Re: Re: Programs not accepting input?

On Monday, 27 March 2006 at 7:03:23 -0600, Sergey Babkin wrote:
Same here. As mentioned in the original message, I can use the mouse
to open a new window under firefox. The new window will accept
keyboard input, the old one won't. It's almost as if it's deadlocking
on input.

Reminder: my final question was "how do I go about debugging this
problem?".

Does it happen with any kind of programs?

No. So far I've only seen it with firefox, emacs and kklondike.

If yes, it would probably be something focus-related (and you'd be
able to see that the Focus event is not coming in).

As already mentioned, this is not the case. I've seen this kind of
problem too.

The focus management and the highlighting of the window manager
decoration are not physically connected in any way, so a bug in the
window manager might cause it to do the highlighting but forget to
give the focus to the application.

But mouse focus and keyboard focus are the same, right? The windows
respond to the mouse, but not to the keyboard.

The remainder of your reply seems to build on the assumption that
there is no focus. I'll leave it there in case I misunderstood and
you want to refer to it.

To debug that you can add debugging printout to the WM. Or I've had
a script that sort of decoded the X protocol, so if you can get the
dump of these (maybe with ktrace), you can decode the dump and see
what happens with the focus. I'll look for it in my archives.

If no, it might be something with the keyboard event translation to
keysyms/text. You can debug this by writing a test program that
would do it own dispatch loop - i.e. call XEvent() and then
XtDispatchEvent() (or some close names - I might not remember them
right), and print the debugging messages. So if you see that
XEvent() is getting events but then nothing comes out of dispatching
them, then the translation is broken somewhere.

I might be able to find this kind of a program
in my archives too, I'll look around.

thanks.

BTW, one place where the keyboard events might disappear is the
Input Method handling code. But I don't think that you run any Input
Methods.

Not explicitly.

Greg
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