Questions tagged [display]

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

2,115 questions with no upvoted or accepted answers
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Ubuntu 22.04 only blanks, but does not turn off screen

Recently upgraded to Ubuntu 22.04, and it seems like the power-saving feature does not actually turn off the screen(s) after X minutes, but just blanks them. When I manually run xset dpms force off, ...
Florian Echtler's user avatar
8 votes
1 answer
13k views

sudo xrandr --addmode LVDS1 1976x1080_60.00 X Error of failed request: BadMatch (invalid parameter attributes)

When I try to change resolution this comes: $ sudo xrandr --addmode LVDS1 1976x1080_60.00 X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 140 (...
Ayush Garg's user avatar
7 votes
0 answers
2k views

Wrong external screen resolution after wake up from sleep

After the Ubuntu distro upgrade (upgrade from LTS 20.04 to LTS 22.04, running KDE) I started experiencing a problem with external screen resolution after the wake up from sleep. The monitor resolution ...
miro's user avatar
  • 71
7 votes
1 answer
1k views

Ubuntu 22.04 / Modify Power Saver Behavior (Do Not Dim Screen)

First of all, I think it's really cool that Ubuntu 22.04 (I upgraded from 20.04, the last LTS version) now has the ability to switch between different profiles. Depending on what I do, I have times ...
Markus Gratis's user avatar
7 votes
0 answers
827 views

Old LG screen/tv no signal on HDMI

When I run xrandr when the screen is off I can see the HDMI port "connected" with all the screen resolutions options fine. However, when I turn the screen on, I just get a blank screen and when i run ...
rtp's user avatar
  • 121
7 votes
1 answer
2k views

How do I change display scaling dynamically?

I have two monitors on my system, a 4k monitor (built-in) and a 1080p monitor (external). Obviously, this causes some issues with scaling due to the fact that windows often have weird sizes and are ...
Kaz Wolfe's user avatar
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7 votes
0 answers
804 views

Cannot Get Xdmx to work with two Ubuntu Computers (xinit error)

I have two computers running Ubuntu 16.04 with Unity, and I'd really like to use the distributed multihead (Xdmx) software in order to use one of the computers as a second monitor, instead of just ...
Carter's user avatar
  • 171
7 votes
1 answer
4k views

Scaling with a 4k monitor and 2k monitor

I'm currently using two 2k monitors and a third 4k monitor. Is there any way to use max resolution on all of them and scale things up a bit on just the 4k monitor? I've been digging around for ages ...
rinu's user avatar
  • 233
7 votes
0 answers
763 views

How to get native resolution of a monitor?

My Ubuntu installation seems to have magically guessed my monitor's native resolution (it's the mode it's set to on startup). Unlike most, my monitor's native resolution is NOT its highest resolution,...
NmdMystery's user avatar
7 votes
1 answer
5k views

Different text scaling factors for different displays?

I just purchased a new laptop, which has a much higher DPI than my prior one did; in fact, its resolution (in a 14" form) is roughly the same as that of my 23" second monitor. I'd like the text on ...
cemerick's user avatar
  • 171
7 votes
1 answer
2k views

Add asymmetrical margin on LCD display?

My old laptop display is starting to break, and I have many dead pixels and other physical issues on the left side of the screen only. Of course I should get a new monitor (or ideally a new laptop), ...
Drew Levitt's user avatar
6 votes
0 answers
5k views

Ubuntu 22.04 LTS unable to setup second monitor

Upon fresh installing Ubuntu 22.04 today, I came across a problem that my main monitor that I want to use (ASUS ROG PG278Q 2k 144Hz Display port) is not being detected. Meanwhile my second monitor(...
ubuntucroq's user avatar
6 votes
0 answers
487 views

Multimonitor display settings reset after one display is turned off

Setup: I have two monitors connected to my GPU, one using DisplayPort, and one using a HDMI to DVI cable. The DisplayPort one is my main monitor. I am using Ubuntu 19.04 with Nvidia driver 418 on a ...
Olaf's user avatar
  • 161
6 votes
0 answers
2k views

