[kmail2] [Bug 326493] New: kmail working but completely unresponsive to user input

[Florian Schanda]

https://bugs.kde.org/show_bug.cgi?id=326493

            Bug ID: 326493
           Summary: kmail working but completely unresponsive to user
                    input
    Classification: Unclassified
           Product: kmail2
           Version: unspecified
          Platform: Debian stable
                OS: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: UI
          Assignee: kdepim-bugs at kde.org
          Reporter: florian at schanda.org.uk

We are seeing a *very* strange problem. We have a number of identical computers
with identical KDE setups from Debian stable.

On one of them, every once in a while kmail stops responding to user input. It
has *not* crashed. For example it responds to dbus messages, and the automatic
mail check still works (and the user interface is redrawn). However any user
input (keyboard, mouse both movement and clicking) is simply not processed, as
if it was never sent to the window in question. Other kde and non-kde
applications (for example emacs) on that system work fine.

Clicking the "close window" button in the title brings up the "this application
is not responding, would you like to kill it" message.

I have never seen anything like it and am at a loss of what to do and how to
start debugging this problem. We have tried to identify differences in the
setup/usage for that user and came up with two things:
   a) they use focus-follows-mouse
   b) they sometimes login from another computer

W.r.t. (a) we have disabled focus-follows-mouse and the problem still persists.

On (b), they sometimes log in from a different computer and have ignored the
message "there is already a running instance of kmail". I thought we eliminate
this by making sure no kmail or related kio processess are running and then
starting kmail again. Again, the problem still persists.

We have recently tried deleting all config in .kde relating to kmail, but the
problem still persists.

Do you have any idea what is going on?

Thanks,
   Florian

Reproducible: Always

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