[meteor2mc-devel] xawtv symptoms

[Spencer E. O. <ol...@um...>]

Marcus, I'm sending this also to the email list so that we can keep a
better record of these emails.

Attached I've got some relevant logs from the various sources.  I've
also included a processed oops file (named oopsed.out) from when xawtv
dies.

Looking through the /var/log/messages (relevant parts also included in
tar ball), you can easily see that the problem is that the highmem
buffers are being prematurly freed.  (The oops corroborates this
analysis).

The one thing that I can't seem to figure out is why there isn't other
log information in my /var/log/messages that indicates why 
via_free_himem_bufs was called.  As I looked through the source, I found
that I should expect a number of debug messages before the specific 
via_free_himem_bufs debug messages that I see.

To see where this occurs, look near the end of my messages file.  In
this log you will find that I started up xawtv, went to fullscreen mode,
then killed it (xawtv.log).  I then started it up again, went to
fullscreen mode and went out of fullscreen mode whereupon xawtv died
(xawtv-2.log).  This error seems to only occur immediately when I go out
of fullscreen mode.  

Because I can't seem to find why via_free_himem_bufs is being called by
reading the logs and source, I'm going to do this again with kdb enabled
on the machine and get a stack trace.  I just finished recompiling my
kernel with all the appropriate patches last night.  (I'm currently
running 2.4.24 and will just compiled 2.4.26 w/ kdb).

(There is another bothersome thing about when I start xawtv the first
time that it doesn't seem to work until I go into fullscreen mode.  The
second time that I start up xawtv, it works from the go, as well as in
fullscreen mode.  I'm not as worried about this bug yet as it doesn't
cause kernel oopses.)
I'll send you what I find about the stack trace that I see in kdb.  

Spencer

------------
Spencer Olson
Department of Physics
University of Michigan
Spe...@um...
tel: 734-647-9030
tel: 734-763-2544
fax: 734-764-5153

Common sense and a sense of humor are the same thing, moving at
different speeds. A sense of humor is just common sense, dancing.
-- Clive James