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
5answers
67k 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 ...
0
votes
0answers
33 views

Problem with upgrading to Ubuntu 16.04: resolution messed up. “Could not apply the stored configuration for monitors”

I'm a bit of a newbie to Ubuntu. I use it via a virtual machine (Parallels on Mac OS 10.10.5)--although this shouldn't matter, as far as I know. I just updated to version 16.04. On start-up, I get ...
7
votes
2answers
11k 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 ...
0
votes
0answers
10 views

I can't turn my built-in display back on after turning it off

I am using a T.V. (Insignia LED) as a second monitor. After deactivating my built-in display I am unable to reactivate it through my display settings.
0
votes
1answer
38 views

Acer H243H external monitor distorted in Ubuntu 16.04 and up

I've been using an Acer H243H monitor for a while with Linux for a while without problems, but now, I've been having serious distortion problems. In Ubuntu 16.04 and any Linux distro based upon that ...
1
vote
1answer
42 views

Correct Monitors Not Detected on 16.04 Nvidia or Nouveau

Upon installation of 16.04, a Dell 2408WFP was not detected by the default Nouveau driver. I then installed the actual Nvidia driver hoping for a different result, but that yielded the same result. ...
3
votes
2answers
274 views

Can I make a screen switch from one computer to another by cli?

I have my monitor hooked up to computer A via DVI and to computer B via VGA. If I start PC A first and PC B last, the monitor displays PC A's signal. Is there an easy way to change between the two ...
3
votes
2answers
552 views

How can I mirror one of the screens in a 3-monitor setup?

Is it possible to have 2 extended monitors and get the third being a mirror of one of the two extended? I'm pretty sure it's not possible through the interface but it may be possible through ...
0
votes
0answers
31 views

Dual monitor not working

II am using ubuntu 16.04. I have 2 monitors 1 is connected with my nvidia 660ti(23in) through HDMI port and the other one is connected with built-in motherboard (VGA port). after starting ubuntu 2nd ...
1
vote
2answers
9k 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
1answer
23 views

airodump-ng not working

I am a beginner to Linux. I am having trouble with the command airodump-ng mon0. As soon as I do it I see the error: Interface mon0: ioctl(SIOCGIFINDEX) failed: No such device. I have tried: ...
3
votes
2answers
7k 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 ...
1
vote
1answer
454 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 ...
1
vote
3answers
6k views

2560 x 1080 Screen Resolution on Ubuntu 14.04

I recently installed Ubuntu 14.04 on a mac mini and bought a 2560 x 1080 ultrawide LG monitor for it. Problem is that it doesn't display the proper resolution, the maximum being 1920 x 1080 under ...
0
votes
0answers
19 views

monitor broke, switched to new monitor, now have unsupported resolution black screen

New Monitor has HDMI and VGA, New Monitor does not have DVI. Computer video card has VGA and Digital video, videocard does not have HDMI. My only plug in option is vga. Ubuntu now can not detect the ...
0
votes
0answers
28 views

Has anyone tried dell xps 13 9350, ubuntu 16.04 LTS with HP Pavilion 27xw 27-in IPS LED Backlit Monitor

Maximum supported resolution on the monitor is 1920 x 1080 . I am able to set the ma resolution to 1280x720 . Is there a way we can improve it. Apparently HP supports only windows.
2
votes
1answer
119 views

External monitor(s) dark out on one account and I cannot set monitor layout, how to fix?

Seemingly "out of nowhere", my Dell e7440 running Ubuntu 16.04 with 2 external monitors displays only the login screen for external monitors, when I login it shows system error and external monitors ...
1
vote
1answer
79 views

Set default Resolution system wide [duplicate]

I'm using Ubuntu 16.04. addicted@ADDICTED:~$ xrandr Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 ...
0
votes
0answers
14 views

External screen flashes after changing resolution

I used xrandr to add the resolution of my external monitor (1920x1200). When I first did it, last year unsing Ubuntu 15.04 and Ubuntu 15.10, it worked fine, except that I couldn't get the settings to ...
1
vote
0answers
33 views

Getting Monitor to Use it's Native 2560x1080 Resolution ; Ubuntu 16.04?

I have two monitors and it isn't letting me select 2560x1080 for my one monitor when I go into settings. I've searched and found a couple of answers but none seem to fix my issue. I have a Nvidia GPU, ...
2
votes
3answers
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 ...
0
votes
0answers
27 views

Could not apply the stored configuration for monitors [duplicate]

Could not apply the stored configuration for monitors Error on line 1 char 1: Document must begin with an element (e.g. ) No clue why it happened or what to do. Intel 4400 i3 4010U Dualbooted with ...
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
0answers
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 ...
0
votes
0answers
20 views

Suggest me the tools for display testing on Ubuntu [duplicate]

I'd like to test my new Dell monitor but I don't know what the tools should I use for it. I'd like to detect if there are bad pixcels and other color characteristics of the display.
0
votes
1answer
99 views

Ubuntu 64 bit 16.04 LTS on laptop Hp Pavilion X2 external HDMI monitor stopped working after latest updates

It seems that Ubuntu is really a problem on HP computers. Now, the new problem is that after the last updates of 16.04, the HDMI port stopped working. I tried with a different monitor and the problem ...
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 ...
1
vote
0answers
190 views

