** Changed in: ubuntu
Status: Invalid => Confirmed
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https://bugs.launchpad.net/bugs/251443
Title:
[Needs xkb protocol rework] keyboard layout switching shortcuts like
Alt+Alt do not work anymore
Status in Ubuntu:
Confirmed
Status in xorg-server package in Ubuntu:
Invalid
Bug description:
Binary package hint: xorg
(Bug #196277 used to cover two separate but similar looking bugs. We
split them now, and here we describe one of the two bugs. The other
bug has to do with autologin, which when enabled, ignores any keyboard
layout settings that have been configured in GNOME, the graphical
interface).
In the keyboard layout preferences, you can set "Both alt keys
together change layout", which worked in Gutsy for toggling between
keyboard layouts.
Currently:
* "both alt keys..." does not toggle keyboard layouts
* "both ctrl keys..." does not toggle keyboard layouts
* "both shift keys..." works fine
* "Alt+shift" works fine
Steps to reproduce it are:
* Visit System->Preferences->Keyboard-Layouts
* Press Add and add a new layout.
* Close preferences.
* Open Text Editor or whatever you want and write something with Double-Alts
it switch layout and writes with the other layout
OK till now.
* Reboot.
* Open a text editor and try to switch layout... Boom! It doesn't work!
Temporary Workaround. Open Layouts again and remove/add the second
layout to start working again.
another workaround using a script:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/196277/comments/60
The text in the applet will change, to make it appear to be setting the
correct layout, but the changes do not take effect.
Actually shortcut doesn't work at all, I set to be alts toggle in keyboard
preferences, and it doesn't work, another thing is that even with keyboard
indicator applet you change language, it doesn't changes, name in the applet
changes, but it doesn't work. I need to open keyboard preferences, layout
options, remove the tick and then put it back on keyboard layout switching
shortcut.. As I said, shortcut doesn't work after this, but applet starts to
change the layout, not only letters on itself.
This issue has been sufficiently confirmed. Please do not comment on
this bug unless you have some information that will help solve the
bug.
[Background]
Both Canonical and upstream are aware of this issue and consider it of high
importance. Unfortunately, the root cause is not something that can be easily
fixed.
The issue is that to solve this problem, we need to have a way to save
the ExplicitVModMapMask, which is tracked okay in memory but not when
the configuration is passed via XKM binary files, because the XKM
binary file format simply doesn't have a field for storing the
VModMask flag data. The XKM file format allows only 8 flags to be set,
and there are already 8 defined. See the upstream bug report for
details: https://bugs.freedesktop.org/show_bug.cgi?id=4927
Upstream's proposed solution to the problem is to remove the xkbcomp
design and the xkm file format entirely, and switch to new X input
technologies. This will be a fairly sizeable re-architecting effort,
and will take time to complete. If you would like to help contribute
to this solution for this problem, please work with Sergey Udaltsov.
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