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Questions tagged [display]

Questions related to hardware displays, either internal (as in a laptop) or external (as in most desktop monitors, or projectors)

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How to connect Ubuntu 16.04 Workstation to Samsung Smart TV through Screen Mirroring?

Is there an equivalent Linux/Ubuntu procedure to the screen mirroring procedure described in this video for a Samsung Smart TV with Windows10?
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Second Screen resolution not availailable

I am trying to set the resolution for my secondary screens. I have a ThinkPad laptop with two additional monitors. The laptop an the left monitor show 1920x1080 resolution, while on the second ...
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Getting error Gtk-WARNING **: cannot open display: when trying to SSH to my server

Bit of ubuntu noob but I'm trying to run a code off github on a server remotely using SSH, and the code stops at this Gtk-WARNING **: cannot open display: How to solve this error? I don't think I can ...
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xrandr not showing all ports and resolutions

I recently installed a new Nvidia driver, 390.87 for my Ubuntu 18.04 LTS machine. Now, I can't connect external monitors over DP anymore - they're just not recognized and stay dark. xrandr doesn't ...
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1answer
8 views

Display Problems Basic Apps

i am running an Ubuntu 18.04.1 with all Packages up to Date. At the moment i have trouble Displaying some Programms such as gdit and calc. In Gedit the background should be white, but it is somehow ...
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1answer
48 views

How to display/extend/mirror/cast Ubuntu 16.04 screen to a Samsung Smart TV that is connected to the same network?

How can I share/display what I am seeing on my Ubuntu system to a networked Samsung Smart TV? The Ubuntu system and Samsung Smart TV are LAN connected to the same network. The Ubuntu system is a ...
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16 views

How can I roll back my xrandr settings?

I am running Linux mint 18 with a NVIDIA GeForce GT 610 GPU with my desktop spread across two screens. The other day I connected a third screen which worked fine to spread the desktop over all 3 ...
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21 views

Second Monitor not Displaying

I was working following a python tutorial using SDL and was running into a problem Could not initialize SDL : No available video device I followed the instruction here and it fixed my problem with ...
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15 views

ubuntu 18.04 logs into a black screen. The desktop appears when I restart my monitor. Any fixes? [on hold]

Suddenly I see a black screen after password login. I have to restart de monitor to see the desktop.
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19 views

How to set different scaling on multi monitor (3 monitors)

I have 3 monitors, the left one is 4k, while the other 2 are 1080p. The problem I am having is that if I have the 1080p monitors on normal scaling, the 4k monitor is basically unusable because ...
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5 views

How could I apply different font size on different screen?

I have two screens with the same resolution 1080p but one is 14-inch while another 23.8-inch, so I would like to apply different font size on them ( for example, 14-pixel in the small screen and 11-...
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21 views

Problems with nouveau and nvidia binary drivers on dell xps 15 9560

I have Dell XPS 15 9560 (touchscreen and 4k display) with dual boot windows and Ubuntu 16.04. If I use the nouveau display driver, then Ubuntu always hangs when I try to shutdown. If I use any of ...
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1answer
38 views

When idle screen blanked with mouse pointer but not turned off [duplicate]

I'm using Ubuntu 18.04. When computer inactive or lock it manually screen becomes black with mouse pointer on it. Actually it looks like is still turned on. I would like to get it turned off for ...
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23 views

HDMI not being read

I had HDMI working few days ago. Just today HDMI failed on me and I am completely oblivious to what to do. I have tried several things but didn't try everything. Both the Screen and the HDMI cable are ...
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0answers
14 views

Extra monitors not detected after replugging in docking station

I am using Lenovo P50 Thinkpad with 2 extra monitors in my office. I am using Ubuntu 16.04 with unity display manager. When I go for meeting, I take my laptop along with me. When I come back and ...
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9 views

Color Managment on two different display monitor

I am using Ubunto 16.04 LTS and I have two identical monitor acer. I want to put the filter color D50 on both of them, but when I go to colors setting there is just one display that working and that ...
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25 views

Ubuntu 18.04 see second monitor but no actual video shows on it

After I updated from 16.04 to 18.04 my dual screen setup has stopped working. I have two monitors, one connected from hdmi and one connected from vga. Both are connected straight from the ...
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7 views

