Mouse cursor jumps to other screen

a-fitz · 08-06-2021, 02:33 AM

I'm dealing with the same issue on Ubuntu 20.04 with DisplayLink 5.4.0-55.153. I have also applied the official xserver-xorg-core fix from the DisplayLink team. I have not tried the fix that @gavine99 recommended because no "cursor_events" file exists in any of my "/sys/devices/platform/evdi.%/" directories.

The issue does not appear in screen recordings, but I can take a camera recording (gross) if someone requests it.

Anpan · 08-07-2021, 04:01 PM

I had this issue but have resolved it using xrandr with the -scale flag to set my scaling on the monitors connected to my dock to 0.9999x0.9999

Anpan · 08-07-2021, 05:26 PM

Actually realised that my above solution caused a fairly significant performance issue

gavine99 · 08-07-2021, 09:36 PM

@a-fitz, I'm using DL 5.3.1. You could try downgrading to 5.3.1 and see if the cursor_events virtual file turns up.

BTW, I tried several methods to apply the fix automagically each time X was started but they all had issues. I ended up creating a systemd service with a 'sleep hack' as follows which seems to work quite reliably;

File: /etc/systemd/system/fix-evdi-mouse-cursor-events.service
[Unit]
Description=fix X cursor flashing at screen sides because of evdi cursor events
After=displaylink-driver.service

[Service]
Type=oneshot
ExecStart=/bin/sh -c 'sleep 5; /bin/echo 0 > /sys/devices/platform/evdi.1/cursor_events'

[Install]
WantedBy=graphical.target

I know a better method must exist and if anyone develops it please share.

gavine99 · 10-25-2021, 05:25 AM

I just installed driver version 5.4.1-55.174 and it fixes the issue for me. Which is good because the /sys/devices/platform/evdi.?/cursor_events files are no provided by the software to allow manual manipulated config.

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08-07-2021, 04:01 PM	#2
Anpan Junior Member Join Date: Aug 2021 Posts: 2	I had this issue but have resolved it using xrandr with the -scale flag to set my scaling on the monitors connected to my dock to 0.9999x0.9999

08-07-2021, 05:26 PM	#3
Anpan Junior Member Join Date: Aug 2021 Posts: 2	Actually realised that my above solution caused a fairly significant performance issue

08-07-2021, 09:36 PM	#4
gavine99 Junior Member Join Date: Nov 2020 Posts: 4	@a-fitz, I'm using DL 5.3.1. You could try downgrading to 5.3.1 and see if the cursor_events virtual file turns up. BTW, I tried several methods to apply the fix automagically each time X was started but they all had issues. I ended up creating a systemd service with a 'sleep hack' as follows which seems to work quite reliably; File: /etc/systemd/system/fix-evdi-mouse-cursor-events.service [Unit] Description=fix X cursor flashing at screen sides because of evdi cursor events After=displaylink-driver.service [Service] Type=oneshot ExecStart=/bin/sh -c 'sleep 5; /bin/echo 0 > /sys/devices/platform/evdi.1/cursor_events' [Install] WantedBy=graphical.target I know a better method must exist and if anyone develops it please share.

10-25-2021, 05:25 AM	#5
gavine99 Junior Member Join Date: Nov 2020 Posts: 4	I just installed driver version 5.4.1-55.174 and it fixes the issue for me. Which is good because the /sys/devices/platform/evdi.?/cursor_events files are no provided by the software to allow manual manipulated config.