https://bugs.kde.org/show_bug.cgi?id=522226
Bug ID: 522226
Summary: Jumpy cursor with touchpad, fixed by disabling Shake
Cursor — root cause unclear
Classification: Plasma
Product: kwin
Version First 6.6.4
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Reproduce : just activate the Shake cursor option which is activated by default
and use your Asus touchpad, this is not happening all the time.
What happens :
The cursor was behaves erratically — frequent small jumps making precise
pointing difficult especially over text/UI elements. The Shake Cursor zoom
effect was never observed firing — not from real usage and not from the input
noise (the touchpad noise is small jumps, not fast back-and-forth shaking).
Hypothesis (unproven):
The Shake Cursor detector runs continuously analyzing cursor movement
patterns, even when no shake is detected. With a slightly noisy input source,
the detection logic itself may be interfering with normal cursor
processing/latency — independent of whether the zoom animation ever triggers.
Disabling the effect entirely resolved the symptom, even though the zoom was
never observed firing in the first place.
Environment:
- KDE Plasma 6.6.4
- Qt 6.10.3
- Fedora 43, kernel 6.18.9-200.fc43.x86_64
- KWin (Wayland)
- Touchpad: ELAN I2C HID (ASUE1200:00 04F3:3288) on ASUS laptop
P.S: meanwhile i was using(vary according to your computer) sudo sh -c 'echo
i2c-ASUE1200:00 > /sys/bus/i2c/drivers/i2c_hid_acpi/unbind && sleep 1 && echo
i2c-ASUE1200:00 > /sys/bus/i2c/drivers/i2c_hid_acpi/bind' to stop the glitch
--
You are receiving this mail because:
You are watching all bug changes.
