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[Aisano <info@xxxxxxxxxxxxxxxxx>]

I downloaded the source code for gnusound-0.7.5 a couple of days ago but
could not get it to build because I lacked too many source packages it
depends on, and could not find a list of dependencies. But I can see
that in line 797 of draw.c there is still that constant 128 mentioned by
Jon Hornstein, while the really available size is only 8 (bytes). The
condition on "have_room_for_text" (see Jon's contribution above) may
explain why not everybody is experiencing this problem.

Still it is somewhat strange, because the number printed into this 8
byte buffer is bounded by something called "...mixer->output_channels".
It would indeed be weird for a sound card to have so many output
channels that their number would exceed 7 digits (plus a terminating
\0). Maybe the problem is somewhere else. But the wrong buffer length
passed to snprintf has to be fixed anyway (using "sizeof(s)" instead of
"128). To be entirely on the safe side (here) the buffer "s" might be
increased to 12 bytes, so any (even negative) 32-bit integer cannot
overflow it. Still it has to be explained how the number of output
channels can exceed the amount of 10 million. While we do not know this
it may even be the safest thing to put a plausibility check into the
code.

As I can reproduce the problem on my hardware, I am willing to perform
some tests if somebody can give me clear instructions how to compile the
code. After downloading a couple of codec packages I still receive this
message from "configure":

checking ffmpeg/avformat.h usability... no
checking ffmpeg/avformat.h presence... no
checking for ffmpeg/avformat.h... no
configure: error: *** no suitable file drivers found ***

No idea what I need to install to make these go away.

-- 
gnusound crashes X session immediately on launch (Affects Intrepid, Jaunty, Karmic)
https://bugs.launchpad.net/bugs/282939
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which is subscribed to nvidia-graphics-drivers-180 in ubuntu.