Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-settings-daemon (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1215463
Title:
"Disable while typing" should disable cursor movement
Status in System76:
Fix Committed
Status in “gnome-settings-daemon” package in Ubuntu:
Confirmed
Bug description:
On a modern laptop with a large touchpad/clickpad, your palms tend to
brush the touch surface as you type. The problem is that on Ubuntu,
this creates an annoying amount of cursor wiggle. Competing platforms
don't have this problem, so this needs to be improved on Ubuntu.
Part of the problem is that `xserver-xorg-input-synaptics` driver
doesn't do effective palm detection (it seems), and part of the
problem is that `gnome-settings-daemon` launches `syndaemon` such that
it *never* disables cursor movement.
Currently syndaemon is launched like this:
syndaemon -i 1.0 -t -K -R
The "-t" option tells syndaemon to never block cursor movement. It
will only block accidental vertical scrolling (which is darn near
impossible to do on a modern system with two finger scrolling), and
block accidental tap-to-click (which seems unlikely something you can
do by mistake with your palms). So from a user perspective, "Disable
while typing" currently does nothing.
I'm proposing that syndaemon instead be launched like this:
syndaemon -i 0.5 -K -R
Without the "-t" option, syndaemon will block cursor movement,
vertical scrolling, and tap-to-click. And the "-i 0.5" means it will
block it for 500ms (half a second).
System76 has been shipping a patched `gnome-settings-daemon` (Raring)
on all our products for the last two months, and we've received no
support issues about it (if this caused noticeable usability issues,
I'm confident we'd have heard about it).
We've also done a lot of testing and tuning on the timeout threshold,
and 500ms seems like about the sweet spot. It's long enough to be
decently effective for most typists, but not so long that the user
will catch the trackpad still disabled when they move from typing back
to "cursoring" :P
Note that this isn't a prefect solution, and you really can't do this
especially well with a static timeout anyway (would be better to be
dynamic based on typing speed). For slow typists, 500ms often isn't
long enough. But for now, I feel it's better to find that sweet spot
where it at least gives some improvement for most users, without
causing any negative impact for any users.
I have a Saucy package available for testing here:
https://launchpad.net/~system76-dev/+archive/daily?field.series_filter=saucy
And the proposed branch here:
https://code.launchpad.net/~jderose/ubuntu/saucy/gnome-settings-daemon/tune-syndaemon2
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-settings-daemon 3.6.4-0ubuntu16
ProcVersionSignature: Ubuntu 3.11.0-3.7-generic 3.11.0-rc6
Uname: Linux 3.11.0-3-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.1-0ubuntu2
Architecture: amd64
Date: Thu Aug 22 07:35:33 2013
MarkForUpload: True
SourcePackage: gnome-settings-daemon
UpgradeStatus: No upgrade log present (probably fresh install)
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