[GH-ISSUE #741] Enhancement: Allow mouse speed scaling for clients with dissimilar DPI

gitea-mirror commented

2026-05-05 06:42:58 -06:00

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Originally created by @hovissimo on GitHub (Jun 8, 2020).
Original GitHub issue: https://github.com/debauchee/barrier/issues/741

Operating Systems

Server: N/A (Windows 10 1809)

Client: N/A (Ubuntu 20.04)

Barrier Version

2.2.0 installed via apt

Steps to reproduce bug

In my specific scenario my server's single display is 2560x1440 and the client's single display is 3840x2160. The mouse "feels" way too slow on the client, assumably because the mouse updates are done in screen pixels. This issue is an enhancement request for mouse position scaling. MVP would be a client parameter configured on the server, but hopefully a conversion factor could be figured (and maybe enabled?) automatically.

Other info

When did the problem start to occur?
N/A
Is there a way to work around it?
Trying to adjust mouse speed on the client isn't a good workaround, it doesn't work in Ubuntu 20.04 and it would affect the local mouse as well.
Does this bug prevent you from using Barrier entirely?
No

#195 is related.

Originally created by @hovissimo on GitHub (Jun 8, 2020). Original GitHub issue: https://github.com/debauchee/barrier/issues/741 ### Operating Systems ### Server: N/A (Windows 10 1809) Client: N/A (Ubuntu 20.04) ### Barrier Version ### 2.2.0 installed via apt ### Steps to reproduce bug ### In my specific scenario my server's single display is 2560x1440 and the client's single display is 3840x2160. The mouse "feels" way too slow on the client, assumably because the mouse updates are done in screen pixels. This issue is an enhancement request for mouse position scaling. MVP would be a client parameter configured on the server, but hopefully a conversion factor could be figured (and maybe enabled?) automatically. ### Other info ### * When did the problem start to occur? N/A * Is there a way to work around it? Trying to adjust mouse speed on the client isn't a good workaround, it doesn't work in Ubuntu 20.04 and it would affect the local mouse as well. * Does this bug prevent you from using Barrier entirely? No #195 is related.

gitea-mirror commented

2026-05-05 06:43:01 -06:00

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@linaori commented on GitHub (Jun 26, 2020):

Today I forgot to bring home my display port to dvi converter. I can't stare at my laptop screen, it's too small. I tried fractional scaling on Ubuntu 20.04 with barrier and it turns out that my mouse becomes slow on the client. Changing the mouse speed doesn't work, it remains slow. This makes fractional scaling unusable for me :(

@linaori commented on GitHub (Jun 26, 2020): Today I forgot to bring home my display port to dvi converter. I can't stare at my laptop screen, it's too small. I tried fractional scaling on Ubuntu 20.04 with barrier and it turns out that my mouse becomes slow on the client. Changing the mouse speed doesn't work, it remains slow. This makes fractional scaling unusable for me :(

gitea-mirror commented

2026-05-05 06:43:02 -06:00

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@aaronjensen commented on GitHub (Jul 8, 2020):

I ran into the opposite problem. The mouse was too fast on the client. Luckily, my server is linux, so I set up barrier to log to /tmp/barrier.log and then I run the below script. You should be able to tweak the speeds to your liking. Note that you'll need to plug in your mouse and speed property. You may be able to do a similar thing with Windows or macOS as the server if you know how to change the mouse speed via the shell.

