Questions tagged [display]
Questions regarding the display(s) attached to a unix or linux machine, the DISPLAY environment setting, the ImageMagick display tool or (along with X11 tag) remote display redirection
657
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AwesomeWM, Proper Configuration with Multiple Monitors - Cloning, Activating Additional Monitors without Logging out, vertical display, monitor order
I have four related questions regarding the use of the window manager AwesomeWM when multiple monitors are involved. These are all fairly simple configuration questions, but I have not been able to ...
- 101
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16
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Mirroring two displays with different native resolutions
I have a 1920x1200 monitor connected using DVI and a FullHD television connected using HDMI. My video card is NVIDIA GK208B [GeForce GT 710]. I am running Linux Mint 21.
I would like to have a ...
- 175
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7
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Monitor intermittently fails to detect signal
Recent build of a:
Gigabyte B550i Aorus running bios version F15
Ryzen 5600x
Nvidia GTX 1650 using nouveau drivers (via HDMI)
Running Fedora 37.
Have noticed that if the screen goes blank whilst the ...
- 35
0
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0
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15
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Thinkpad T470 w/Ubuntu two external displays on usb-c hub
Mi laptop only detects one external display when conected to dock station. Dock station has one display on displayport and another on usb-c with adapter to HDMI. The displayport one is detected only. ...
- 412
21
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2
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Why is Gnome fractional scaling 1.7518248558044434 instead of 1.75?
If I set 175% scaling in Gnome Settings, the value is saved as 1.7518248558044434 in ~/.config/monitors.xml:
<monitors version="2">
<configuration>
<logicalmonitor>
...
- 1,083
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0
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14
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How to simple record the full application window like obs does in ffmpeg / other programs?
In obs there is a feature capture window feature that can record the application in full without cutting parts, I have read the ffmpeg instructions but it is not easy what I want is simple how can ...
- 23
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47
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External monitors not detected on Ubuntu
I recently was messing around with creating virtual monitors with this script and streaming them to my ipad to extend my display. I was successful in this, but I later found that afterwards I was ...
- 101
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1
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25
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Second monitor without signal on Debian
Recently, I had a problem with my Linux Mint installation and decided to install Debian 11 Stable with the nonfree drivers, and everything is working well so far, except for my second monitor, which ...
0
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1
answer
14
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openbox: change brightness or contrast or saturation only for given window / application
I can adjust brightness or gamma of my whole screen with xrandr.
But is it possible to only change these settings for given window in `openbox?
For instance, if my browser is too bright and I want to ...
- 333
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45
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Linux support 2 monitors 2560x1440
So far I've been using Windows 10 Lenovo T590 with Dell USB-C docking station supporting 2 screens each of 2K resolution (2560x1440) without any issue at all.
After I decided to migrate to Ubuntu ...
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2
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16
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Adding an LCD to Device Tree
I am attempting to define panel-info and display-timings for my SHARP Parallel 24bit LCD Screen within the Device Tree of my Beaglebone Black Debian Image. To do this I am using an overlay .dtbo file. ...
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33
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Red terminal text on dark background hard to see on monitor
Question: how to make red terminal text on dark background NOT hard to see on my monitor?
I have an LG 43UD79-B 4K IPS Monitor. I connect both my Macbook Pro and a Ubuntu Desktop PC (via HDMI) to it. ...
- 250
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0
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56
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xrandr preservation
I don't know why. I don't know how. But my xrandr is really screwed up. I thought I finally found a graphics driver that wasn't bugged to all heck, but no. It can get seriously bugged.
So a background....
- 53
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1
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How is DISPLAY variable defined for X access on WSL?
My WSL defines the DISPLAY variable for x windows on the .profile, checking the IPs I have on the resolv.conf.
Why ? If I am not wrong, resolv.conf is only used for define the DNS to use, and the ...
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1
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How to configure "cvt" properly?
I'm trying to add a new resolution to my screen by:
cvt 1920 980 60
which produces
# 1920x980 59.92 Hz (CVT) hsync: 60.94 kHz; pclk: 156.00 MHz
Modeline "1920x980_60.00" 156.00 1920 ...
- 1
0
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0
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29
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Mirroring a Linux Machine Onto a Linux Laptop (via HDMi cable)?
I have an old Linux laptop I'd like to repurpose as a mirror of my main Linux Desktop.
Basically, it'd be nice to
Plug an HDMi cable from my main machine into my laptop.
The laptop then mirrors my ...
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0
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479
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"No X11 DISPLAY variable was set [...]" when using java.swing
When I'm trying to run a Java GUI application from the command line, I get:
Exception in thread "main" java.awt.HeadlessException:
"No X11 DISPLAY variable was set,
or no headful ...