Automatically rescale Google Chrome between different monitors

My laptop has a 4K monitor, while my external display is only 1920x1080. When I'm connected to the external monitor and I open Chrome it looks Ok. However, when I switch off the external monitor and ...
yuranos's user avatar
  • 720
6 votes
0 answers
11k views

Error: cannot open display firefox in linux

When I run firefox in bash, I am facing this : Error: cannot open display or Error: GDK_BACKEND does not match available displays I installed xauth , xorg etc. But did not resolve my problem. I try ...
Enes I.'s user avatar
  • 61
6 votes
1 answer
1k views

Monodevelop on (G)Ubuntu: Bad scaling on HiDPI Display

I am trying out to use MonoDevelop on a Dell XPS 13 (13 inch screen with 3200x1800 resolution). I have set the window scaling property in the gnome tweak tool to "2" and most applications behave ...
Patrick's user avatar
  • 188
6 votes
0 answers
1k views

Unplugging HDMI cable doesn't switch back to single monitor mode on Lenovo Yoga 3 11 laptop

I have a Lenovo Yoga 3 11 laptop with Ubuntu 15.04. When I plug the HDMI cable to my external monitor, the system goes into multi-monitor mode so I can use the laptop display and the external monitor ...
nLinked's user avatar
  • 3,347
6 votes
1 answer
2k views

icon scaling seems to work partially on a dell 4k display. I'm using ubuntu 14.04

a newbie here. I'm using a dell 4k display on ubuntu 14.04(up-to-date so far). I have already followed the instructions on this link - Adapt Ubuntu to a high-DPI resolution screen - it struck me ...
Shinhyung Yang's user avatar
6 votes
5 answers
12k views

Screen turns off while watching video (VLC player & SM player)

I'm on ubuntu 12.04 and I've already read similar questions and answers regarding this issue but none of them reported the same problem as I have. The problem is that the screen turns off after 10 ...
s.sufi's user avatar
  • 91
6 votes
1 answer
11k views

How can I mirror my iPhone to Ubuntu 16.04?

How can I mirror my iPhone to Ubuntu 16.04? I have an iPhone 5 and I just want to mirror its screen on my monitor. Is there currently any way to do that? I would prefer a native solution instead of a ...
Gary Willoughby's user avatar
6 votes
3 answers
5k views

After upgrading from13.10 to 14.04 screen on a laptop doesn't work but

First my laptop CPU/GPU is Intel Celeron N2815 (Bay Trail) and I am in dual boot with windows 8. I have upgraded from ubuntu 13.10 to 14.04 today through update manager. And after upgrading and after ...
Mlinko's user avatar
  • 85
5 votes
0 answers
124 views

Set Large Text from Accessibility for only one screen

I am using ubuntu-22.10 with Wayland. I am facing issues setting the display settings of my laptop and monitors. I am using two external monitors and my laptop display. Their highest resolution is as ...
Ankit Koirala's user avatar
5 votes
0 answers
5k views

Ubuntu 22.04 LTS (Jammy Jellyfish) does not detect higher refresh rates on external monitors

Premise: like many other users, I have also encountered the following issue which has already been documented here: Can't use Wayland with Nvidia 510 drivers on Ubuntu 22.04 LTS although I am ...
Nethereal Laplace's user avatar
5 votes
0 answers
3k views

Automatic KDE Plasma scaling based on monitor in use

I'm a total Linux noobie, and would appreciate some pointers as to, hopefully, setting up automatic scaling of KDE Plasma based on the resolution of the monitor in use. I've managed to install a fully ...
Cloudspine's user avatar
5 votes
0 answers
541 views

How to set fractional scaling to 110%

I am on Ubuntu 20.04. Fractional display scaling of 125% is too big for me and 100% is too small for me. Is it possible to set it to 110%? I couldn't find an option anywhere.
Pongal's user avatar
  • 51
5 votes
2 answers
525 views

Is it possible to have two monitors with different scales?

