Questions tagged [displayport]

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How do I extend the desktop environment to the secondary display?

TLDR: The primary monitor didn't work (connected over displayport) I found I could manually turn it on via nvidia-settings It now works, but doesn't show the desktop environment I can move the mouse ...
-1 votes
0 answers
58 views

DP over USB-C not working on Dell G15 - tried all the suggested solutions

I know this may look like a duplicate but I've followed every single suggestion I found in different questions on AskUbuntu and I still can't get it to work. I've been fighting for over 4 days to get ...
1 vote
3 answers
4k views

Focal - screen flickering, i915 CPU pipe A/B FIFO underrun on Intel HD Graphics with DisplayPort screen

I have my Lenovo ThinkPad X220 connected to an Acer VG0 27" 1440p screen via DisplayPort. Periodically, the screen flicks off for several seconds. Usually it comes back, but occasionally it will ...
0 votes
0 answers
68 views

Displayport to HDMI Converter Issue: Second Monitor No Signal after BIOS on AMD Ryzen 5 4600G Dual Monitor Setup

I have a dual monitor setup with an AMD Ryzen 5 4600G (Radeon Graphics) CPU. My motherboard has one DisplayPort and one HDMI port. I connected Monitor 1 to the HDMI port and Monitor 2 to the ...
1 vote
0 answers
336 views

Second monitor prevents booting on 20.04 (onboard graphics)

I am running an (almost) fresh install of Kubuntu 20.04, all latest updates applied. I completed the process on an HDMI monitor that was plugged into the motherboard (a ROG STRIX B560-F GAMING WIFI). ...
0 votes
1 answer
144 views

How to choose which video output to use?

I installed Ubuntu 22.04 on a computer that has a Display Port output and an HDMI output. Both outputs belong to the integrated graphic card. By default the image only comes out of the Display Port, ...
0 votes
0 answers
580 views

Ubuntu 23.10 display port black screen on high resolution

I've recently upgraded to ubuntu 23.10 on a Gigabyte G5GE Laptop. I have 2 monitors connected, HDMI and mini-DP. Laptop has 2 graphic cards : lspci | grep VGA 00:02.0 VGA compatible controller: Intel ...
0 votes
0 answers
62 views

Problem connecting a third monitor via the USB port of the Dell D6000 dock in Ubuntu 20.04. Only recognizes audio input

I have a Dell dock and I can't connect a third monitor via the Dell dock to the USB port on the notebook (Dell too) with Ubuntu 20.04, but curiously it only recognizes the monitor as an audio input ...
0 votes
0 answers
122 views

Lenovo ThinkCentre M92p DisplayPort to HDMI - no screen

I'm trying to build a media centre out of a ThinkCentre M92p using Ubuntu 22.04 Desktop and I've confirmed that the DisplayPort output works, but when I try to use a DP to HDMI adapter I don't get a ...
4 votes
1 answer
4k views

Ubuntu 20.04 does not detect monitor using type-c DisplayPort

I'm using Ubuntu 20.04.2 LTS Laptop DELL G3 3500 Graphics card: NVIDIA Corporation / GeForce GTX 1650 Ti/PCIe/SSE2 (from system settings) I've used to connect my second monitor using type-c ...
0 votes
1 answer
257 views

Display port monitor not turning on after turned off Ubuntu 22.04.3

I have an odd problem. When my monitor is manually turned off or goes to power-saving mode, Ubuntu won't detect it when I try to turn on the monitor. I see a blank screen where the DisplayPort input ...
1 vote
0 answers
335 views

Ubuntu 22.04: Display port works in Mirror mode but not Extended mode

When trying to connect a Dell P2213t via Display port to the computer, the screen is blank during booting (it still shows Grub). Ctrl+Alt+F2 doesn't work either, but it seems the computer is booted as ...
1 vote
0 answers
596 views

Can't add custom resolutions on Display Port

Just installed Ubuntu 23.04 and found out that I can't change the default resolution 1920 x 1080 via the display settings. Tried adding custom resolution using xrandr --addmode and got the problem ...
1 vote
0 answers
32 views

Extended Monitor Mode With Hdmi To DisplayPort Converter

my laptop is Ideapad L3, and I have two monitors with DisplayPort connections (Laptop HDMI to DP converter -> Dell u2419h DP -> Dell u2417h DP). Problem: I need extended mode for both monitors, ...
0 votes
0 answers
28 views

Unable to use full resolution of a 4k monitor using Digital Port

I recently upgraded my system with a Ryzen 9 7900 with integrated radeon graphics and the motherboard has two video ports: HDMI and DP. When I connect my 4K monitor (Samsung LU28E590DS) on the HDMI ...
1 vote
1 answer
2k views

DisplayPort not detected on ThinkPad T14 Gen 3 with Ubuntu 22.04

I am having series issues connecting external monitors to my new ThinkPad T14 Gen3. For once it cannot detect the HDMI port at all, which is annoying but avoidable as it can detect HDMI via a dock ...
3 votes
3 answers
8k views

How to enable a daisy-chained DisplayPort monitor via USB-C?

