Bug#444828: xkb-data: CapsLock-Alt_L combination doesn't work when ctrl(swapcaps) is set

[Takeshi Hakamata <tkh@cs.unm.edu>]

Package: xkb-data
Version: 1.0~cvs.20070916-1
Severity: important


If the xkb option ctrl(swapcaps) is set to make CapsLock an additional
Ctrl, CapsLock-Alt_L combination does not generate KeyPress event for
Alt_L when pressing Alt_L key.  Instead it is generated when *releasing*
the Alt_L key.  There is no problem when pressing CapsLock-Alt_R or
Ctrl_L-Alt_L.

Here is my xkb settings:

  athlon:~% setxkbmap -v
  Trying to build keymap using the following components:
  keycodes:   xfree86+aliases(qwerty)
  types:      complete
  compat:     complete
  symbols:    pc+us+ctrl(swapcaps)
  geometry:   pc(pc104)

To reproduce the problem, first do 'setxkbmap -v -option ctrl(swapcaps)'.
Then press CapsLock, and press Alt_L.  No event is generated when
pressing Alt_L.  If you release Alt_L, then both KeyPress and KeyRelease
events for Alt_L are generated at the *same* time.  See the following
xev output:

KeyPress event, serial 27, synthetic NO, window 0x3c00001,
    root 0x1a6, subw 0x0, time 198571408, (367,-23), root:(371,0),
    state 0x10, keycode 66 (keysym 0xffe3, Control_L), same_screen YES,
    XKeysymToKeycode returns keycode: 37
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 30, synthetic NO, window 0x3c00001,
    root 0x1a6, subw 0x0, time 198578840, (379,-23), root:(383,0),
    state 0x14, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 30, synthetic NO, window 0x3c00001,
    root 0x1a6, subw 0x0, time 198578840, (379,-23), root:(383,0),
    state 0x1c, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

Note that the timestamps for KeyPress and KeyRelease events are the
same.

Takeshi

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (990, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.22.9 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

-- no debconf information