I have currently two monitors : Screen 0: minimum 8 x 8, current 6400 x 2160, maximum 32767 x 32767 DP-2 connected primary 3840x2160+2560+0 (normal left inverted right x axis y axis) 600mm x 340mm ...
Dimitri Danilov's user avatar
5 votes
0 answers
251 views

Bug using two Monitors with different resolution

I have a very confusing problem. I'm using Ubuntu 18.04 with 2 monitors My main monitor (15.6") has a resolution of 1920x1080 and my second one is 28" with a 4k resolution. When I'm using my two ...
freddie92's user avatar
5 votes
0 answers
3k views

How to use pyshical display when it connected instead of dummy display driver on Ubuntu 18.04

I have Intel NUC with Ubuntu 18.04 which operates as server the most time. Sometimes SSH is not enough and I need to control it using Team Viewer. This is why I installed and set up xserver-xorg-video-...
dmitry1100's user avatar
5 votes
0 answers
2k views

Black screen on detected second display on Ubuntu 18.04

I recently updated my laptop to Ubuntu 18.04 from 16.04. When I tried to use my external monitor with it for the first time, everything worked well and I set the external monitor as the primary ...
user3738870's user avatar
5 votes
0 answers
478 views

How to show opened windows in current display with ALT +TAB switcher in Ubuntu?

I am using Ubuntu 16.04, using multiple monitors, when I use ALT+TAB to switch between applications, all the windows in all monitors are coming up and it's confusing me. Can anyone know how to show ...
Lokesh Sanapalli's user avatar
5 votes
0 answers
758 views

enable sticky edges in GNOME

I installed gnome-shell and ubuntu-gnome-desktop on an existing lubuntu installation. Is it possible, on GNOME shell, to enable sticky edges, as on Unity, for multiple displays?
Edgy1's user avatar
  • 537
5 votes
1 answer
348 views

Screen goes black only when clicking system settings. Comes back on after 10 to 60 seconds

I am new to Ubuntu. I just installed a fresh copy of 16.04 LTS on a Lenovo M8 3306 ThinkCentre desktop. It is running great so far other than one weird problem in which I cannot find anyone else on ...
networknoob's user avatar
5 votes
0 answers
13k views

Can't change resolution: “xrandr: Configure crtc 0 failed”

I connect to a Ubuntu host using TeamViewer. It's resolution is currently 800x600. I would like to change it's resolution to 1024x768, but I get this error: xrandr: Configure crtc 0 failed The ...
Iter Ator's user avatar
  • 124
5 votes
0 answers
2k views

XRandr GUI that supports Transform?

I'm trying to correct for keystone distortion using a small Ubuntu/Debian box and a projector. The intended effect is for the desktop to be distorted in a fashion similar to this: This can be ...
Taconut's user avatar
  • 151
5 votes
2 answers
6k views

How to fix the physical size of a display in xrandr?

In a nutshell, my problem is that my TV is overscanning and I have nothing like a "Screen Fit" option in the TV. The TV is a Samsung model LN32R71B that I believe is providing a corrupted EDID file, ...
Alessander Botti Benevides's user avatar
5 votes
1 answer
1k views

Dual displays not working properly, getting only low resolution

My hardware: I just installed Ubuntu 12.04.2 LTS (Precise Pangolin) and I have been unable to get my dual 1920x1080 monitors working properly with my GeForce GTX 670 FTW. The problem: Whenever I get ...
James Arreola's user avatar
5 votes
2 answers
3k views

Distorted graphics on start up

So I am using dual monitors and every time I boot up my machine after entering my password to login, both screens show distorted graphics which eventually go away. I am on Ubuntu 12.10 the OS type is ...
Etienne Lawlor's user avatar
4 votes
0 answers
2k views