16.04, Nvidia GTX 950, HDMI: Unknown Display

I just freshly installed 16.04 including all updates. I installed the nvidia-367 drivers which work. Unfortunately, my Asus display that is connected to the Nvidia GTX 950 via HDMI, is not properly ...
0
votes
1answer
236 views

Second monitor not working after Xubuntu 16.04 upgrade

I just upgraded from Xubuntu 15.10 to 16.04 via dist-upgrade. After I restarted, the monitor that is connected (via HDMI-to-DVI-cable) to my laptop wasn't recognized anymore. I already restarted two ...
0
votes
0answers
53 views

Need help getting back the plymouth splash screen with the right resolution (after nvidia install)

Normally I never have any problems getting back the plymouth splashscreen after installing nvidia drivers in Ubuntu or Linux mint etc. But now I've installed Ubuntu on an old PC with a APG (Geforce ...
4
votes
0answers
1k views

15.10 Dell XPS 15 (9550) External Monitor not waking

I'm in Ubuntu 15.10, with Kernel 4.3. Things are working better than I could ever imagine. Other than ONE bug... When my laptop turns off it's screen and my external monitor's screen (I have it set ...
0
votes
0answers
83 views

Ultrawide monitor only showing desktop on part of the screen

I'm currently running Ubuntu 16.04 LTS on a MSI Dominator Laptop, and with the laptop screen disabled and only using my external monitor (LG 34UC88 @ 3440x1440 21:9) Ubuntu refuses to display across ...
3
votes
0answers
2k views

How do I remove black bars on top and bottom of my display?

I have a problem with my ubuntu 12.04 LTS. It shows my Samsung Electric Company 17'' strange. It is not centered. I have a black space up and right. The pictures will explain better my problem: ...
0
votes
0answers
28 views

Intel NUC with ViewSonic 24" has snowy screen aliasing

I believe what I'm experiencing is "aliasing" of certain colors on my monitor, but I might not be using the best terminology. Here's what's happening: Certain colors, like the default Kubuntu ...
0
votes
1answer
477 views

HDMI stops working with my new Acer aspire E3-112

I bourght a new Acer Aspire E3-112. I use external screens both at home and at work. After installing Ubuntu everyting worked. I used it at home and at work. The second day when I got home the ...
1
vote
0answers
29 views

Ubuntu detects a fake monitor each reboot

When I turn on the Ubuntu, it detects a monitor that does not exist and I must desactive it each time I log in my session: What can I do to delete permanently this fake monitor? The system is ...
0
votes
2answers
44 views

How to show size Ram and CPU ussage in Ubuntu?

I am newbie in use Ubuntu so I don't know how to show Ram and CPU usage which is the same in Task Manager on Windows. It can show by command line in Ubuntu or Application to see more.
1
vote
1answer
89 views

Built-in laptop monitor is not detected anymore

The problem The built-in monitor of my laptop is not detected and goes blank at the login screen. However an external monitor connected to the VGA port is correctly detected and gets recognized as ...
1
vote
0answers
26 views

Monitor : no image after turning off then on

I would like to use my monitor as display for two computers, so I would like to switch the input as I want beetween the computer 1 and the computer 2. When I switch on the computer 2 everything is ...
3
votes
2answers
81 views

chrome resolution changes when monitor is turned off

Having an issue with Google Chrome resolution/dpi changing when I turn my monitor off. I'm pretty sure that this is all related to the scaling factor from Universal Access Panel. in which I have large ...
0
votes
0answers
29 views

How to install a resource monitor in Xubuntu 16?

I want to install something like this: But I researched and I don't find anything. Thank you.
0
votes
0answers
57 views

Primary screen turns off after disconnecting external monitor

I have a Dell external monitor connected to my ASUS UX305UA laptop. I use HDMI port, which is connected to HDMI-VGA converter, which connects to the monitor. When I turn on my laptop and connect the ...
0
votes
0answers
25 views

How do I fix overscan?

Please don't mark this as duplicate! I have read many similar question but could not find a good answer for my situation. I am running Ubuntu 15.10. I have a Sansui SLED2900, which works fine over ...
0
votes
0answers
101 views

Ubuntu flickering @ 144hz AMDGPU

I need some help. I've been trying to get 16.04 on my system since the second alpha came out but sadly whenever I try to run it the screens starts flickering like crazy when I start going through ...
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
0answers
147 views

Unknown Display on ubuntu 16

Hey I'm having trouble with my display. When I go to System Settings > Display the monitor shows as unknown display. I've googled and tried a couple of solutions they offered and nothing, changed ...
0
votes
0answers
23 views

How to completely reset xrandr

Is there any command which completely resets all settings of xrandr? I have checked this and this but the command xrandr -s 0 does not reset brightness.
0
votes
0answers
25 views

Ubuntu 14.04 Can't Connect External Monitor

I install ubuntu 14.04, after that my cursor blinking and sometimes it's gone, so i search how to remove it and i found a solution that offer me to delete the unknown display from my terminal, so i ...
0
votes
0answers
12 views

Triple Monitor Wont´t Work

Triple Monitor Setup https://youtu.be/AaNNW9SfdZY There is a video of my error. Because i have 3 Monitors. A Laptop and 2 Monitors. And with 2 Monitors it works just fine
0
votes
0answers
82 views

mdadm monitoring script after boot

the mdadm monitoring program is not working after boot. When i kill the process afterwards and run mdadm --monitor --scan again, everything is ok and the script runs on failures. Here ist my mdadm....