#StackBounty: #multiple-monitors #thinkpad Problem with multiple displays on Lenovo P43s and ThinkPad Thunderbolt 3 Gen 2 (Ubuntu 20.04)

Bounty: 100

I am running Ubuntu 20.04 on a Lenovo Thinkpad P43s where I connect my display (Dell) through a ThinkPad Thunderbolt 3 Dock Gen 2:

https://support.lenovo.com/dk/en/solutions/pd500265

Everything works fine until I lock my computer. When I then try to unlock it my external display does not turn on again. At least not most of the times, sometimes it works and other times it does not. And sometimes I can get it to work by turning the external display off/on or disconnect/reconnect the dock.

This is very frustrating especially at work where I need to switch to different locations that has different displays.

I see the same problem on all displays I connect to through HDMI displayport.

I have found:

https://www.displaylink.com/downloads

which I have tried to install but it does nothing. Not sure if I need to run some configuration after I have installed it??

Any suggestions?

I would rather not have to exchange my Lenovo/Ubuntu for an Apple/OSX setup to get this to work.

Also I am on the latest version on the dock firmware:

enter image description here

And I don’t have the problem on Windows 10 (I have a multiboot/grub setup).

And apperantly I am not alone:

https://forums.lenovo.com/t5/Displays-Options-and-Accessories/Thunderbolt-3-Dock-Issue-with-Monitors-not-turning-on-after-wakeup-from-sleep/m-p/4304363


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#StackBounty: #drivers #usb #multiple-monitors #displaylink How to use displaylink adapter with ubuntu 18.4.4

Bounty: 100

I have installed the ubuntu driver software for display link adapter and followed the instructions at:

https://support.displaylink.com/know…on-legacy-ubun

However, Whenever I connect my usb 3.0 to dvi/vga adapter – ubuntu does not recognise a screen is attached.

I am using the following adapter:

https://www.kensington.com/p/product…splay-adapter/

The adapter does appear when using the
Code:

lsusb
yields the result:
Code:
Bus 001 Device 006: ID 17e9:430f DisplayLink

So I know that it has recognised the displaylink on the USB bus.

I have also run the DL support Tool found at:

https://support.displaylink.com/know…to-displaylink

I have been trying for weeks to get this working and it’s really frustrating – hopefully someone can help me out here, I just want to be able to use another monitor via my usb3.0 port and purchased this Kensington adapter to do so – but alas it’s not working.

If anyone can give me some advice or help I would be grateful!

I am using ubuntu 18.4.4 for reference.

I did cross post this on the actual displaylink forum but stuck for help at the moment!


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#StackBounty: #multiple-monitors #hdmi #displayport #thunderbolt Active/Passive Thunderbolt 3 to HDMI

Bounty: 150

I have a 2019 MacBook Pro 16" that has four thunderbolt 3 ports. Currently I have three cheap-o USB C to HDMI adapters that work well, but I feel like there is a drag on my system resources.

My question: is there an adapter that is preferred to allow the native Thunderbolt -> HDMI to pass through? I am fairly certain that those $20 dongles from Amazon are using the CPU in order to do the display output (are these considered active?).

According to the Thunderbolt website https://thunderbolttechnology.net/tech/faq, Thunderbolt natively supports Display Port. If I were to get a passive Thunderbolt 3 cable to Display Port, then get a DisplayPort to HDMI converter (my monitor doesn’t have Display Port) would this work without taxing the CPU?

Thanks in advance!


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#StackBounty: #multiple-monitors #display #20.04 #external-monitor Primary display flickering cursor, secondary display flickering blac…

Bounty: 50

I changed from a version of Windows that is not supported any more to Ubuntu 20.04.0. This laptop is connected to a TV monitor with a VGA cable (xrandr calls it VGA-1). The laptop does not have a HDMI port. I have had no issues on Windows with this cable at the same resolution and framerate.

The problem is that when I log in to a user (after a restart, and after logout), the laptop screen sometimes shows a black screen with the cursor flashing once every 0.5 seconds (best guess at timing). At this time, the secondary display flickers at the same rate between a black screen and no signal.

Sometimes the flickering stops after around 3 seconds and the desktop shows on the laptop monitor. Other times, the flickering continues indefinitely. I have tried pressing super+1 to open the first application (gedit) in the dock while it is flashing. gedit is not open when I disconnect the cable. Pressing super+1 after I can see the desktop opens gedit as expected.

