Key modifier issue with Qt5
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Hi,
I have a problem for all application relying on Qt5 on my computer: all keyboard input are without modifier: no way to use capital letter or the numerical keyboard for example. Shift, control, ALtGr, caps-lock or num-lock are all without effect.
The bug can be reproduced with a minimalist application in PyQt5, Pyside2 or in plain C++/Qt5.All other application running Qt6, GTK, ... or basic X11 application have no such issue and the keyboard is working as expected.
More puzzling, the computer has two "seats" under linux, this means there are two GPU, keyboards, mouse, ... and the system is configured to have two users using simultaneously the computer. The bug is occurring only on one of the seat and not on the other. Both are running the XFCE desktop environment.
I also tried to create a new/fresh user without any configuration file and it sees the same bug.
I did run the minimalist Qt5 program under "strace" but I did not figure out which library/configuration could be problematic (I could share those files if needed). Is there an equivalent of "xev" to inspect the key-stroke at the Qt5 level ?
Thanks for your help,
Jérôme
-
Hi,
I have a problem for all application relying on Qt5 on my computer: all keyboard input are without modifier: no way to use capital letter or the numerical keyboard for example. Shift, control, ALtGr, caps-lock or num-lock are all without effect.
The bug can be reproduced with a minimalist application in PyQt5, Pyside2 or in plain C++/Qt5.All other application running Qt6, GTK, ... or basic X11 application have no such issue and the keyboard is working as expected.
More puzzling, the computer has two "seats" under linux, this means there are two GPU, keyboards, mouse, ... and the system is configured to have two users using simultaneously the computer. The bug is occurring only on one of the seat and not on the other. Both are running the XFCE desktop environment.
I also tried to create a new/fresh user without any configuration file and it sees the same bug.
I did run the minimalist Qt5 program under "strace" but I did not figure out which library/configuration could be problematic (I could share those files if needed). Is there an equivalent of "xev" to inspect the key-stroke at the Qt5 level ?
Thanks for your help,
Jérôme
@kif38 said in Key modifier issue with Qt5:
The bug can be reproduced with a minimalist application in PyQt5, Pyside2 or in plain C++/Qt5.
Post one below.
I assume it's related to your (very special) system and not a general bug in Qt5.
If this would be a general bug in Qt5 affecting all keyboard modifiers, it would have been fixed long time ago.What exact system do you have there?
What version of Qt5 are you using?
