I believe the most serious objection with this request is that it
violates the XKB specification (see the description of SA_LockGroup in
section 6.3 of "The X Keyboard Extension: Protocol Specification").
In the same specification, in section 4.0 of appendix D ("Protocol
Encoding"), we see in the description of SA_LockGroup that there are
still 5 unused bits in the flags field. My proposal in to use one of
these bits decide whether to lock groups on press or release. By
default (bit is zero), lock groups on press as the protocol
specification demands. If the flag is one, lock groups on release. So
by default, we would conform to the specification, and add the
alternative behaviour as a new possibility beyond the specification.
There are some usage implications. One must use 'Private' do create
actions with the new flag set (until xkbcomp is updated as well), and
one needs support in xkeyboard-config to make the new feature usable for
non-XKB-hackers.
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https://bugs.launchpad.net/bugs/36812
Title:
Keyboard layout change on hotkeys press instead of release and do not
work well with shortcuts
Status in GNOME Control Center:
Unknown
Status in X.Org X server:
In Progress
Status in “control-center” package in Ubuntu:
Invalid
Status in “xorg-server” package in Ubuntu:
Fix Released
Bug description:
This is a bug about shortcuts mapped to combinations which include
each other.
For example, if we have Ctrl+Shift (for keyboard layout) and Ctrl+Shift+N (to
open a new terminal), then we are practically unable to use the second
shortcut; this is what happens:
Ctrl press (nothing happens)
Shift press (keyboard layout change)
N (a simple N appears, since a shortcut has already fired)
The expected behavior is to fire shortcuts on the release (not on
press) of the special keys (ctrl,shift,alt, etc) which is also how
Windows behave. This is a serious problem for bilingual layouts,
typically using Alt+Shift or Ctrl+Shift for keyboard layout change.
For users being affected by this problem, the easiest solution for now is to
add this PPA in your repositories:
https://launchpad.net/~oded-geek/+archive/xorg-patches
Practical summary of this bug for ubuntu developers (since reading 120
comments is impractical for most):
This problem is a really old (since 2004) issue of the xkb part of xorg; the
main discussion was made upstream in freedesktop-bugs #865. There has been a
patch from Ilya Murav'jov for upstream (#55), and attached here (#61).
Upstream xorg has refused to apply the patch, mainly because it "explicitly
contradicts the (xkb) spec" (#84, #91).
This patch has been reported to work for many people without any problems,
and there is also a PPA by Oded Arbel (#95) where he maintains a patched
version of the ubuntu xorg.
The proper resolution of this bug would be to apply this patch to the
upstream xorg, or at minimum to the official ubuntu xorg package.
To manage notifications about this bug go to:
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