Last call to make your voice heard! Our 2022 Developer Survey closes in less than a week. Take survey.

Questions tagged [displayport]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
1 answer
24 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 ...
user avatar
  • 101
3 votes
1 answer
1k 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 ...
user avatar
  • 31
1 vote
0 answers
76 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). ...
user avatar
  • 11
0 votes
0 answers
53 views

Display looses resolution in Ubuntu 20.04.3 LTS if monitor switch is not connected to another pc

I have a fresh installation of Ubuntu 20.04.3 LTS in a desktop which shares the screen with my laptop via a monitor switch. I have a set a custom resolution using cvt 1680 1050 # 1680x1050 59.95 Hz (...
user avatar
0 votes
0 answers
83 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 ...
user avatar
2 votes
0 answers
53 views

Monitor connected via eDP goes black for 1-2 seconds whenever I call xrandr

On my hardware there is only one single monitor attached at eDP-1. And whenever I call xrandr --query the monitor turns black for 1-2 seconds, although the command completes without an error. Also, I ...
user avatar
  • 131
0 votes
0 answers
216 views

Ubuntu 20.04.3 doesn't recognize display port

when I connect DP to monitor. Ubuntu will not recognize the monitor. but when I use DP to HDMI adaptor and connect to HDMI of monitor it works (see attached picture) I also installed mesa. when I ...
user avatar
-1 votes
1 answer
136 views

After update to 21.10, usb type-c displayport not work

After update to ubuntu 21.10, I can not connect to my usb type-c monitor
user avatar
  • 39
0 votes
0 answers
116 views

Unable to run Ubuntu Desktop GUI on Xilinx's ZCU104

I am trying to boot a Ubuntu Desktop 20.04.3 LTS image on my Xilinx ZCU104 platform. While I am able to login using the serial port, I am unable to view the GUI on my monitor. I see some boot commands ...
user avatar
2 votes
0 answers
172 views

Unable to set 2560x1600 resolution to Apple Cinema Display 30" via Apple Mini-Displayport to Dual-link DVI adapter on 2013 Macbook Pro 13"

I'm trying to revive a dusty old 13" MacBook Pro Early 2013 (Model A1425, 2.6 GHz i5) by installing Ubuntu (20.04 or 21.10, Lubuntu/Xubuntu/Ubuntu-Mate) on it. I have two 30" Apple Cinema ...
user avatar
  • 21
1 vote
0 answers
57 views

Unknown Display on DP-3. Only one display present

Ubuntu 18.04 LTS and 20.04 LTS show a second unknown display, which is not actually present. I have tried every related solution with no success. I am running Ubuntu 18.04 LTS. I have a NVIDIA ...
user avatar
  • 11
2 votes
0 answers
40 views

Disable log out when turning off the screen

I'm using Ubuntu 21.04 with Fluxbox as my Window Manager. My screen is connected via DisplayPort. The screen has multiple input ports and I often switch between different connected devices or ...
user avatar
  • 121
0 votes
0 answers
689 views

Ubuntu 20.04 does not detect external monitor through HDMI/DisplayPort adapter

I am trying to set up an external monitor to my laptop (Lenovo ThinkPad E14 Gen2). The monitor doesn't have an HDMI port, so I am using an HDMI/Display port adapter, but Ubuntu doesn't seem to detect ...
user avatar
  • 5
1 vote
0 answers
62 views

How to get MultiSeat (loginctl attach) to properly work with a MultiStreamDisplayPort card?

The native display on this All-in-One is the .../card0/card0-LVDS-1 and the DisplayPort attached external monitor is .../drm/card0/card0-DP-2 Was hoping to keep the LVDS as the embedded All-in-One and ...
user avatar
  • 406
0 votes
0 answers
102 views

laptop screen blank after plug/unplug from hdmi or usb-c

I have following issue, when I have set in power management 'don't sleep when lid is closed' and I have connected external monitor using hdmi or usb-c, sometimes when disconnect monitor from hdmi or ...
user avatar
0 votes
0 answers
63 views

3 Monitors not working on kubuntu 21.04

I want to have a setup with 3 monitors. I have a DELL precision T1650 with 32 GB RAM and + 1TB SSD. For display, I have 2 Phillips (1080P: 1920x1080) and one BenQ monitors(1080P: 1920x1080). The 2 ...
user avatar
  • 1,847
2 votes
1 answer
2k views

Displayport over USB-C stopped working - faulty drivers?

