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

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Failed to start Light Display Manager, stuck on black screen

I have been using Linux Mint for about a month. Today, I turned on my computer and first I got this error after the Linux Mint logo appeared. UBSAN: array-index-out.of-bounds in /var/lib/dkms/...
Ayrton Fidel Avalos Cuadrado's user avatar
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How can I split my screen in half and mirror the image?

I'm trying to split my monitor in half and mirror the image on each half. So far I tried following instructions from this website but haven't got any luck with it. I actually managed to split my ...
chyxo's user avatar
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lower resolution maintaining aspect ration with center feeting

I wanted to acheive something like what was implemented in Windows. Lower resolution of the display, without stretching, that is centered display, which was shown on the first image on Windows. But ...
Anwar's user avatar
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Please Help Dual GPU Graphics Drivers Debian 12

I have decided to switch over to Linux after years of using Windows. I have a 6 monitor set up paired with a 3090 and RX 5700 XT, the only reason I use the XT is because the 3090 only supports up to 4 ...
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Can’t set up 4K resolution on new PC after cloning Linux Kubuntu SSD from laptop with Clonezilla

SOLVED! THE REAL PROBLEM WAS MY HARDWARE: I tried running Kubuntu in a live environment through my USB and I had the same problem (and in the windows setup then as well, but I didn't notice). After ...
TensorWizard's user avatar
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Custom Display Resolution Nvidia driver Pop!_OS 22.04 LTS

I'm trying to set a custom resolution for my primary display, one that the monitor doesn't advertise as available. On Windows I could set a custom resolution in the NVIDIA Control Panel, and then ...
ellitedev's user avatar
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How to extend laptop to multiple monitor in linux?

I have Asus ROG Strix G15 laptop running Pop_OS and 2 FHD monitors, i want to extend (not mirroring) the display to those 2 monitors. What can i do to make it like the following: To make it so the ...
Noober's user avatar
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KDE Plasma Wayland cursor is malfunctioning

This is a fresh install of Kali Linux in a virtual machine following a package update & upgrade. I selected Wayland KDE plasma as my DE when I was setting it up. If this changes anything, my ...
xMechanica's user avatar
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Command that spits out exact display mode used? (Including DSC, chroma subsampling, etc.)

Are there any commands out there that will tell me something like: Current display mode: 3840x2160, 120Hz, 10-bit, YCbCr422 (DSC unsupported) Available display modes: * 3840x2160, 120Hz, 8-bit, RGB444 ...
Archagon's user avatar
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How to prevent my external monitor from turning off when the system is idle

When I'm using my laptop if I don't use it for a while, the laptop's screen goes off and the external monitor turns off by itself. I'm trying to prevent my second monitor from turning off, and I want ...
livan3li's user avatar
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FreeBSD console resolution

I'm trying to get higher resolution on FreeBSD 14 while booting. I'm trying to match the same resolution I run my desktop in, 1280x720. I'm adding this to my /boot/loader.conf: efi_max_resolution=&...
gdonald's user avatar
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Touch screen and external monitor: a ZenBook Duo - like setup?

I am using the Steam Deck as a daily driver since some time and i am pretty happy with it. If someone is not familiar, this is a pretty beefy (for normal tasks) handheld linux PC. I configured SteamOS ...
Wyatt Gillette's user avatar
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Wrong display resolutions with amdgpu drivers

After using EndeavourOS's Arch distro in my laptop, I decided to install the same distro in my main computer. The computer has an AMD RX6600, and I figured out how to install the amdgpu drivers. The ...
andrwondabeat's user avatar
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Display works when U-Boot loads but not with Arch Linux ARM

guys. I installed Arch Linux ARM on my old Allwinner A31s tablet. I can use it via UART/serial console but I can't get the display to work. The tablet turns on, U-Boot loads and shows your submarine ...
fr2z93's user avatar
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Could not open display using Kubernetes service URL

I'm working on launching graphical applications on a k8s cluster. My configuration is the following : In a 1st pod, I running a X-server & a VNC Server spec: containers: - name: test-x-...
Ptiseb's user avatar
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Waydroid installation break config

I have followed the install instructions here : https://docs.waydro.id/usage/install-on-desktops. I use Debian 12 with Gnome 43.6 and X11 on Dell inspiron 15 laptop. After installation I figured out ...
larum's user avatar
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Pop os brightness stuck at maximum

So I've encountered this problem every time I installed linux on my laptop. I've asked it before here, but that didn't go well. Now I'v installed Pop OS (22.04) and I'm fully committed to it, it's not ...
III_phr's user avatar
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Running Linux Mint 20.1: HDMI max is 1920X1080 I want 2560X1440

