Bug 515858

Summary:	Unable to zoom on the lock screen
Product:	[Plasma] plasmashell	Reporter:	Mark Andrew Gerads <nazgand>
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	CONFIRMED ---
Severity:	minor	CC:	fella, olib141, taras.oleksyn
Priority:	NOR
Version First Reported In:	master
Target Milestone:	1.0
Platform:	CachyOS
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Mark Andrew Gerads 2026-02-11 08:08:45 UTC

SUMMARY
3-finger spread/unspread using a touchpad on a laptop does not zoom on the lock screen.

STEPS TO REPRODUCE
1. While logged in, spread 3 fingers on the touchpad to zoom in.
2. Lock the screen, which leaves the screen zoomed in.
3. Try to zoom out by unspreading 3 fingers on the touchpad.

OBSERVED RESULT
Unable to change zoom level on lock screen.

EXPECTED RESULT
Able to change zoom level on lock screen.

SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux 
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2
Kernel Version: 6.18.9-2-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 20 × 12th Gen Intel® Core™ i9-12900HK
Memory: 64 GiB of RAM (62.5 GiB usable)
Graphics Processor 1: Intel® Iris® Xe Graphics
Graphics Processor 2: NVIDIA GeForce RTX 3050 Ti Laptop GPU

Comment 1 Oliver Beard 2026-02-11 21:38:26 UTC

Can reproduce. Interestingly, [Meta] + [+], [Meta] + [-] and [Meta] + [0] are working.

Comment 2 Taras Oleksyn 2026-02-14 01:54:18 UTC

Hi,
seems like that's intentional for security reasons - https://invent.kde.org/plasma/kwin/-/blob/master/src/input.cpp?ref_type=heads#L455.
The question is does it make sense to make an exception for certain touch pad gestures on lock screen.
Would be great to have some input from KWin team.