My laptop (Dell XPS 13, 9350) has a single USB-C port, which I am used to connecting to a docking station which is in turn connected to peripherals (USB devices, audio, display, power supply). One day ...
user avatar
  • 292
0 votes
0 answers
84 views

Primary Monitor briefly turns off (and rearranges windows) when Secondary Monitor (connected via Displayport) is turned off

The Problem at hand is DisplayPort itself, as turning of a monitor connected with it will terminate all connection to the computer, making it think that that monitor was removed and therefore ...
user avatar
  • 11
0 votes
0 answers
27 views

Strange Graphical Issues with 20.04.2.0 Live USB

I'm a windows noob looking to try linux so be kind. I created a 20.04.2.0 64 bit USB and booted from it and selected "try Ubuntu". First, it wasn't recognizing either of my display port ...
user avatar
0 votes
0 answers
22 views

WiFi connection gone after plugging in second DisplayPort monitor

I'm using Ubuntu 18.04.5 LTS in office lab, I'm able to connect wirelessly to my office WiFi network on my AGV unit while the icon on the top right hand always show an Ethernet connection, the AGV ...
user avatar
0 votes
0 answers
197 views

How to change from using HDMI output to Displayport output?

i am using an ubuntu computer with the following specs: AMD Ryzen 9 5950X ASUS ROG Strix X570-E Gaming Linux ubuntu desktop 20.04 PH-GTX1050-2G Kernel 5.13.2 generic A working HDMI 2.0 cable A working ...
user avatar
2 votes
1 answer
198 views

Ubuntu 21.04 freeze with display port

When i connect my monitor with display port, ubuntu freeze. Hard reboot not help because system not starting. But, when i connect with HDMI, it's all OK. 5.11.0-22-generic - ubuntu version GeForce ...
user avatar
0 votes
1 answer
176 views

How to use USB-A port for Displayport screen?

I have a Dell Latitude computer running Ubuntu which has just 1 USB-C port. I would like to connect two external monitors. On my Mac, I use two USB-C to Displayport cables and that works very smoothly....
user avatar
2 votes
0 answers
1k 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 ...
user avatar
  • 21
0 votes
1 answer
121 views

Main display randomly turns black and turns back on after some seconds

I am using Ubuntu 20.04.2 LTS. Nearly 2 times a day, my main screen randomly turns off (it seems like it is not recognized for a short period of time) and all my open windows will be moved to the ...
user avatar
  • 107
0 votes
0 answers
28 views

DisplayPort randomly changes resolution after powersave mode

I recently switched from using the HDMI ports on my monitors to using DisplayPort (for high fps gaming). On Ubuntu I've run into a really annoying problem: very often, when I leave my computer for a ...
user avatar
  • 101
0 votes
1 answer
1k views

Ubuntu 20.04 - USB-C to DisplayPort and issues with kernel log

I'm trying to connect a DisplayPort monitor on a laptop through a USB-C connector. However, it does not work. I'm using Ubuntu 20.04, uname -a: 5.8.0-50-generic #56~20.04.1-Ubuntu SMP Mon Apr 12 21:46:...
user avatar
  • 101
0 votes
0 answers
380 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 ...
user avatar
0 votes
0 answers
34 views

DisplayPort monitors (2) backlights turn on during suspend

When I suspend manually or by timed power management, my two displays turn off correctly, no backlight. However, at some point the backlights turn back on. If I walk by in the middle of the night, ...
user avatar
  • 207
3 votes
1 answer
2k 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 ...
user avatar
0 votes
0 answers
421 views

Ubuntu 20.04 LTS unable to detect second monitor

I have a desktop computer running on Ubuntu 20.04 LTS with the following hardware: 11th Gen Intel i5-11400 H510I PRO WIFI MSI motherboard no graphics card The motherboard has a DisplayPort and HDMI ...
user avatar
  • 1
1 vote
0 answers
113 views

Monitors connected to a Dock are not found

I have a Dell WD15 dock and an HP Envy 13 (13-ad012na) running KDE Neon 20.04, and I cant get DisplayPort monitors to work through it. I've found the following error in dgmesg when I connect a monitor ...
user avatar
1 vote
1 answer
1k views

HDMI + DisplayPort, both monitors detected, DP has no signal

I installed Ubuntu 20.04.1 on an Intel NUC10i7FNH. I connected two identical monitors, one on the HDMI port, a second with DP-HDMI adapter on the DisplayPort (Thunderbolt). Sometimes this works as ...
user avatar
  • 143
0 votes
0 answers
1k views

DisplayPort monitor is not functioning in Ubuntu 20.10

Recently purchased an ASUS TUF VG27WQ1B for a dual monitor setup. Ubuntu 20.10 seems unable to use the monitor over DisplayPort and the monitor reports 'NO SIGNAL'. Both monitors are plugged into a ...
user avatar
0 votes
1 answer
243 views