I'm running Xubuntu 20.04 on an HP Elitebook 845 G7 which has an AMD Ryzen 7 PRO 4750U with Radeon Graphics. I've been trying to use two daisy-chained DisplayPort monitors (Dell P2421DC) connected via ...
0 votes
1 answer
352 views

Built in Camera in Dell C3422WE not recognized Ubuntu 22.04

I have a Dell Monitor C3422WE with a built-in camera and microphone (for video calls). I have a fresh install of Ubuntu 22.04 with an Nvidia driver. The Nvidia card is connected to the monitor via ...
0 votes
1 answer
265 views

Ubuntu 22.04 sound line out always detects unplugged

Recently the OS crashed after updating. Then I tried to reinstall Ubuntu. It turns out it can't detect the audio output via the DP port. Pulse Audio: The speaker of my monitor works fine. The tricky ...
0 votes
0 answers
244 views

Dual monitors not working on Ubuntu 22.04

I have trying to run 2 4K monitors from an HP t630 thin client. It has 2 display ports. With some trouble I got it working on the monitors at my desk but when plugging in to the wall mounted monitors ...
0 votes
1 answer
297 views

New AMD 6700 GPU. Ubuntu doesn't recoginize monitor connected via DisplayPort. xRandar doesn't see the ports

I bought a PowerColor Bc-2235 video card using a AMD 6700 (non-XT) GPU. The card works just fine with mi HDMI monitor, but I can't make it work with a secundary monitor connected via DisplayPort. The ...
0 votes
0 answers
34 views

3rd video output(display port) wont fractal scaling independently of the hdmi output

https://askubuntu.com/a/1400572/112263 I found this question/answer that suggested using the fractal scaling option to get screens to act as if they were same size. I want this so there is no "...
0 votes
0 answers
228 views

No video signal on P2419HC monitor through Dell Latitude 5430 usb-c during cold boot

my current setup is composed by a Dell Latitude 5430 laptop and a Dell P2419HC monitor. The laptop is powerd by Ubuntu 20.04.6 LTS and is connected to the monitor through a usb-c cable, I'm leveraging ...
0 votes
0 answers
24 views

Monitor is not recognized after 5-10 seconds ubuntu

I had and have this problem on Ubuntu 20.04 and 22.04. I connect laptop to external 4k monitor. In the beginning everything works ok. I can connect via HDMI or DisplayPort, everything is fine. After ...
2 votes
2 answers
1k views

My HDMI/DISPLAY port Audio stopped working on Ubuntu 22.10

I've been using Ubuntu 22.10 for quite some time, my HDMI/Display port audio always worked until yesterday when it suddenly stopped working. I guess some automatic update happened and now the driver ...
0 votes
0 answers
46 views

Displayport to hdmi cable goes no signal in ubuntu after 10 seconds

I bought a Displayport to HDMI cable to use my second monitor, on my b660 plus asus motherboard which has a displayport along an hdmi port. I also have igpu on cpu (intel 12400). When I connect my ...
11 votes
1 answer
35k views

USB display adapter with linux/ubuntu drivers?

I want to use my external monitor's resolution fully (2560x1440) with a USB display adapter for my laptop. I have one with Windows drivers, are there any adapter with linux / Ubuntu drivers that can ...
9 votes
3 answers
17k views

OS freezing with dual monitors on Ubuntu 22.04 LTS

I have a fresh install of Ubuntu 22.04 on a new laptop, with no other OS installed. When I connect to my monitor with the laptop open (so that the built-in display is active) everything freezes - I ...
0 votes
1 answer
147 views

Displayport Not Working Ubuntu 22.04/Intel HD 4000

I am trying to connect my second monitor through DisplayPort. My first monitor is connected to HDMI port. The DisplayPort is not detected. I am new to Ubuntu. The drivers installed. lspci -k | grep -...
0 votes
0 answers
117 views

DP Alt mode USBC stops work working periodically

I have Lenovo Thinkpad P1 Gen 3.(Nvidia Quadro graphics and a video output controller.) And a Lenovo 1 wire monitor - USB-C Hub + DP Alt mode. This setup's video (DP part) randomly stops working and ...
1 vote
2 answers
2k views

Ubuntu 22.04 nvidia gpu immediately puts display port connected monitors in standby mode

Setup and Problem I'm running a Ubuntu 22.04 with a Nvidia RTX 3070-ti with two monitors. The GPU has 1 hdmi port and 3 display ports. Whichever monitor is plugged into the hdmi slot is by the ...
0 votes
0 answers
442 views

How can I get full (2560x1440) resolution on my external display?