I was using a DP output from a HP Elite Desk 800 G2:Linux Mint 20.1. My monitor (AOC) was on 2560X1440. It has 2 ports an HDMI and the DP. The DP has failed, the HDMI is good. I confirmed this by ...
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Screen goes blank at 4K 120Hz, when GPU memory clock is <100%

I have the weirdest issue. When I set xrandr to display on my TV at 4K 120Hz, the screen goes blank as soon as anything remotely graphically demanding happens (like switching to overview or moving ...
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How to disable screen stretching in Linux AMDGPU

Kinda new to Linux Gaming stuff and recently I'm running a Kubuntu with AMDGPU and by default the screen stretches on different aspect ratios than my default (21:9). On Windows is easy to change this ...
Brenno Fagundes's user avatar
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My Lenovo Ideapad gaming 3 refresh rate can not be set to 60hz from 120z

I recently installed ubuntu in my Lenovo Ideapad Gaming 3 and I wanted to set the refresh rate to 60hz so that I can save more battery. The option for changing the refresh rate is not offered (nor was ...
sidharth's user avatar
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How to rename connected computer monitors in linux using wayland?

I have two identical computer monitors, both from the same manufacturer, with matching models and revisions. These monitors are connected to a Thunderbolt 4 docking station via DisplayPort, and the ...
Simon Schürg's user avatar
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Why and how is DISPLAY variable set by MobaXterm but not VS code?

I am attempting to transition using the VS Code with the remote plugin for development on Linux VMs. However I am struggling with something related to the DISPLAY variable. Somehow during SSH to ...
shawn1874's user avatar
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modinfo: ERROR: Module udl not found

Error occurs when running modinfo udl Using kernel 6.4.11-arch2-1. In my config I have: CONFIG_DRM_UDL=m # CONFIG_FB_UDL is not set modinfo udlfb returns the same error. This problem arose when ...
Sam's user avatar
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Text Display Problems in Parrot OS

I have a dual-booted Parrot OS with Windows 11. Whenever I run a virtual environment in Parrot, like a Virtual Machine, Instance or Terminal on a browser like Firefox or Tor, I get distorted coloured ...
Qui Gonn Jinn's user avatar
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Application windows content get displayed (upside down !) while session is locked

I recently experienced a very bizarre phenomenon. As I thawed my computer from suspend, I got back to my session manager's lock screen. However, the content of the window of application currently ...
ysalmon's user avatar
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Debian fails to boot on new kernel but runs fine under old kernel, how to troubleshoot?

Following a bump from Bullseye to Bookworm, Debian is unable to boot under its newest kernel. The new kernel 6.1.0-11 does not work at all. After displaying the booting to kernel message, there is no ...
huub553's user avatar
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346 views

How to synchronize the display refresh rate with the video frame rate in mpv on Wayland?

Video content is usually created in 23.976 or 24.000, 24.976 or 25.000 (PAL), 29.970 (NTSC TV) and 59.940 FPS or 60.000 FPS (mainly web video). For even frame-pacing it's vital to adjust the display ...
user598527's user avatar
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Samsung monitor which was advertised to support 4K and 240Hz does not do both at the same time

I recently purchased a Samsung 32" Odyssey Neo G8 4K UHD 240Hz monitor to replace an old one. After explicitly setting the refresh rate to 240Hz on the monitor, I connected it to my Linux desktop ...
dby58693's user avatar
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Console output not aligned on 4k screen

After a fresh Ubuntu Server install, the console (no GUI) output is not aligned to the left side of my 4k screen. Instead, each line starts at a third of the screen width away from the right side, and ...
Ashkan Arabi's user avatar
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163 views

Changing resolution causes black screen

I have a laptop with maximum supported resolution 2560x1440. Whenever I change the resolution, the display turns black. (The 20 second grace period is observed) I'm using openSUSE Tumbleweed. Here are ...
Lily White's user avatar
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Radeon card on computer may is defect after current problems. How to check? sddm not start, card detected but no vram

Radeon card on computer may is defect after current problems. How to check? sddm not start, card detected but no vram My raddeon sapphire has 3 fans. These fans were only turning when had gpu loads to ...
Estatistics's user avatar
2 votes
0 answers
355 views

How to force all new windows to open in primary monitor on GNOME?