Displayport to HDMI no audio have video

Lenovo M58 Thinkcentre Operating System: Kubuntu 20.04 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 Kernel Version: 5.4.0-54-generic OS Type: 64-bit Processors: 2 × ...
user avatar
6 votes
1 answer
3k 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 ...
user avatar
2 votes
0 answers
631 views

USB Type-C port -> DP on monitor ThinkVision P27q-20 not working with HP ProBook 450 G7 on Ubuntu 20.4.1

I have the following configuration. Monitor Lenovo ThinkVision P27q-20 Laptop HP ProBook 450 G7 with Intel UHD graphics. Ubuntu 20.04.1, kernel 5.4.0-48-generic I connected USB Type-C port of the ...
user avatar
  • 21
0 votes
0 answers
349 views

Only Dummy Output as sound device, after every wake-up from sleep

If I wake up my desktop computer (Ubuntu 20.04.1 LTS) from sleep, the only sound device available is DummyOutput. I followed advice on doing this: $ pulseaudio -k ; alsa force-reload ...which fixes ...
user avatar
  • 1,003
2 votes
0 answers
774 views

Restart a Display-Port with the command line

Sorry if this has already been answered in some way before, but I was wondering if there was a way to restart a DisplayPort from the command line to put it simply. I've read some other similar ...
user avatar
1 vote
1 answer
941 views

Troubleshooting type-C alternate mode display connection

I'm currently trying to connect my new monitor Samsung C34H890 (LC34H890WGIXCI) to the Linux laptop but this doesn't work. I have tried the same setup but with Windows instead of Linux and everything ...
user avatar
1 vote
3 answers
3k 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 ...
user avatar
2 votes
0 answers
185 views

No GRUB menu during Ubuntu boot with 2 displays

I have installed Ubuntu 20.04, dual booting alongside Windows, but nothing shows up on both monitors on boot up w/ Ubuntu. I know that it is taking place in the background because it automatically ...
user avatar
  • 21
1 vote
0 answers
576 views

Reboot or shutdown hangs at "Reached target Reboot". task kworker/2:2:214 blocked for more than 120 seconds

This suddenly started happening today on my Lenovo Thinkpad X1 Extreme Gen 2. The system configuration has not changed from when this issue did not occur. I'm using NVIDIA's proprietary driver 440....
user avatar
2 votes
0 answers
372 views

Ubuntu 20.04 No Display Port Sound

Just upgraded from 19.10; audio worked fine before the upgrade. Sound coming from AMD Radeon 5700XT over display port. Monitor is an AOC U3477PQU. Ryzen 3700X; Asus Pro WS X570-ACE MB; 32GB RAM.
user avatar
  • 191
2 votes
0 answers
646 views

Ubuntu lag second monitor after laptop lid closed

I just have upgraded from Ubuntu 19.10 to 20.04 and everything works so far. Only problem that I have now is, when my laptop (Lenovo P50 with Quadro M1000M) is connected to an external monitor in ...
user avatar
  • 121
2 votes
2 answers
855 views

High-res tiled monitor support, 5120x2160, LG 34WK95

I have a new Dell Precission 5540 laptop that I connect to my LG 34WK95 display. In windows I get the full 5120x2160@60hz resolution, but in Ubuntu the best I can get is 3440x1440. The monitor is ...
user avatar
  • 495
1 vote
0 answers
344 views

Display port Audio Pass through Issue

I recently switched an old machine over to Ubuntu 19.10. My main problem is that display port audio pass through is not working consistently. Primary Symptom: I will often receive no sound. The ...
user avatar
2 votes
0 answers
682 views

19.10: Black screen & no GRUB when connecting DisplayPort to GTX970

The PC is connected via DisplayPort cable to the monitor. When I power on the PC, I can see the BIOS messages. When it comes to displaying the GRUB menu, the screen turns black and nothing happens. ...
user avatar
  • 21
2 votes
2 answers
2k views

Displayport MST, secondary monitor stuck in sleep-mode

I have a desktop running Ubuntu 19.10 LTS with a GeForce GTX 970. I have two Dell monitors U2515H and a U2713HM, the 27" is setup as primary monitor. The connection is PC->U2515H->U2713HM, with DP1.2 ...
user avatar
0 votes
1 answer
1k views

Issues with Gnome Night Light and DisplayPort to HDMI cables

I'm having issues getting Gnome's Night Light feature to work correctly with my monitor setup. I've recently switched to a new graphics card that has three DisplayPort outputs (in addition to one HDMI ...
user avatar