Bug#423425: xserver-xorg-input-evtouch: stack corruption on touch
> On Sat, May 12, 2007 at 03:05:20AM +0200, Mattia Dongili wrote:
> > On Fri, May 11, 2007 8:51 pm, debbts@eamp.org wrote:
> > > Package: xserver-xorg-input-evtouch
> > > Version: 0.8.3-1
> > > Severity: normal
> > >
> > >
> > > There is some bug in the evtouch driver that causes X to lock up;
> > > attaching gdb remotely (or running X inside gdb) shows stack
> > > corruption with no backtrace available. It happens when I first
> > > physically touch the screen; it does not seem to happen on move. It is
> > > otherwise unpredictable -- i've had it not crash for as few as ~30ish as
> > > well more than several thousand before breaking.
>
> by the way, as the evtouch driver is the same as etch/lenny/sid, did you
> eventually notice the problem also with earlier versions of X.org?
> I've been using the driver for a long time without much problem, I just
> started having those random freezes one month ago (but I can't really
> tell if they are due to an xserver-xorg upgrade...)
This definitely didn't happen with Xorg 7.0, and I'm moderately
confident the upgrade to 7.2 is to blame -- but calibration drift
issues made me not stop using the touchscreen regularly so I can't be
confident 7.1 was crash-free.
My aptitude log implies that most of 7.2 was rolled out on 30 Apr,
with some libraries leaking in starting on 9 Apr.
I'm confident it's not kernel related.
Before 7.0 I was using the (unpackaged) usbtouch driver instead, but
I can't compare it any more because of a dramatic ABI change.
- robert jacobs
P.S. I'm currently in "desperately writing thesis mode" -- i'll try
rolling back to 7.1 using snapshot.debian.net in 3 weeks when
deadlines aren't looming over my head.
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