Second monitor is not detected after update on Ubuntu 22.04

I have Ubuntu 22.04 on my laptop Lenovo Ideapad 320 and a second monitor connected. And at first, everything worked fine. Unfortunately after the last update (I believe it included kernel update) and ...
kosemMG's user avatar
  • 41
4 votes
0 answers
2k views

Ubuntu Desktop on Rpi 4 8GB no display after boot

So I used the regular raspberry-pi-imager tool for windows and flashed the "Ubuntu Desktop 21.10 (RPi 4/400)" on my brand new raspberry pi 4 8GB ram model. During the boot, the regular RGB ...
Tejas A M's user avatar
4 votes
1 answer
1k views

Black screen after kernel upgrade to 5.11.0-25-generic

I'm using 3 monitors 1920x1080 (laptop and two external) on Ubuntu 21.04. After kernel upgrade from 5.11.0-18-generic to 5.11.0-25-generic the built-in monitor started to show only a black screen, ...
Алексей Квитун's user avatar
4 votes
0 answers
5k views

Set resolution 2560x1080 Wayland update 21.04

I recently updated from Ubuntu 20.04 Groovy Gorilla to Ubuntu 21.04 hirsute. With 20.04 I was able to set the custom resolution of my LG ULTRAWIDE monitor to 2560x1080 using xrandr because my session ...
G Dube's user avatar
  • 165
4 votes
0 answers
271 views

display scaling keeps reverting

I am running ubuntu 20.04 on a virtual machine and whenever I resume my host computer from sleep the display scaling factor gets reset to 100% (I want it at 200%) there's an old similar question ...
AntiMatterDynamite's user avatar
4 votes
0 answers
505 views

Night light is not working

I'm on Ubuntu 20.04 and my night light recently stopped working. I did no changes whatsoever, it just stopped working. What could be a possible fix?
Gatxy's user avatar
  • 121
4 votes
1 answer
3k views

Inconsistent Resolution / Positions / Fractional Scaling for 4K Display & HD Display Using NVIDIA Drivers

Inconsistent Resolution / Positions / Fractional Scaling for 4K Display & HD Display Using NVIDIA Drivers Background So, I've recently moved back onto Ubuntu after deciding to take a break from ...
James Wharton's user avatar
4 votes
0 answers
2k views

Second HDMI monitor not recognised in Ubuntu 20.04

I recently updated to Ubuntu 20.04, only to find that my second external HDMI-connected monitor is not recognised in this new OS version. My machine is a Lenovo G510 essential, with no NVIDIA GPU (so ...
ferles's user avatar
  • 41
4 votes
0 answers
1k views

Ubuntu 18.04 `$DISPLAY` is set to `127.0.0.53` instead of `:0`

I have a freshly installed Ubuntu 18.04 on a Lenovo T470 I ran into some weird issues, which seemed to be related to rendering of GUI windows on my machine: Some code not running correctly and ...
user475680's user avatar
4 votes
0 answers
758 views

Color calibration greyed out in Ubuntu 19.10?

I'm using an external display with my Asus Vivobook which has an inbuilt display of 1920*1080 resolution. Now, unlike Windows 10 where I could calibrate the inbuilt display by going to Intel graphics ...
Shiv_90's user avatar
  • 274
4 votes
0 answers
2k views

External monitor flickering with usb-c dock displayport / vga

Hardware: lenovo thinkpad e480 laptop (intel+amd hybrid graphics) + lenovo thinkpad usb-c dock + dell u2415 monitor. Bios / dock firmware: latest versions installed If external monitor is connected ...
Jakob Zweiblumen's user avatar
4 votes
1 answer
952 views

Laptop running Ubuntu 18.04 and Nvidia GPU does not detect HDMI display

My laptop comes with lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 01:00.0 VGA compatible controller: NVIDIA Corporation ...
user2066480's user avatar
4 votes
0 answers
4k views

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 ...
rok's user avatar
  • 935

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