Trouble with display on IMac

I upgraded to the latest Ubuntu (18.04) on my repurposed Imac and I have been having several issues that I have not been able to find answers for as of yet. My screen at times shifts the color palette ...
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26 views

Extended Second Monitor not Detected

I'm about to switch to Ubuntu from windows and when live booting, my second monitor is not detected. My setup includes a monitor connected to a dock using an hdmi cable which is then connected to my ...
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26 views

Dual monitor display problem

First of all, I am new to Ubuntu and a total Linux noob so bare with me ;-) I have two identical monitors, but only one is recognized correctly, the other one fails to show the correct screen ...
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0answers
16 views

Xrandr gone crazy with dual monitor setup

I have a dual monitor setup, on a dual boot computer with Windows 7 and Lubuntu 18.04. This has been working fine the past few months, when I first bought a new second monitor (a Viewsonic XG2401). My ...
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38 views

Display problems with Ubuntu 18.04

I have an issue with a fresh install Ubuntu 18.04. The problem I have is hard to explain maybe this image will explain my problem better than words It's like some weird dead pixels all over my screen,...
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1answer
49 views

White color and yellow color is almost the same on my monitor, what can I do being on Ubuntu 18.04?

I have an old monitor. On Windows, we have Intel or Asus (or you name it) settings for a graphics card that allow configuring color curve. I see that I can install some custom color profile but how ...
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93 views

MSI laptop running Ubuntu 18.04 with Nvidia graphics driver version 410.48 with GeForce 1060 GPU only displays on external screen

I recently restarted my laptop and I am unable to get a display on the built-in monitor of my laptop. All I see is a black screen with an unblinking cursor in the top left corner. I recently installed ...
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2answers
70 views

How do I shrink my monitor's size?

I would like a black, empty margin surrounding my entire screen, effectively turning a 24" monitor into a 20" one instead. My setup: Ubuntu 18.04.1 LTS Intel Graphics Xfce4 (I'd prefer a cross ...
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1answer
102 views

Ubutnu 18.04 - after upgrade - Display/PKCS#7 signature error

After upgrading from 17.10 to 18.04, anytime I try and open ubuntu I am getting the following errors (which are found in my kern.log as well) Sep 28 15:06:12 aram-UX330UAK kernel: [ 15.056052] PKCS#...
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50 views

How to add a custom resolution? xrandr fails

I am well aware that this question has been asked multiple times, but no solution has worked for me. I am using Ubuntu 16.04 I got the modeline with cvt, added a new mode with xrandr --newmode, ...
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2answers
44 views

Use laptop as a second monitor

I've spent far too much time Googling this and haven't been able to find anything. I have a laptop and tower both running Ubuntu. I want to be able to use the laptop as a 2nd display to extend the ...
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25 views

Ubuntu - Work-around broken display

I am on vaccation and my notebook-display broke. The upper 25% of the screen are clearly visable (Thus I can post here).. I recognized that the console (tty1,tty2,...) is almost clear. But But on ...
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1answer
28 views

Two-monitor display loses desktop icons

I run Ubuntu 18.04 on a Macbook Pro. I like to use two monitors in my office, but when I connect the second monitor my desktop icons "disappear". I say that in quotes because they rearrange ...
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1answer
17 views

Two vertical monitors: Connecting to VNC host without any monitors

I have two vertical monitors that I want to use to connect to a remote computer without any monitors. Both the remote computer and my local computer are located on the same desk, in hands' reach. Both ...
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0answers
16 views

xhost settings at boot not working

I am trying to display images on boot from my device, but it throws feh ERROR: Can't open X display. It *is* running, yeah? After some findings, I got to know that some xhost settings need to be ...
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1answer
23 views

Sharp rectangular corners in some windows

Screenshot - 1: Screenshot - 2: After a recent system update, a few of the windows ( specific apps like files, settings ) in ubuntu-18 tend to have rectangular corners. Tried resetting gnome ...
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1answer
161 views

From a remote SSH session, how can I get the screen resolution of the physically connected monitor?

