uppercase key sometimes not working

[jduns]

kubuntu 17.04. 4/5 days the shift key sometimes does not work. his issue is with only with kubuntu, not with pclinuxos or windows10. This happens within the same session. For example, I can not select more caracters by holding shift key, or I can not write brackets or question mark.
and, it's curious in clementine [and in login screen] shift key works always.
Thanks for help

duns

my keyboard logitech k120, italian

[jduns]

running xev and pressing shift left (when shift key is not working)

KeyRelease event, serial 40, synthetic NO, window 0x4400001,
  root 0x49d, subw 0x0, time 1033483, (61,-19), root:(724,41),
  state 0x1, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
  XLookupString gives 0 bytes: 
  XFilterEvent returns: False

and the code of xev when shift key is working:

KeyRelease event, serial 40, synthetic NO, window 0x4600001,
   root 0x49d, subw 0x0, time 1860940, (-535,981), root:(113,1010),
   state 0x11, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
   XLookupString gives 0 bytes: 
   XFilterEvent returns: False

[jduns]

shift key works correctly always as different user.

[GreyGeek]

shift key works correctly always as different user.

Then delete the ~/.kde directory (it's "hidden" under your home account) and logout, then log back in. Plasma will create a new ~/.kde directory. You will lose all your settings and will have to reconfigure your system tray and penal to suit yourself.

[jduns]

thank you, greekgeek! done, but not working

[GreyGeek]

mmm... Then the problem doesn't appear to be KDE. What is your keyboard setting? System Settings --> Input Devices --> Keyboards --> Hardware tab. Mine is "Generic 101-key PC"

[jduns]

my also, even italian. but i think the problem is keyboard user settings, find where are stored

[GreyGeek]

my also, even italian. but i think the problem is keyboard user settings, find where are stored

There are several keyboard layouts on the hardware tab, based on the make & model of the PC., besides the Generic. Do you find your's there?

[jduns]

that settings are identical in duns and other user, so the problem is not there, i believe. that settings have always worked, until last 6/7 days.

[GreyGeek]

Is the other user attaching remotely or using your box when you are not?

[jduns]

f.e. what about "khotkeysrc"? I delete it, and it is re-created, I empty it, and it is re-created identical. strange...

[GreyGeek]

Since you say that your user account keyboard works OK why don't you copy khotkeysrc and kglobalshortcutsrc over to your ~/.config directory and overwrite your existing files?

[jduns]

other use i am myself

[GreyGeek]

LOL!
Have you browsed /usr/share/X11/xkb/ ?

[jduns]

thank you. Done! But not working...

I don't know: compared by content with krusader the files "are identical", but it seems that system re-creates that two files at login (hour of creation is hour of login).
anyway probably the problem is not in that files.