I am currently using two monitors side-by-side with my Linux desktop running GNOME. I have been using the Join Displays option to make the most out of my space. As time progressed new windows started ...
wx18568's user avatar
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1 answer
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DISPLAY=:0: Command not found

user@domain:~ $ echo $DISPLAY :0 user@domain:~ $ DISPLAY=:0 DISPLAY=:0: Command not found. Just trying to run the command here: https://stackoverflow.com/questions/46810043/notify-send-doesnt-work-...
ProgrammingFreak's user avatar
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Buildroot and framebuffer

I am very new to embedded programming so please have some understanding if i sound dumb. Recently i have built a linux kernel using buildroot tool. These are the commands i used: make ...
programmer wanna be's user avatar
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61 views

debian bookworm - plugging in ethernet shuts off display

I recently migrated my ASUS thinpc (Ryzen 3 4300U) from bullseye to bookworm. I use a KVM switch (KCEVE 4 Ports KVM Switch) to share my external monitor, mouse and keyboard between this PC and my work ...
Rashmi M P's user avatar
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140 views

How to target all except for one output in sway-output?

I am writing a bash script to disable all monitors except for the main one. My current script is: swaymsg output "*" disable swaymsg output eDP-1 enable pos 0 0 res 3840x2400 But it ...
Victor2748's user avatar
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581 views

Issues with display scaling on second monitor

I have laptop running Linux mint cinnamon which I am trying use with a portable second monitor. The laptop screen is 3840x2160 and the second display is 2560x1600 I am using linux mints in-built "...
Pioneer_11's user avatar
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1 answer
125 views

Software method to unplug/re-plug a DisplayPort cable to re-initialise the connection?

Is there any software way to have the same effect as unplugging/re-plugging a DisplayPort cable without physically doing so? The reason why I want to know is that my Dell monitor's resolution becomes ...
Damn Vegetables's user avatar
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1k views

Is it possible to scale two displays differently?

I am using Ubuntu-based PopOs 22.04 LTS and I have two displays. One is my built-in display which has 2560x1440, and another external monitor has a 1920x1080 resolution. I enabled Fractional scaling, ...
Serdar's user avatar
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228 views

Laptop with MX Linux cannot `xrandr --addmode` 1366x768 after installing NVIDIA driver

What I have An old ASUS P43S laptop. NVIDIA GeForce GT520M video card. HDD. Very outdated. Emerson 32" LCD TV (no model number in the front, software TVNB2064_08_UH_XX91_GB0) connected to its ...
Bolong's user avatar
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Second external monitor does not turn on but is connected

I'm running debian 12 on a thinkpad T14s and have an issue with a second external monitor. I have both monitors connected to the thinkpad universal usb-c docking station and my laptop plugged into ...
kevin41's user avatar
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Can I force my laptop to recognize its HDMI port?

I have an HP Zenbook Power G9 with Ubuntu, which comes with an HDMI port. My issue is that this port does not work. When I plug the cable into it, nothing happens and the extra screen stays black. ...
Michele Bolognini's user avatar
1 vote
1 answer
479 views

Unable to Establish VNC Display on Ubuntu 20.04 Jetson Nano without HDMI Connection. Shows 'DISPLAY' environment variable not set... when i SSH

I have tried the following troubleshooting steps without success: Manually setting the DISPLAY environment variable as both DISPLAY=:1 and DISPLAY="my ip:1". Verifying the display variable ...
Danana's user avatar
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Boot Mint21 with display turned off

Since upgrading from Mint 20 to Mint 21, my Shuttle DH310 mini PC doesn't boot properly if it doesn't have a monitor attached (and turned on). Sometimes I don't need the display because I just want to ...
FumbleFingers's user avatar
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1 answer
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Display Drive on MacBook Running Debian Sid

I'm trying to revive a very old macbook (2011) by installing Debian Sid on it. The install completed fine but on start the system would hang. I eventually got around this by setting nomodeset in grub. ...
shortspider's user avatar
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97 views

"Hello world" to pixels -- everything between OS, driver, and hardware (CPU, GPU, PCIe, USB-C to display)

Can someone explain "Hello World!" in relation to the modern stack of software and hardware on a modern Linux or Unix machine? Doing a $ strace on the binary generated by following ...
codepoet's user avatar
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198 views

Horizontal flipping of display with Wayland

I'm using Ubuntu 23.04 with Wayland. I use 3 extended displays, one being a small screen to be projected on a teleprompter. Is there a way to horizontally mirror/flip a display such that looking at it ...
fmic_'s user avatar
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1 answer
554 views

Dual Monitor - gdm3 uses wrong monitor

I have a dual monitor setup for Debian and my Desktop Environment is GNOME. I set the primary screen to screen 1 in Settings > Displays and it works fine. But my Display Manager gdm3 does not ...
jnr5222's user avatar
2 votes
1 answer
334 views

How to prevent the mouse from waking up the display?

I prefer not having my monitor on at all times (or shutting down manually by pressing its hardware key) and thus the 'screen blank' option* is enabled (Gnome's 'power' settings). Any input wakes the ...
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