AltGr not working with "Keyboard synchronized" = off

[pmarek]

With the current xpra 0.0.7.32 and "Keyboard synchronized" unchecked the key bindings using AltGr don't work anymore.

Here's xev with k-s checked:

KeyPress event, serial 30, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2809973731, (409,199), root:(413,222),
    state 0x0, keycode 108 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XKeysymToKeycode returns keycode: 92
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 30, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2809974060, (409,199), root:(413,222),
    state 0x80, keycode 53 (keysym 0xab, guillemotleft), same_screen YES,
    XLookupString gives 2 bytes: (c2 ab) "«"
    XmbLookupString gives 2 bytes: (c2 ab) "«"
    XFilterEvent returns: False

KeyRelease event, serial 30, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2809974062, (409,199), root:(413,222),
    state 0x80, keycode 53 (keysym 0xab, guillemotleft), same_screen YES,
    XLookupString gives 2 bytes: (c2 ab) "«"
    XFilterEvent returns: False

with k-s unchecked:

KeyPress event, serial 44, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2810010702, (238,217), root:(246,263),
    state 0x0, keycode 108 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XKeysymToKeycode returns keycode: 92
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 44, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2810010702, (238,217), root:(246,263),
    state 0x80, keycode 108 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XKeysymToKeycode returns keycode: 92
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 44, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2810011346, (238,217), root:(246,263),
    state 0x0, keycode 53 (keysym 0x78, x), same_screen YES,
    XLookupString gives 1 bytes: (78) "x"
    XmbLookupString gives 1 bytes: (78) "x"
    XFilterEvent returns: False

KeyRelease event, serial 44, synthetic NO, window 0xa00001,
    root 0xfd, subw 0x0, time 2810011346, (238,217), root:(246,263),
    state 0x0, keycode 53 (keysym 0x78, x), same_screen YES,
    XLookupString gives 1 bytes: (78) "x"
    XFilterEvent returns: False

[pmarek]

I'm pressing AltGR+x - see the above key numbers.

[Antoine Martin]

workaround for altgr modifier mapping

[Antoine Martin]

The patch above works, but this is not the correct solution: we now have modifier mappings available (at least in xposix), so we should generate the modifier map from those.

[Antoine Martin]

much better solution which detects "nuisance" keys

[Antoine Martin]

r394 (see the long changelog message for details) contains the proper fix for this, also ensures that capslock and numlock are properly synchronized.

Please confirm that this works for you and that this does not cause regressions when connecting to/from older versions.

[pmarek]

Hmmm, at least connecting _to_ an "old" version (latest package, ie. 0.0.7.32-1) with r395 makes AltGr _dead_ - neither with nor without keyboard synchronized it does anything.

[Antoine Martin]

Let's make this more interesting by introducing some new factors into the equation:

• win32 sends us a Num_Lock key press, but it is never reported as a modifier
• win32: caps now needs to be added to the list of keys we report
• osx: not sure about the numlock key, seems to come up as Escape keyval=65307
• osx also tries to be too clever and only sends one event for the capslock key: key-up or key-down to tell us if caps is on, rather than the raw key events we want...

[Antoine Martin]

useful tool for seeing what the keyboard is doing

[Antoine Martin]

much better patch which implements raw keycodes for all platforms

[Antoine Martin]

r417 should work and supports all platforms I tested: Ubuntu 10.04, Ubuntu 11.10, Fedora, Windows XP, Mac OS X, OpenBSD...
Both with and without "--no-keyboard-sync"

Please let me know if I can close this ticket.

[pmarek]

Testing 0.7.33:

With "keyboard synchronized" = unchecked the key repeat bug does no longer happen; with that checked I see the unwanted repetitions.

Thanks a lot!

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/62