on the monitor

I'm using Ubuntu 15.04 on my new notebook. I tried to change my screen display resolution to make it fit all the screen but I don't know why even if I set the high resolution possible I still can see ...
0
votes
0answers
14 views

Why won't my monitor get a signal after bringing PC out of suspend?

Every time I suspend my PC and then press the power button to start it up again, my monitor remains dark though the PC is running. Why is this?
0
votes
0answers
42 views

Can't disable automatic mirror display

I just plugged an external display and the system detected it automatically. However, the two monitors display the same and when I go to Display preferences, it looks like it wasn't detecting any ...
0
votes
0answers
38 views

2nd monitor detected but no signal

Beginner here,(Ubuntu 12.04.1LTS) Currently this is my setup- 1.Vga - vga (1st monitor). 2.Hdmi to Vga converter - vga (2nd monitor). 3.HD4870 with fglrx drivers. After i connected my ...
0
votes
0answers
24 views

mac mini 2014 monitor wake up issue

My 2014 ubuntufied macmini wakes up from sleep but the monitor doesnt. i guess the mini is missing out sending a signal to it. i had the same issue in osx but after the latest update that went away ...
1
vote
0answers
32 views

Second external monitor connected but screen is black Ubuntu 14.04

I have a strange problem with my second external monitor. It won't wake up automatically when my laptop starts, or when the laptop wakes up from standby or sleep mode. It will be on if I manually ...
3
votes
2answers
6k views

Turn off laptop display and have monitor

My laptop display has stopped working and is unfixable! Anyway, I got a full HD monitor and plugged that into the HDMI port of the laptop. I have changed the power settings so that I can close the ...
0
votes
0answers
20 views

intel-virtual-output -f XIO fatal error

After a fresh installation of ubuntu 15.04 i've updated the packages. And whenever i try to run intel-virtual-output -f it give me :- XIO: fatal IO error 11 (Resource temporarily unavailable) on X ...
0
votes
0answers
47 views

XB240H Abprz (144hz, 1080p, GSync) only running at 60hz without GSync! Solution?

I run Ubuntu GNOME 14.04 Trusty Tahr with a GTX970, 4790k, 16gb DDR31866, etc. I have the XB240H 24 inch, and it is running at 60hz. The on-board monitor options do not let me modify this, and when I ...
0
votes
1answer
62 views

Lubuntu boot: no signal once in two

I have a strange problem with a fresh installation of Lubuntu 15.04 (Ubuntu 11.04 was ok). Sometimes when I boot the computer the monitor goes in "No DVI signal" mode right after grub selection. ...
0
votes
0answers
44 views

Grub acting up, and monitor resolution not detected - Ubuntu 14.04 Gnome

I've been having a lot of trouble with this lately and wanted to check if anyone here had a solution. I installed Ubuntu GNOME 14.04 on my secondary drive, but now when I boot up I get into the GRUB ...
0
votes
0answers
25 views

Ubuntu Gnome 14.04.2 not detecting my monitors resolution [duplicate]

I just installed Ubuntu Gnome 14.04 LTS on my gaming/design machine! (Specs: i7 4790k; Strix 970; MSI G45-z97;) and when I go into my display settings it says I'm using a built-in display and will ...
1
vote
1answer
27 views

How come I don't see grub every time I boot? [duplicate]

I have noticed that when grub boots up I don't get a black screen on my monitor. I want to make it so that it will show every time I boot, not just when I turn it off manually and then turn it on ...
0
votes
3answers
2k 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 ...
1
vote
1answer
199 views

External monitor is disabled after resume (only on 15.04)

I recently installed ubuntu 15.04 and most things just work out of the box, awesome! But there is on annoying thing: I have an external screen connected to my machine (T450s, via docking station) and ...
0
votes
0answers
13 views

Screen scaling corruption after error dialog

I got an old laptop (Lenovo X300) someone was throwing out and decided to put Ubuntu on it. I haven't messed with Linux much since the Redhat 6 days. Periodically, an error dialog pops up saying an ...
12
votes
2answers
17k 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 ...
0
votes
0answers
17 views

Can't find monitor type on MacBook Pro - 14.04

Having some serious issues locating the name of my monitor for use in the command iw wlan0 interface add mon0 type monitor. I have the Mid-2014 MacBook Pro, also known as version 11.1. I'm running ...
0
votes
2answers
2k views

No video signal after install

Today I tried to install Ubuntu 12.10 to my machine, but all the time I encountered the same problem, I successfully boot from Ubuntu 12.04 DVD, and a purple background comes up with accessibility and ...
1
vote
1answer
1k views

How to setup Asus MB168B USB monitor in Linux Mint?

is the first time I write here. I bought an external usb monitor http://www.asus.com/it/Monitors_Projectors/MB168B/; I have an Asus s56cb with dual boot, linux Mint 17 qiana and windows 7. On ...
10
votes
3answers
13k 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 ...
9
votes
1answer
169 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, ...
5
votes
2answers
775 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 ...
1
vote
1answer
114 views

Dual Monitors Stayed Mirrored

I am running a T450 with Intel HD Graphics 5500 with Ubuntu 14.04 LTS. I am also using a Lenovo Ultra Dock that supports a DVI input and a VGA input. Whenever I connect two monitors to both the DVI ...
1
vote
2answers
157 views

Custom Shortcut for switching off the display

I want to add a Custom Shortcut (Keyboard → Custom Shortcuts → Add) for turning off the display but to do that, what 'Command' should I should use? I want to set a button to switch off the ...
1
vote
2answers
237 views

External monitor horizontal lines problem

I got problem with my external monitor (Dell U2312HM) connected to my laptop (Radeon HD4570). There are appearing some horizontal lines. It is like blinking or flickering, it's actually quite hard to ...
1
vote
1answer
50 views

Monitor showing as DVI although plugged in as VGA

Recently I had my computer upgraded because I was having problems getting Ubuntu 14.04 to work. I now have more than the min requirements but am still having trouble getting the graphics to work once ...
10
votes
6answers
20k 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 ...
8
votes
2answers
14k 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
0answers
28 views

I have a “Element” brand monitor and the driver show up unknown

Have the latest 14.04 Ubuntu with a GeForce 7600GS video card. I have downloaded the latest Nvidia 304.125 from Nvidia 304 open source. I have a "Element" monitor. My display shows up as unknown. ...
0
votes
1answer
48 views

Refresh rate won't accep 120 hz

I can't get my monitor to set the refresh to 120hz. I'm using an nvidia gtx 970. The outputs are below (I'm using a 120 hz monitor & I was able to set it to 120hz in Ubuntu 15.04 when using an AMD ...
7
votes
3answers
22k 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 ...
1
vote
1answer
642 views

Adding a large asus monitor resolution

I am trying to set up this monitor: http://commercial.asus.com/product/detail/vs247h-p-lcd-monitor I am able to connect the monitor and use it in various screen configurations, but have not yet been ...