0
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0
answers
75
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Arch linux: My display driver chip keeps bricking
I use arch-thinkpad 6.1.7-arch1-1 on Lenovo x390 yoga with Intel WhiskeyLake-U GT2 [UHD Graphics 620]. I also use i3wm on xorg. Something like every two days my built-in screen display goes black ...
- 1,103
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42
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How to start MATLAB via bash script in Ubuntu 20.04 LTS with arguments and DISPLAY environment variable?
On a single machine, I have a PHP script that uses exec to call a bash script, AQuA_WBSv_Instance_Spool.sh, as user 'matlab_executor' and does not wait for a return:
exec('bash -c "exec nohup ...
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1
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1
answer
151
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How to open GUI from systemd service on startup?
I'm trying to start a VMWare Workstation VM from the command line. I can do this under my user (not root) by running the following
/usr/bin/vmplayer /home/myUser/vmware/myVm.vmx
Now, I want to set ...
- 123
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1
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253
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Ubuntu 22.10 External monitor connection issue
I have recently install 22.10 Ubuntu OS and I lost external monitor connectivity. I have tried few things but stuck.
OS: Ubuntu 22.10
xrandr:
HDMI-1-1 disconnected (normal left inverted right x axis y ...
- 101
1
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0
answers
21
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Remote Desktop (to Linux) Display Issues
I'm using Windows Remote Desktop to connect to a Linux server. Both the Remote Desktop client and "xrandr" on the server specify a 1920x1080 resolution. However, some display setting is ...
- 11
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59
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Unable to achieve 4k@60Hz with proper hardware
I am trying to get my external monitor (LG 27UL550-W) to work on 4k@60Hz with my Laptop (Lenovo ThinkPad E480 running Linux) using a USB-C dock via an HDMI Cable.
4k@60Hz works when using the same ...
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1
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0
answers
58
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Steam game not launching on primary display
This is going to drive me crazy. I am having immense issues getting New Worlds to a. Open on the Correct monitor, and b. Run at the correct resolution.
I have 3 monitors, setup using xrandr (Arch, i3)....
- 55
10
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2
answers
734
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How can I get the number bytes to write per row for FrameBuffer?
Goal: I'm writing a very simple image viewer for framebuffer /dev/fb0 (something like fbi).
Current state:
My software takes the pixel resolution from /sys/class/graphics/fb0/virtual_size (such as ...
- 460
3
votes
1
answer
507
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xrandr: change saturation (less color, more black/white)
I know how to change brightness and gamma with xrandr:
xrandr --output eDP1 --brightness 0.8 --gamma "0.90:0.85:0.80"
but how can I change saturation, ie decrease the amount of color and ...
- 333
0
votes
1
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147
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KDE Plasma not detecting external display
Whenever I connect to an external display on Arch Linux, it doesn't display anything. While the HDMI cable is plugged into my laptop and I run xrandr -q, I get the following output:
Screen 0: minimum ...
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0
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73
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External monitor does not show the boot process after Grub menu selection!
I have a new Thinkpad T14s laptop with a Thinkpad USB Type-C docking station (LDA-KP) running Fedora (version 36 then upgraded to 37)
It seems that this new laptop or model of docking station doesn't ...
- 121
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0
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34
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xrandr scaling eDP 2880x1800 with DP0 1920x1080
My main monitor is a laptop, having 2880x1800, my 2nd monitor is 1920x1080.
My problem is, that i can't adjust the scaling of the 2nd monitor.
Im running latest KDE neon 5.26 with Plasma.
Going into ...
1
vote
1
answer
78
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Universal way of setting display resolution from a Linux application
I want to set the display resolution before starting a fullscreen window on Linux and I want to do it from inside the application.
The problem is, that I am looking for a universal way to do so, but ...
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3
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0
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26
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How to force screen to be white, irrespective of tty, DE, etc
I'm trying to create a completely flickerless boot and login with Xorg, and I'm particularly interested in the time between the bootsplash (I use Plymouth) and Xorg being fully loaded (i.e. after the ...
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0
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59
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Celeron J4105, screen flickering after reboot
I have a Dell Wyse 5070, with a Celeron J4105 CPU.
I have installed a Debian Bullseye distribution, kernel 5.10, and screen flickers after reboot. There is no error message from the kernel.
On cold ...
- 133
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0
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31
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Xlib. DisplayWidth does not update as screen resolution does
DisplayWidth(Display, DefaultScreen(Display)) does not change its return value even when the monitor changes. I am in a VM and as I resize the monitor, the DisplayWidth and DisplayHeight remains the ...
