Ubuntu
xorg package

  1. Bug #196277
  2. Comment #105

Comment 105 for bug 196277

Revision history for this message
Bryce Harrington (bryce) wrote : Re: [hardy] keyboard layout switching shortcut doesn't work after reboot

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, X needs 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 total, 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 offer your assistance to Sergey Udaltsov.