#!/usr/bin/env bash
set -eu

# Find with: xinput --list --short
mouse="Kingsis Peripherals Evoluent VerticalMouse D"
# Find with: xinput --list-props $mouse
speed_property="libinput Accel Speed"
server_mouse_speed=0.252669
client_mouse_speed=-0.743772

function finish {
  xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
}
trap finish EXIT

tail -F -n0 /tmp/barrier.log | while read line
do
  if [[ "$line" == *"leaving screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed"
  elif [[ "$line" == *"entering screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
  fi
done

@aaronjensen commented on GitHub (Jul 8, 2020): I ran into the opposite problem. The mouse was too fast on the client. Luckily, my server is linux, so I set up barrier to log to `/tmp/barrier.log` and then I run the below script. You should be able to tweak the speeds to your liking. Note that you'll need to plug in your mouse and speed property. You may be able to do a similar thing with Windows or macOS as the server if you know how to change the mouse speed via the shell. ```sh #!/usr/bin/env bash set -eu # Find with: xinput --list --short mouse="Kingsis Peripherals Evoluent VerticalMouse D" # Find with: xinput --list-props $mouse speed_property="libinput Accel Speed" server_mouse_speed=0.252669 client_mouse_speed=-0.743772 function finish { xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" } trap finish EXIT tail -F -n0 /tmp/barrier.log | while read line do if [[ "$line" == *"leaving screen" ]]; then xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed" elif [[ "$line" == *"entering screen" ]]; then xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" fi done ```

gitea-mirror commented

2026-05-05 06:43:04 -06:00

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@hovissimo commented on GitHub (Jul 28, 2020):

@aaronjensen That hack is evil and I love it. Regretfully, I have to have the server running on the Windows machine and I'm not feeling bullish about scripting mouse speeds on Windows.

@hovissimo commented on GitHub (Jul 28, 2020): @aaronjensen That hack is evil and I love it. Regretfully, I have to have the server running on the Windows machine and I'm not feeling bullish about scripting mouse speeds on Windows.

gitea-mirror commented

2026-05-05 06:43:06 -06:00

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@jasonyavorsky commented on GitHub (Aug 3, 2020):

Would love this, my barrier host is on 1080p and my client is 4k so the mouse moves very slow on the client.

@jasonyavorsky commented on GitHub (Aug 3, 2020): Would love this, my barrier host is on 1080p and my client is 4k so the mouse moves very slow on the client.

gitea-mirror commented

2026-05-05 06:43:08 -06:00

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@yangshao commented on GitHub (Aug 7, 2020):

I have the same issue, the mouse on the client(mac) is too fast and i'm on the windows server, hope to see some updates soon.

@yangshao commented on GitHub (Aug 7, 2020): I have the same issue, the mouse on the client(mac) is too fast and i'm on the windows server, hope to see some updates soon.

gitea-mirror commented

2026-05-05 06:43:10 -06:00

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@mono424 commented on GitHub (Aug 17, 2020):

+1 mouse speed settings per client would be awesome 💯

@mono424 commented on GitHub (Aug 17, 2020): +1 mouse speed settings per client would be awesome 💯

gitea-mirror commented

2026-05-05 06:43:11 -06:00

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@psignoret commented on GitHub (Aug 31, 2020):

@hovissimo I've ported @aaronjensen's wonderful hack to PowerShell: https://gist.github.com/psignoret/32cecc507fba2508d05f4672fe52eeb2. Example usage:

.\BarrierMouseSpeedFix.ps1 -ClientMouseSpeed 3 -LogFile "C:\tmp\barrier.log"

@psignoret commented on GitHub (Aug 31, 2020): @hovissimo I've ported @aaronjensen's wonderful hack to PowerShell: https://gist.github.com/psignoret/32cecc507fba2508d05f4672fe52eeb2. Example usage: ```powershell .\BarrierMouseSpeedFix.ps1 -ClientMouseSpeed 3 -LogFile "C:\tmp\barrier.log" ```

gitea-mirror commented

2026-05-05 06:43:12 -06:00

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@mr-samuca commented on GitHub (Sep 29, 2020):

I ran into the opposite problem. The mouse was too fast on the client. Luckily, my server is linux, so I set up barrier to log to /tmp/barrier.log and then I run the below script. You should be able to tweak the speeds to your liking. Note that you'll need to plug in your mouse and speed property. You may be able to do a similar thing with Windows or macOS as the server if you know how to change the mouse speed via the shell.
#!/usr/bin/env bash
set -eu

