Public bug reported:

My PC has a bt878 based TV card.  When I run KDETV mostly things are OK.
I can switch channels  and close the application at will.

However sometimes the application refuses to close or when it closes I
still hear the TV audio playing.  Generally this implies that the KDETV
is not stopped properly.  However when I do a ps -ax to find the KDETV
application the command does not complete and hangs halfway through its
output.  The ps -ax does not respond to CTRL-C and the only thing you
can do is close the konsole in which it was started.

This causes more problems later on when I want to shutdown the system as
the shutdown procedure wants to kill running processes by issuing a ps
to find them.  As a consequence I generally need to hard-powerdown my
PC.

This situation does also occur in the edgy version but I have the
impression, less frequently.

** Affects: Ubuntu
     Importance: Undecided
         Status: Unconfirmed

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lockup in linux 2.6.20 kernel
https://launchpad.net/bugs/81110

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