The flickering can be temporarily fixed (until the next time the problem occurs after trying to log into a user) by disconnecting the VGA cable and reconnecting it. After reconnecting the cable, the desktop does the "popup" animation (expand from single point at center of screen to the whole monitor). This is regardless of how long I wait before disconnecting and reconnecting the cable.

The flickering does not happen at all when I log into a user if the VGA cable is not connected.

I have tried with and without fractional scaling (both at 100%) in single monitor mode on both laptop and TV display. The laptop resolution is 1440×1900 at 60 FPS and the TV resolution is 1280×720 at 60 FPS.

What can I do to prevent the "flickering indefinitely" while still being able to use the "single display" mode (on laptop monitor xor TV monitor)?


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#StackBounty: #nvidia #multiple-monitors #display #performance #fps How to turn down Refresh Rate of secondary monitor only? (Reduce GP…

Bounty: 50

I want to reduce the refresh rate of my secondary monitor to something really small, such that my GPU doesn’t has to do as much work.
But there is no option to change the refresh rate for my second monitor in the default "Displays" settings. It seems to be fixed at 60 Hz.

How can I throttle the refresh rate of my second monitor to only, let’s say 10 frames per second?… to free up some resources on my GPU.


Here is my display setup:

displays

I also couldn’t find an option in the NVIDIA X Server Settings:
nvidia x server settings

nvidia monitor

The output of xrandr is

Screen 0: minimum 8 x 8, current 3440 x 2520, maximum 16384 x 16384
DVI-I-0 connected 1920x1080+854+1440 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+
   1680x1050     59.95  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1280x720      60.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   640x480       75.00    59.94  
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 3440x1440+0+0 (normal left inverted right x axis y axis) 819mm x 346mm
   3440x1440     59.97 +  99.98* 
   3840x2160     59.94    50.00    29.97    25.00    23.98  
   2560x1080    100.00    59.94  
   1920x1080    100.00    60.00    59.94    50.00    29.97    25.00    23.98    60.00    50.04  
   1680x1050     59.95  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1280x720      60.00    59.94    50.00  
   1024x768      75.03    60.00  
   800x600       75.00    60.32  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    59.94    59.93  
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)


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#StackBounty: #gnome #multiple-monitors #20.04 Enable Sticky Edges Ubuntu 20.04

Bounty: 50

I recently upgraded to Ubuntu 20.04 and i can’t find any way to enable Sticky Edges, what i want is for the cursor to briefly stop on the edge before crossing over to the second monitor i don’t know if sticky edges is the right term for it but that’s what i found, somewhere else was referred to as cursor barrier.

What i have tried:

  • displays settings don’t have this option anymore
  • gnome tweak tools, could not find anything here either
  • dconf gnome shell overrides, only have edge tiling but this seems a different feature and even when enabled doesnt give me the behaviour i want

Any clue on how to do this on ubuntu 20.04?

(i can add screenshots of the things i have tried in case you think it should be in one of the things i already tried)


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#StackBounty: #windows-10 #graphics-card #display #multiple-monitors #resolution Win10 display settings 'Duplicate mode' interf…

Bounty: 50

I am gamer/programmer on Windows 10 64 bit Pro edition who plays/works at 1920 x 1080 resolution with the need to minimize my game to get to windows which is running at the same resolution. I am using 2 insignia monitors in ‘Duplicate’ mode with a GTX 970 Nvidia Graphics GPU

The issue I am having is that my monitors are receiving a resolution switch signal each time I make the switch from game to desktop or vice versa, despite that the game is played in 1080p and that the desktop resolution is also 1080p.

To understand this further you should understand that when I normally change resolutions in Windows, my TV produces an OSD showing which resolution is in effect. While this is considered normal behavior for the TVs that I am using while switching resolutions are waking from sleep, it is not normal when the resolution is not actually changing and that the devices are already on. Here is a shot of the OSD that pops up when I switch to game in the same resolution as the desktop:

enter image description here

After doing some testing I came to realize that the issue does not happen on either monitor when only one monitor is selected in the display settings (either when PC screen Only or Secondary screen only are selected). If Duplicate mode is enabled the issue is persistent.

enter image description here

So what I would like to understand (and correct if possible), is how Windows 10 and my GPU are handling the different monitor setups. There must be some technical explanation for why my hardware (monitors) are behaving differently in these different Windows monitor modes.
I would like to keep Duplicate mode enabled so I dont have to constantly switch between setups to accommodate this issue.


Get this bounty!!!

