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List:       kde-core-devel
Subject:    Re: Kwin freezes
From:       Rik Hemsley <rik () kde ! org>
Date:       2000-05-30 10:35:59
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#if Simon Hausmann
> On Tue, 30 May 2000, Matt Koss wrote:
> > 
> > For over a week I experience a strange bug.
> > When I close the last window on the desktop, kwin freezes.
> > I have to quit X immediately( or kill kwin from outside ), because otherwise 
> > it locks my PC completely.
> > 
> > That last  application quits properly, but in the place of the last window 
> > kwin leaves a grey rectangle.
> 
> I'm experiencing exactly the same problem. As far as I debugged/tested it
> I think that kwin segfaults somewhere. This results in drkonqi to be
> called, which tries to open up a new window. Oooops, a new window, and
> kwin is semi-dead? -> freeze [...]

I don't get this problem, but I saw something similar while I was fixing
code in kwin/workspace.cpp to make sure that when only one window
existed it got focus. I made sure it didn't happen before I checked in
the code.

Here's the relevant code, in case someone can see something wrong
with it. It's supposed to iterate backwards through 'focus_chain',
looking for a visible client. If it finds one, it requests focus for it
and drops out.

if (!block_focus &&
    options->focusPolicyIsReasonable() &&
    !focus_chain.isEmpty())
{  
  ClientList::ConstIterator it = focus_chain.fromLast();  
  do {
    if ((*it)->isVisible()) {
      requestFocus(*it);
      break;
    }
    it--;
  } while (it != focus_chain.begin());
}

Rik

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