[Bug 2047989] [NEW] Sticky Keys accessibility feature ctrl-shift behaves differently from ctrl-alt; ctrl-shift causes both to get stuck on

[Nico Williams]

Public bug reported:

(Sticky Keys is an accessibility feature.  Settings->Typing Assist
(AccessX)->Sticky Keys.  Sticky Keys is not just for the disabled!
Sticky Keys is a feature that helps prevent or attenuate repetitive
stress injuries (RSI) by helping the user avoid problematic "deviations"
of the hand/wrist/fingers.  I use Sticky Keys to prevent RSI.  I don't
always use Sticky Keys as intended -- sometimes I press and release
modifier keys as intended, sometimes I hold them down, and this is
really a matter of training, but also that combinations which do not
hurt are combinations I'm willing to hold rather than press and
release.)

With `Disable if two keys are pressed together` disabled, the way sticky
keys is supposed to work is that I should be able to hit and hold one or
more modifier keys and then some non-modifier key, and it should work as
if sticky keys were disabled (assuming none of the modifier keys had
been hit and released just before)[*], however when the two modifier
keys are ctrl and shift (or maybe just when one of them is shift?) the
modifier keys are then stuck on, as if each of them had been pressed and
released twice.  This does not happen when using, say, ctrl and alt.
I've not checked all modifier key combinations, so do please check for
others.

Note that I can't tell what package delivers Sticky Keys, therefore I
might be opening this bug under the incorrect package.  It might be
gnome-desktop, or who knows what.  It's not always easy for users to
tell.

[*] This is technically a misuse of sticky keys, but the reason `Disable
if two keys are pressed together` is configurable is that sticky keys is
a feature one need not use correctly all the time!

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-desktop 1.481.1
ProcVersionSignature: Ubuntu 6.1.0-1027.27-oem 6.1.61
Uname: Linux 6.1.0-1027-oem x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan  3 19:59:39 2024
SourcePackage: ubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.logrotate.d.apport: [modified]
mtime.conffile..etc.logrotate.d.apport: 2023-11-28T00:59:18.000120

** Affects: ubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy wayland-session

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https://bugs.launchpad.net/bugs/2047989

Title:
  Sticky Keys accessibility feature ctrl-shift behaves differently from
  ctrl-alt; ctrl-shift causes both to get stuck on

Status in ubuntu-meta package in Ubuntu:
  New

Bug description:
  (Sticky Keys is an accessibility feature.  Settings->Typing Assist
  (AccessX)->Sticky Keys.  Sticky Keys is not just for the disabled!
  Sticky Keys is a feature that helps prevent or attenuate repetitive
  stress injuries (RSI) by helping the user avoid problematic
  "deviations" of the hand/wrist/fingers.  I use Sticky Keys to prevent
  RSI.  I don't always use Sticky Keys as intended -- sometimes I press
  and release modifier keys as intended, sometimes I hold them down, and
  this is really a matter of training, but also that combinations which
  do not hurt are combinations I'm willing to hold rather than press and
  release.)

  With `Disable if two keys are pressed together` disabled, the way
  sticky keys is supposed to work is that I should be able to hit and
  hold one or more modifier keys and then some non-modifier key, and it
  should work as if sticky keys were disabled (assuming none of the
  modifier keys had been hit and released just before)[*], however when
  the two modifier keys are ctrl and shift (or maybe just when one of
  them is shift?) the modifier keys are then stuck on, as if each of
  them had been pressed and released twice.  This does not happen when
  using, say, ctrl and alt.  I've not checked all modifier key
  combinations, so do please check for others.

  Note that I can't tell what package delivers Sticky Keys, therefore I
  might be opening this bug under the incorrect package.  It might be
  gnome-desktop, or who knows what.  It's not always easy for users to
  tell.

  [*] This is technically a misuse of sticky keys, but the reason
  `Disable if two keys are pressed together` is configurable is that
  sticky keys is a feature one need not use correctly all the time!

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-desktop 1.481.1
  ProcVersionSignature: Ubuntu 6.1.0-1027.27-oem 6.1.61
  Uname: Linux 6.1.0-1027-oem x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jan  3 19:59:39 2024
  SourcePackage: ubuntu-meta
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.logrotate.d.apport: [modified]
  mtime.conffile..etc.logrotate.d.apport: 2023-11-28T00:59:18.000120

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