Bug 440744

Summary:	KDE Connect remote input is slow and laggy
Product:	[Applications] kdeconnect	Reporter:	Kazi Rifat Morshed <kazirifat03.krm>
Component:	android-application	Assignee:	Albert Vaca Cintora <albertvaka>
Status:	REPORTED ---
Severity:	major	CC:	aria, daveyzach36, geopapougr, haochengho12907, ryanrms
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Android
OS:	Android 11.x
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Kazi Rifat Morshed 2021-08-08 14:45:58 UTC

SUMMARY
KDE Connect remote input is slow and laggy

STEPS TO REPRODUCE
1. use wifi direct for faster connection
2. use Bluetooth connection (like modern wireless keyboard and mouse does)
3. phn is connected with PC through a wire when USB Debugger is turned ON

OBSERVED RESULT
My android device (Samsung M21) is connected with my desktop (Windows 10) via KDE Connect. I curiously tried Remote Input (which one works as a touchpad on my phone's screen). However, it is was slow, laggy, and sometimes incorrect later bring a useless feature.

EXPECTED RESULT
It would work smoothly like a wired or wireless mouse


SOFTWARE/OS VERSIONS
Windows: Win 10 Pro 19043.1110
Android: 11 (ONE UI 3.1 Core)
Phone KDE Connect: 1.17.0 (6 May 2021)

ADDITIONAL INFORMATION
I have a wifi dongle and a Bluetooth dongle always connected with my PC. Sometimes, I also use a CAT6 LAN cable to connect my PC with my own personal router.

my mail: kazirifar03.krm@gmail.com
love from Bangladesh

Comment 1 Ryan Reamsbottom 2022-02-23 10:46:58 UTC

I found this bug looking for similar problems to my own, but thought I'd comment.

You shouldn't need either the Bluetooth connection nor the USB connection.  Simply being connected to the same router/wifi network is sufficient.  I don't have this issue on Fedora Silverblue 35 (w/GSConnect) and my Pixel 6.  Seems to work as intended.  Could be an issue with the way you are connecting or with the Windows version of KDEConnect.  Sorry can't help any more than that!  Good luck.

Comment 2 hch12907 2023-08-17 17:00:52 UTC

I can confirm this bug report.

It seems like there is some sort of buffering going on - if I keep on sending remote inputs (from my Android phone to my KDE laptop), the stutter will eventually go away, but after I stop for maybe a few seconds and send remote inputs again, the stutters will return.

Comment 3 Zach 2024-08-21 04:44:28 UTC

Not sure if my case was the same, but I had similar issues, and seemed to have resolved it but since I am on linux and not windows I am not sure my work around could help you, but it seems its the same issue. Choppy / laggy input and it does go away after a moment of persistence, but then after stopping for a moment it comes back and the cycle continues. 

https://discuss.kde.org/t/kde-connect-remote-input-is-very-laggy-and-choppy/18390

Comment 4 ariasuni 2025-01-28 16:47:51 UTC

As said in the KDE Discuss thread mentioned above, launching Steam seems to temporarily fix the issue, same with Discord, but it doesn’t work with e.g. Dolphin. I suppose launching XWayland does something that makes the input not laggy until some condition make it slow and choppy again.

Comment 5 geopapougr 2025-04-07 22:13:15 UTC

I can confirm. I use Arch and Aurora (Fedora Kinoite based) on fully updates systems. The issues was there before, and persists until now. I use my Samsung Galaxy Note 10+ with KDE connect. I have used other remote mouse apps in the past which worked flawlessly, so I doubt it is a network issue