https://bugs.kde.org/show_bug.cgi?id=318904
--- Comment #27 from h.goe...@crazy-compilers.com --- I dug into the code and made the following observations: When the keymap is changed, xev reports an "MappingNotify event MappingKeyboard". kglobelaccell has a method KGlobalAccelImpl::x11MappingNotify() [1], which I assume is handling this event. x11MappingNotify seams to recalculate g_keyModMaskXOnOrOff by calling (in calculateGrabMasks) [2]. calculateGrabMasks() calls (among other) KKeyServer::modXNumLock(), which calls initializeMods() [4] and this does a bit of magic: initializeMods() searches the whole kxb keymapping for XK_Num_Lock, which is the "NumLock" symbol. Only if this symbol is found in the current keymap, NumLock is taken as a "valid" modifier for this keymap. My theory was that mapping any key to "NumLock" could solve the issue. When I tried to proof this, I failed (see below). Then I found that initializeMods() seems to be only called *once* at all. initializeMods() sets a global flag (g_bInitializedMods) which is never reset. So another solution could be to reset g_bInitializedMods in KGlobalAccelImpl::x11MappingNotify(). But on the other hand: If my analyzis above is correct, then at start up (while de(nodeadkeys) was active) initializeMods() would have accepted NumLock as a modifier to be filtered. And this would not have been changed then switching to de(neo). Could please some developer point me to a how-to quickly compile an run a developement-version of kglobalaccel? Then I could try digging deeper into the issue and try Thomas' fix from Comment 23. Failed proof: setxkbmap -layout de -variant neo # search an unused keycode (for me 254 worked) xmodmap -pke | grep -E '=$' # start ev to see the notify events xev & # assign NumLock to this keycode, this should send an MappingNotify event xmodmap -e "keycode 120 = Num_Lock" # verify xmodmap -pke | grep 254 [1] https://github.com/KDE/kglobalaccel/blob/v5.22.0/src/runtime/plugins/xcb/kglobalaccel_x11.cpp#L216 [2] calculateGrabMasks: https://github.com/KDE/kglobalaccel/blob/v5.22.0/src/runtime/plugins/xcb/kglobalaccel_x11.cpp#L49 [3] initializeMods: https://github.com/KDE/kdelibs/blob/v4.14.3/kdeui/util/kkeyserver_x11.cpp#L647 [3] initializeMods: https://github.com/KDE/kdelibs/blob/v4.14.3/kdeui/util/kkeyserver_x11.cpp#L498 -- You are receiving this mail because: You are watching all bug changes.
