Public bug reported:
At the power settings there is a slider for setting the "Keyboard Brightness".
My ThinkPad T460s supports three levels: off, dim, bright
With clicking and/or dragging I could move the slider to either the
left-most, center, or right-most position.
However when place the mouse cursor on top of it and use the scroll wheel, I
could not move the slider.
Same happens when I try to use the cursor keys on the keyboard.
My assumption: When using the scroll wheel or the keyboard, the slider
is moved by only a small fraction. So if the left-most position is 0%
and the right-most is 100%, it will try to increment it by 10%. It does
so, but as the only valid values are 0%, 50%, and 100%, it tries to
round it to the nearest value, which is 0%, so it jumps back to where it
was. You can see the slider briefly jump a short distance but only very
briefly, not much more than a flicker.
While I could just click/drag with the mouse to change the slider, for
some people it might be an accessibility issue and thus I believe this
should be fixed somehow.
ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: gnome-control-center 1:40.0-1ubuntu5
ProcVersionSignature: Ubuntu 5.13.0-20.20-generic 5.13.14
Uname: Linux 5.13.0-20-generic x86_64
ApportVersion: 2.20.11-0ubuntu70
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 22 19:16:07 2021
InstallationDate: Installed on 2019-11-25 (697 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to impish on 2021-10-22 (0 days ago)
** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug impish wayland-session
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https://bugs.launchpad.net/bugs/1948486
Title:
Keyboard Brightness controll not operable using keyboard or mouse
scrollwheel
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