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List:       freedesktop-xorg
Subject:    Re: Problem with X&xbindkeys(xgrabkey). Buffer overflow?
From:       ENRIQUE ARIZON BENITO <enrique.arizonbenito () gmail ! com>
Date:       2010-12-20 11:16:58
Message-ID: AANLkTi=_G2Ov+0VMG+nDb2J=v=UxfAtD3FZzdBOGSAS2 () mail ! gmail ! com
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I couldn't find any time to dig deeper into the problem, and since I'm
not an expert in the X I'm afraid it would take me lot of time and
efforts.

The strace output was not very informative and setting up X for
debugging was really troublesome since I'm using a debian based system
and apt forced to upgrade quite a lot of packages that I can't afford
at this moment.

All I found is that the random error is associated with a particular
hardware in my system. When the key pressed is associated with an
script that directly or indirectly triggers an "write output" to the
usb2serial device (based on a pl2303 chipset) the problem randomly
arise. It doesn't repeat in any other circumstance, just when sending
data out to the /dev/ttyUSB0 (pl2303 usb2serial) device.

For now, I solved the issue ussing a custom C program that directly
reads to /dev/input/event"N" completly bypassing the X system.
(For anyone interested I used a custom modifyied version of logkeys
-http://code.google.com/p/logkeys/-. It also has the advantage of
beeing able to differentiate between different input devices, while
the disadvantage of beeing more "linux-centric")

Regards,

Enrique


On Fri, Dec 3, 2010 at 2:07 AM, Pat Kane <pekane52@gmail.com> wrote:
> On Thu, Dec 2, 2010 at 3:23 AM, ENRIQUE ARIZON BENITO wrote:
>  > Still I don't known if that really has anything to do with the infinte
>  > random loop I observe.
>
> When your X server gets stuck  connect to the X process with gdb
> step  through procedure calls.   I'd also run "strace" on the X process.
>
> Adam Jackson (ajax) submitted a bug fix a while back that might interesting:
>
>        http://patchwork.freedesktop.org/patch/1703/
>
> Pat
> ----
>
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