# Find with: xinput --list --short
mouse="Kingsis Peripherals Evoluent VerticalMouse D"
# Find with: xinput --list-props $mouse
speed_property="libinput Accel Speed"
server_mouse_speed=0.252669
client_mouse_speed=-0.743772

function finish {
  xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
}
trap finish EXIT

tail -F -n0 /tmp/barrier.log | while read line
do
  if [[ "$line" == *"leaving screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed"
  elif [[ "$line" == *"entering screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
  fi
done

I added an extra:

 elif [[ "$line" == *"can't leave screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"

because gnome will trap the cursor when i'm interacting with the interface. It takes a little less then a second to work, tho.

@mr-samuca commented on GitHub (Sep 29, 2020): > I ran into the opposite problem. The mouse was too fast on the client. Luckily, my server is linux, so I set up barrier to log to `/tmp/barrier.log` and then I run the below script. You should be able to tweak the speeds to your liking. Note that you'll need to plug in your mouse and speed property. You may be able to do a similar thing with Windows or macOS as the server if you know how to change the mouse speed via the shell. > > ```shell > #!/usr/bin/env bash > set -eu > > # Find with: xinput --list --short > mouse="Kingsis Peripherals Evoluent VerticalMouse D" > # Find with: xinput --list-props $mouse > speed_property="libinput Accel Speed" > server_mouse_speed=0.252669 > client_mouse_speed=-0.743772 > > function finish { > xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" > } > trap finish EXIT > > tail -F -n0 /tmp/barrier.log | while read line > do > if [[ "$line" == *"leaving screen" ]]; then > xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed" > elif [[ "$line" == *"entering screen" ]]; then > xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" > fi > done > ``` I added an extra: ```shell elif [[ "$line" == *"can't leave screen" ]]; then xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" ``` because gnome will trap the cursor when i'm interacting with the interface. It takes a little less then a second to work, tho.

gitea-mirror commented

2026-05-05 06:43:14 -06:00

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@gwillen commented on GitHub (Nov 29, 2020):

I, too, love this terrible hack. Does anybody have an equivalent one for when the server is running on macOS?

@gwillen commented on GitHub (Nov 29, 2020): I, too, love this terrible hack. Does anybody have an equivalent one for when the server is running on macOS?

gitea-mirror commented

2026-05-05 06:43:16 -06:00

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@MANTENN commented on GitHub (Feb 19, 2021):

I, too, love this terrible hack. Does anybody have an equivalent one for when the server is running on macOS?

What's your client device? I am using ubuntu as the client and I have macOS as the server. You only need to adjust the speed on the client to make it consistent. The script doesn't work for me on ubuntu had to make some changes.

It runs and adjusts the property values but I am not seeing the changes with the UI.

@MANTENN commented on GitHub (Feb 19, 2021): > I, too, love this terrible hack. Does anybody have an equivalent one for when the server is running on macOS? What's your client device? I am using ubuntu as the client and I have macOS as the server. You only need to adjust the speed on the client to make it consistent. The script doesn't work for me on ubuntu had to make some changes. It runs and adjusts the property values but I am not seeing the changes with the UI.

gitea-mirror commented

2026-05-05 06:43:17 -06:00

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Owner

@MANTENN commented on GitHub (Feb 19, 2021):

I ran into the opposite problem. The mouse was too fast on the client. Luckily, my server is linux, so I set up barrier to log to /tmp/barrier.log and then I run the below script. You should be able to tweak the speeds to your liking. Note that you'll need to plug in your mouse and speed property. You may be able to do a similar thing with Windows or macOS as the server if you know how to change the mouse speed via the shell.
#!/usr/bin/env bash
set -eu

# Find with: xinput --list --short
mouse="Kingsis Peripherals Evoluent VerticalMouse D"
# Find with: xinput --list-props $mouse
speed_property="libinput Accel Speed"
server_mouse_speed=0.252669
client_mouse_speed=-0.743772

function finish {
  xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
}
trap finish EXIT

tail -F -n0 /tmp/barrier.log | while read line
do
  if [[ "$line" == *"leaving screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed"
  elif [[ "$line" == *"entering screen" ]]; then
    xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
  fi
done

For Snap Packages you will need to run the script as admin.