I'm running Ubuntu 18.04.1 LTS Desktop. I'm connecting to the desktop via remote SSH session. I'm trying to get the current resolution for the currently active local session. I found these ...
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27 views

Ubuntu Budgie 18.04.1 - Controls dissapeared when on docking station

Just installed Ubuntu Budgie 18.04.1. When connecting to the TV using docking station the controls (top bar and plank) are gone. Background, mouse and keyboard are OK. This is Dell Latitude e5440. ...
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8 views

Text scale Ubuntu 18.04.1 Dell XPS13 9360 [duplicate]

I have just installed Ubuntu on my Dell XPS 13 9360 and I am encountering a problem. The scaling of the screen seems "off". I have a 1080p monitor, all text and button on the screen are really small ...
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2answers
48 views

Installing on a laptop with a broken screen - how can I duplicate the display to an external monitor rather than extending it before installation?

I am trying to install Ubuntu on my laptop which has a broken LCD. I've plugged it into a monitor via HDMI but it is extending my screen instead of duplicating it, leading to the install icon being ...
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How to diagnose an intermittent issue with what I assume is my display driver? (Only occurs since 18.04)

I have a minimal Ubuntu 18.04 installation on a ThinkPad X240 with an AOC monitor plugged in via Mini DV (laptop) to HDMI (monitor) cable. When turning the laptop on 1 out of 2 times it looks like in ...
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74 views

Ubuntu 18.04LTS No display on TV or laptop, connected by HDMI

With previous versions of Ubuntu (I think 14.10 was the last one I had used until very recently) I remember having to select "mirror screen" and also change audio output to play stuff on my tv screen. ...
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87 views

Low resolution on display-port USB-C external monitor - “Unknown Display”

I'm using a Dell XPS 9570 running Ubuntu 18.04 (with the Windows install intact). When I plug in an external monitor, in this case a 1440p Asus Rog, it appears in Screen Displays as Unknown Display. ...
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37 views
+50

Adding a fake monitor for headless system breaks boot when a real monitor is connected

I'm trying to add a fake monitor in Ubuntu 16.04. This is a headless system and the problem is that remote desktop like teamviewer are really slow, so I tried the accepted solution here: Add Fake ...
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0answers
10 views

How to get displayed text location (in terms of pixels) on my screen?

I am trying to figure out if it is possible to read different words displayed on computer screen. For example in home folder (in GUI mode), we have Downloads, Documents etc. To display these words, ...
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33 views

Ubuntu Server keeps suspending when external monitor is disconnected

I got Ubuntu server 18.04.1 running on a laptop with a broken display. Obviously, I Used an external monitor for the install Now when I disconnected the external monitor, the server suspends within ...
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0answers
16 views

What in Lubuntu would cause monitor to alternate Analog/Digital and stay in black screen?

I just installed latest stable version of Lubuntu from USB. Tested it first running off the USB and the interface worked but after I installed and restarted as it requested, it defaults to starting ...
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0answers
19 views

Vertical lines and mirror copies on external display

I am using a 2018 XPS 15 with an 8th gen Intel CPU and an Intel iGPU (no Nvidia). This is Ubuntu 18.04 with updated software. Whenever I plug in this external monitor, I get what you see below. I ...
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21 views

Ubuntu update from 16.04 to 18.04 - now the screen isn't connected to the next one

I've got a major problem as I can't get xrandr to set up xrandr --output LCD --panning 1366x2000 to get the screen bigger and I am not able to move a window on bottom line out so that the bottom of it ...
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28 views

External WQHD monitor with NVIDIA NVS 4200M

I got a Lenovo T420s with a dedicated NVS 4200M Graphics Card running Ubuntu 18.04 and want to connect to an external monitor with WQHD resolution. However, when joining displays, the external monitor'...
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41 views

Eyes getting sore and tired

I know this questions have been asked before but, I want to focus on two areas which I think can solve my eyes getting sore and feeling tired all of the time when using Ubuntu. I am using HP ...
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0answers
32 views

Programatically change the display scaling on the fly in Ubuntu 18

The method described here still partly works: Change the display scaling on the fly But it is not the official mechanism anymore and not what the system does under the hood when going to settings->...
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0answers
38 views

display manager issue - Screen/GUI loads layer by layer in ubuntu 16.04 LTS

Recently I got notification from software updater that update is available and instead of using apt-get upgrade I just updated from software updater, after reboot the screen was flickering ...