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1
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Technical reason why Gnome's fracional scaling is limited to multiple of 1/4?
I can understand why 100%, 200%, 300%... scalings are technically easier. But when it comes to fractional scaling, why is it limited to 125%, 150%, and 175%? Is it more difficult to implement, for ...
- 1,083
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1
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284
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Increase icon scaling on xfce4 desktop
I have this virtual machine using the xfce4 desktop for my schooling. I have a 3840 x 2160 display which the virtual machine decides that it will make everything tiny when I use this display. I use ...
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0
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1
answer
273
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Unable to init displaylink service for HDMI adapter
I am trying to get a USB 3.0 to HDMI adapter to work that supports displaylink drivers in archlinux with Xorg server, doing:
I have installed evdi for the in development kernel module.
I have ...
- 1,086
2
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0
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10
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Creating alternate keyboard shortcut substituting laptop Fn keys for switching to external monitors
Currently, I am using Fedora 36 on my Zenbook, with an external monitor connected via HDMI. My laptop has an Fn key for switching among various display configurations, i.e. display 0, display 1, both,...
- 121
2
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0
answers
32
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Screen issue when using vim
When I launch vim in a window of gnu screen, it shows the file as if I had inserted two 'z's at the initial cursor position, but the file is in fact correct and these 'z's just get over written the ...
- 655
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65
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Can't open display on AWS Linux 2
I'm new to AWS and Linux, and I'm having trouble opening up xeyes (or anything else) on the GUI.
I've tried setting
$DISPLAY=:0.0, =:1
and the result from running
env | grep SSH
and taking the IP ...
- 1
0
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0
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84
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Screen randomly wakes up after screensaver was set using xset
Whenever I use xset to set my screensaver, my display turns back on for no reason at all even though I never touched my computer again.
I've tried the following options with xset
$ xset s blank
$ xset ...
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147
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4k 144 Hz monitors never get signal again after turning off
Problem Description
I recently got some 4k 144 Hz monitors, and they perform great when they do work. The problem is, whenever I turn them off via the monitors' power buttons, or whenever they go ...
- 11
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0
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82
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Outline on ubuntu server
I am trying to install Outline manager on a VPS. I installed ubuntu server mini 22.04 on it and I downloaded all the dependecies. When I tried to run it as an appimage file, as it is a GUI application ...
- 111
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0
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321
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How to avoid KDE disabling external monitor on suspend?
I noticed that when I suspend my laptop running KDE, the external monitor gets marked as disabled in the settings. I need to enable it after resuming the system (in system settings for displays). How ...
- 5,667
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0
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278
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vnc: `Error: cannot open display: :1` when I run commands when `sudo`
I am logged into a VNC session, and everything seems to work, except the following. While running commands that launch a GUI (like firefox or an installer I am trying run) they work. I need to run the ...
0
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2
answers
2k
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Monitor detected but with no signal in Linux Mint and Ubuntu
I have a Slimbook laptop with an external monitor (HP Elitedisplay E243) connected to it using HDMI. Suddenly, the monitor stopped working (it was at a system start). The monitor gets detected by the ...
- 113
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219
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Laptop screen won't turn on unless I plug in external monitors (Ubuntu / NVIDIA)
When I installed my Ubuntu 20.04.4 LTS I had it connected to 2 external monitors (at the time of installation). Now every time I reboot my computer, my laptop screen is off. I need to connect it to my ...
- 1,111
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0
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36
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Xrandr output one more pixel offscreen vertical
Long story short i am stretching a 2048x1536 output on a 2560x1600 monitor (sometimes) for accessibility issues for an old app
#I either run
xrandr --output eDP-1 --mode 2560x1600
#or
xrandr --output ...
- 1
0
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0
answers
223
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Update broke my external display settings - Kali
I made the mistake of thinking that Kali can safely be upgraded with "apt upgrade". Clearly it can not! After reboot my external display looked like an old VGA monitor.
I have googled this a ...
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2
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0
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113
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X11VNC Create X Server On N Display
I want to create a X11 display with X11VNC on specific display without resorting to -env X11VNC_CREATE_STARTING_DISPLAY_NUMBER=31, rather I want to specify N display and have it created appropriately. ...
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1
vote
0
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17
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Lubuntu 22.04 - catch monitor state
Is it possibile in linux (lubuntu 20+) catch if a monitor is in "NO SIGNAL" state and doesn't show gui?
When I connect to a remote desktop pc via VNC, all seems good, but monitor is in "...
- 51