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List:       kde-bugs-dist
Subject:    Bug#33548: kwin hang bugs 26554, 33548, 23261
From:       Jeff Pitman <bruthasj () yahoo ! com>
Date:       2001-10-19 9:15:29
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My setup does happen to be on a Toshiba Tecra 8100
running the latest crap from rh-roswell and kde.  And
it locks up whether on battery or not.

The magic combination kills everytime:

1) ALT-F1  [pull up K menu]
2) CTRL-Tab  [switch desktop]

I have not been able to extract any messages from the
X server that have to do with my particular hanging
condition.  Debugging it would be very appropriate. 
Too bad I'm working on too much other stuff...

Let me know if the above key combo kills it for you
too.  That way I won't feel so alone. :-)

Maybe it's a QT problem.  That's what half the bugs
blame it on anyway.  So, QT3/KDE3 probably fixes it. 
All I have to do is remember not to type certain key
combinations and wait for KDE3.

later.

--- Keunwoo Lee <klee@cs.washington.edu> wrote:
> Hi.  Each of you posted a kwin bug similar to the
> same kwin bug that I
> reported.  I am emailing you to see if we can put
> together a plausible
> explanation for the hangs; perhaps there is a common
> pattern.
> 
> I am noticing, for one, that the hangs only occur
> when I boot my laptop on
> battery power, then switch to outlet power, or vice
> versa.  Since Linux
> uses a test at boot time to set the length of its
> delay loop (or used to),
> and plugging in the laptop changes the CPU speed
> (via Intel's SpeedStep),
> I have a theory that my X server gets confused by
> dynamic CPU speed
> changes and sends events with oddly ordered
> timestamps.
> 
> Right now this is a crackpot theory, since I haven't
> tried to capture the
> X events during lockup or pointed my debugger at the
> kwin code responsible
> for key handling.  I'm trying to build KDE 3 so that
> I can do so.  In any
> case, the bug seems to be timing-dependent, on my
> machine.
> 
> Have any of you noticed external circumstances or
> patterns common to your
> kwin hang incidents?  Perhaps something that might
> affect your X server's
> event timing?
> 
> ~k.lee
> 
> CC:'ed to 33548@bugs.kde.org because I thought our
> discussion could go in
> the bug database.
> 
> 


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