Asymmetric overscan prevents mouse from reaching the desktop edge
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- c, linux
- Domain
- computer-graphics, operating-systems
Research direction
Reproduce the issue on a Raspberry Pi 4 using Raspberry Pi OS Buster with FKMS enabled and the shown asymmetric overscan settings. Trace the kernel's display and pointer-boundary handling; done means the mouse can reach every edge of the desktop when left and right overscan differ.
Written by the indexing model from the issue text.
Description
Is this the right place for my bug report?
Yes, either here or firmware.
Jamesh suggested I try opening an issue here first.
Describe the bug
If left overscan and right overscan are not equal to one another, the mouse pointer will not be able to cover the entire desktop area.
To reproduce
overscan_left=190
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
Expected behaviour
Mouse pointer can move freely across the entire screen.
Actual behaviour
Mouse pointer cannot approach the right side of the screen. The closest it can get to the edge is 190px away.
System
- Raspberry Pi 4
- Latest Raspberry Pi OS Buster. Original image file version was 2019-09-26.
- FKMS is enabled.
- Firmware:
May 27 2021 14:02:15
Copyright (c) 2012 Broadcom
version 7d9a298cda813f747b51fe17e1e417e7bf5ca94d (clean) (release) (start)
- Dominant language
- C
- Stars
- 13.2k
- Forks
- 5.5k
- Avg merge
- 2d 21h
- Merged PRs (30d)
- 21
Contributor guide
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