#StackBounty: #windows-10 #graphics-card #display #multiple-monitors #resolution Win10 display settings 'Duplicate mode' interf…

Bounty: 50

I am gamer/programmer on Windows 10 64 bit Pro edition who plays/works at 1920 x 1080 resolution with the need to minimize my game to get to windows which is running at the same resolution. I am using 2 insignia monitors in ‘Duplicate’ mode with a GTX 970 Nvidia Graphics GPU

The issue I am having is that my monitors are receiving a resolution switch signal each time I make the switch from game to desktop or vice versa, despite that the game is played in 1080p and that the desktop resolution is also 1080p.

To understand this further you should understand that when I normally change resolutions in Windows, my TV produces an OSD showing which resolution is in effect. While this is considered normal behavior for the TVs that I am using while switching resolutions are waking from sleep, it is not normal when the resolution is not actually changing and that the devices are already on. Here is a shot of the OSD that pops up when I switch to game in the same resolution as the desktop:

enter image description here

After doing some testing I came to realize that the issue does not happen on either monitor when only one monitor is selected in the display settings (either when PC screen Only or Secondary screen only are selected). If Duplicate mode is enabled the issue is persistent.

enter image description here

So what I would like to understand (and correct if possible), is how Windows 10 and my GPU are handling the different monitor setups. There must be some technical explanation for why my hardware (monitors) are behaving differently in these different Windows monitor modes.
I would like to keep Duplicate mode enabled so I dont have to constantly switch between setups to accommodate this issue.


Get this bounty!!!

#StackBounty: #windows-10 #graphics-card #display #multiple-monitors #resolution Win10 display settings 'Duplicate mode' interf…

Bounty: 50

I am gamer/programmer on Windows 10 64 bit Pro edition who plays/works at 1920 x 1080 resolution with the need to minimize my game to get to windows which is running at the same resolution. I am using 2 insignia monitors in ‘Duplicate’ mode with a GTX 970 Nvidia Graphics GPU

The issue I am having is that my monitors are receiving a resolution switch signal each time I make the switch from game to desktop or vice versa, despite that the game is played in 1080p and that the desktop resolution is also 1080p.

To understand this further you should understand that when I normally change resolutions in Windows, my TV produces an OSD showing which resolution is in effect. While this is considered normal behavior for the TVs that I am using while switching resolutions are waking from sleep, it is not normal when the resolution is not actually changing and that the devices are already on. Here is a shot of the OSD that pops up when I switch to game in the same resolution as the desktop:

enter image description here

After doing some testing I came to realize that the issue does not happen on either monitor when only one monitor is selected in the display settings (either when PC screen Only or Secondary screen only are selected). If Duplicate mode is enabled the issue is persistent.

enter image description here

So what I would like to understand (and correct if possible), is how Windows 10 and my GPU are handling the different monitor setups. There must be some technical explanation for why my hardware (monitors) are behaving differently in these different Windows monitor modes.
I would like to keep Duplicate mode enabled so I dont have to constantly switch between setups to accommodate this issue.


Get this bounty!!!

#StackBounty: #windows-10 #graphics-card #display #multiple-monitors #resolution Win10 display settings 'Duplicate mode' interf…

Bounty: 50

I am gamer/programmer on Windows 10 64 bit Pro edition who plays/works at 1920 x 1080 resolution with the need to minimize my game to get to windows which is running at the same resolution. I am using 2 insignia monitors in ‘Duplicate’ mode with a GTX 970 Nvidia Graphics GPU

The issue I am having is that my monitors are receiving a resolution switch signal each time I make the switch from game to desktop or vice versa, despite that the game is played in 1080p and that the desktop resolution is also 1080p.

To understand this further you should understand that when I normally change resolutions in Windows, my TV produces an OSD showing which resolution is in effect. While this is considered normal behavior for the TVs that I am using while switching resolutions are waking from sleep, it is not normal when the resolution is not actually changing and that the devices are already on. Here is a shot of the OSD that pops up when I switch to game in the same resolution as the desktop:

enter image description here

After doing some testing I came to realize that the issue does not happen on either monitor when only one monitor is selected in the display settings (either when PC screen Only or Secondary screen only are selected). If Duplicate mode is enabled the issue is persistent.

enter image description here

So what I would like to understand (and correct if possible), is how Windows 10 and my GPU are handling the different monitor setups. There must be some technical explanation for why my hardware (monitors) are behaving differently in these different Windows monitor modes.
I would like to keep Duplicate mode enabled so I dont have to constantly switch between setups to accommodate this issue.


Get this bounty!!!