#!/usr/bin/env bash
set -eu

# Find with: xinput --list --short
mouse="PS/2 Logitech Wheel Mouse"
# Find with: xinput --list-props $mouse
speed_property="libinput Accel Speed"
server_mouse_speed=0.752669
client_mouse_speed=-0.743772

function finish {
  xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
}
trap finish EXIT

tail -F -n0 /tmp/snap.barrier/tmp/barrier.log | while read line
do
  if [[ "$line" == *"leaving screen" ]]; then
    echo "setting mouse speed back to normal"
    xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed"
  elif [[ "$line" == *"entering screen" ]]; then
    echo "setting mouse speed to server"
    xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed"
  fi
done

Make it executable
chmod +x ~/barrier.sh

@MANTENN commented on GitHub (Feb 19, 2021): > I ran into the opposite problem. The mouse was too fast on the client. Luckily, my server is linux, so I set up barrier to log to `/tmp/barrier.log` and then I run the below script. You should be able to tweak the speeds to your liking. Note that you'll need to plug in your mouse and speed property. You may be able to do a similar thing with Windows or macOS as the server if you know how to change the mouse speed via the shell. > > ```shell > #!/usr/bin/env bash > set -eu > > # Find with: xinput --list --short > mouse="Kingsis Peripherals Evoluent VerticalMouse D" > # Find with: xinput --list-props $mouse > speed_property="libinput Accel Speed" > server_mouse_speed=0.252669 > client_mouse_speed=-0.743772 > > function finish { > xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" > } > trap finish EXIT > > tail -F -n0 /tmp/barrier.log | while read line > do > if [[ "$line" == *"leaving screen" ]]; then > xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed" > elif [[ "$line" == *"entering screen" ]]; then > xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" > fi > done > ``` For Snap Packages you will need to run the script as admin. ``` #!/usr/bin/env bash set -eu # Find with: xinput --list --short mouse="PS/2 Logitech Wheel Mouse" # Find with: xinput --list-props $mouse speed_property="libinput Accel Speed" server_mouse_speed=0.752669 client_mouse_speed=-0.743772 function finish { xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" } trap finish EXIT tail -F -n0 /tmp/snap.barrier/tmp/barrier.log | while read line do if [[ "$line" == *"leaving screen" ]]; then echo "setting mouse speed back to normal" xinput --set-prop "$mouse" "$speed_property" "$client_mouse_speed" elif [[ "$line" == *"entering screen" ]]; then echo "setting mouse speed to server" xinput --set-prop "$mouse" "$speed_property" "$server_mouse_speed" fi done ``` Make it executable `chmod +x ~/barrier.sh`

gitea-mirror commented

2026-05-05 06:43:20 -06:00

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@Alexey-Tsarev commented on GitHub (Nov 3, 2021):

Better idea is implement something like an option in a client's settings.
Something like - mouse movement coefficient.
By default it's 1.
If someone wants twice speed, then the value is 2.
And the opposite, if mouse speed is too fast, then 0.5.

@Alexey-Tsarev commented on GitHub (Nov 3, 2021): Better idea is implement something like an option in a client's settings. Something like - mouse movement coefficient. By default it's 1. If someone wants twice speed, then the value is 2. And the opposite, if mouse speed is too fast, then 0.5.

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[GH-ISSUE #741] Enhancement: Allow mouse speed scaling for clients with dissimilar DPI #581

Operating Systems

Barrier Version

Steps to reproduce bug

Other info