I am using AOC Q3279VWF as a monitor, but am only able to reach 1920x1080 resolution. I would like to achieve the full 2560x1440 resolution of the monitor. This is listed as an option in the display ...
0 votes
0 answers
384 views

Notebook/docking station Ubuntu support 2 external monitors

TLDR What notebook and and docking station seamlessly supports 2 large external monitors? My personal computer is an Asus zenbook (UX390) with "plugable" usb-c docking station. I have a ...
0 votes
1 answer
2k views

Displays on Thunderbolt dock stopped working

During a recent kernel update, my Thunderbolt dock (a Thinkpad Thunderbolt 3 Gen 2) stopped working. My computer (A Lenovo Thinkpad P50) still responds to the mouse and keyboard connected to the dock, ...
0 votes
1 answer
474 views

Ubuntu sets refresh rate to 120 Hz automatically

I recently bought two new Dell P2723DE displays (27 inch, 2560x1440). I have them set up in a daisy chain configuration, connected to my stationary dual boot (Windows 10 and Ubuntu 20.04) computer. ...
0 votes
0 answers
121 views

DisplayPort 'breaks' on boot

I am not sure if this is even an Ubuntu question as it very well could be some kind of electrical power race condition. The connected DisplayPort stops working on boot; more details below. My setup: ...
0 votes
0 answers
86 views

Multiscreen by DisplayPort

I have a Dell unit connected to two screen by Display Port. After first reboot, only one screen is working. The other displays "no DP signal". If I change the cable from one port to another ...
2 votes
0 answers
620 views

DisplayLinkManager High CPU usage

I am currently experiencing high CPU usage when ever I'm using my Thinkpad USB 3.0 ultra dock that has a screen connected with DisplayPort. I also have another screen connected with a HDMI cable ...
2 votes
1 answer
404 views

Xrandr gives wrong info about screen connections?

After a fresh install of Ubuntu 22.04 LTS I fail to get my second screen to work. Google does not turn up much useful, nothing that has worked yet. So after spent a couple of days searching, I decided ...
0 votes
1 answer
529 views

DP alt mod display stopped working

After about 6 months external dell 4k display stopped working with laptop (ubuntu 20.04) via USB type C. Since February 2022 I have setup: Dell Lalilude 7410 with Ubuntu 20.04, with 5.13.0-35 kernel ...
0 votes
0 answers
62 views

No graphical output if computer boots with monitor set to different input

My Dell 3008WFP monitor supports multiple inputs. I have two computers, an Ubuntu 22.04 machine connected to the DisplayPort input, and a Windows Surface Pro machine connected to the HDMI input. When ...
0 votes
0 answers
52 views

Connection to 2nd monitor via DP is recognized but doesn't display

Running Ubuntu 18.04 on an X1 Carbon with two Dell monitors connected via DisplayPort. I've historically connected monitor 1 via DP and monitor 2 via HDMI without issue, but recently swapped out the ...
0 votes
1 answer
406 views

Ubuntu 22.04 displayport cutting in and out

I have Ubuntu 22.04 and an NVIDIA Corporation GA102 GeForce RTX 3080 video card. The video card has 3 Displayport outputs and 1 HDMI. I have an ASUS VE278 monitor that has the HDMI plugged in and it ...
0 votes
1 answer
980 views

second monitor detected but screen is black

I have Ubuntu 22.04, a GeForce 3080 with an ASUS VE278 and an ASUS VE276. Both monitors are connected with DisplayPort cables. If I run this: $ xrandr --listmonitors Monitors: 2 0: +*DP-1 1920/...
1 vote
0 answers
664 views

Thunderbolt 2 (MacBook Pro 2013) / Ubuntu 18.04 Display Issue

Good day, I have ubuntu 18.04 running on a 2013 model MacBook Pro. This Mac model has two thunderbolt 2 ports on the left side. One port is working flawlessly; however, the other (nearest to the ...
1 vote
0 answers
1k views

KDE Plasma suddenly not showing display resolution above 1080p

I've been trying to get this back all night but I've failed so I thought I'd come here and ask. I was moving my machine (HP Z240 with standard Intel graphics) running Ubuntu Studio 21.10 that was ...
2 votes
1 answer
6k views

No sound through DisplayPort

I can't get sound on my desktop. My setup looks like this: Graphics Card -> (Display Port) -> KVM Switch -> (Display Port) -> Monitor -> (3.5mm connector) -> Speakers When I boot my ...
6 votes
1 answer
4k views

Displayport Sound Delay on Ubuntu 20.04/20.10

I have decided to try switching to Ubuntu in a dual-boot scenario with Windows 10, and things work perfectly overall, but I have encountered one bug that really ruins the experience. I get my sound ...
0 votes
2 answers
1k views

Multi monitor on a Macbook Pro Retina 11,3 (Late 2013) with NVIDIA

Does this Mac have something like Optimus for switching between the Intel and NVIDIA card? Do you know if multimonitor works, connecting two monitors to each Thunderbolt port (two external monitors + ...
1 vote
0 answers
976 views

screens keep switching display port names/numbers – how to configure settings?

I have a notebook (Lenovo Thinkpad T14) running Ubuntu 21.10 (and another similar one running Ubuntu 20.4) with Xfce4 (aka XUbuntu) and a Thinkpad USB-C docking station, to which I've connected two ...

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