Peter,
Though it looks like already obsolete, I've reposted the patch following -
hopefuly - the guidelines...
Bruno
Le jeudi, février 24, 2011 06:27:31, vous avez écrit :
> On Sun, Feb 20, 2011 at 02:21:52PM +0100, Bruno Vasselle wrote:
> > I've had a problem with the "Bamboo Touch and Pen" on my laptop : the
> > pointer sticks to right edge of the screen and never responds to changes
> > in horizontal direction. The X log shows absurd negative X dimensions
> > in messages that state about "top X=.... top Y=... bottom X=... bottom
> > Y=... resol X=... resol Y=...".
> >
> > It appears that the driver faces a division by zero when trying to deal
> > with the "KeepShape" option on that computer. The fields
> > "priv->maxWidth" and "priv->maxHeight" are both set to 0 - don't ask me
> > why - making it impossible to assess the screen ratio.
> >
> > I've patched (attached) to detect and disable KeepShape in the situation.
> > This does not solve the problem, which is somewhere else, but makes
> > however the driver more robust, removing an option when it cannot
> > possibly deal with.
> >
> > Bruno
> >
> > NB
> >
> > Augmenting the debuging level in X configuration (50-wacom.conf: Option
> > "DebugLevel" "100"), without any modification to the source, shows
> > something
> >
> > like :
> > screenRatio = -nan, tabletRatio = 1.6
> >
> > diff --git a/src/xf86Wacom.c b/src/xf86Wacom.c
> > index e8c4710..5cdb300 100644
> > --- a/src/xf86Wacom.c
> > +++ b/src/xf86Wacom.c
> > @@ -116,6 +116,14 @@ static int wcmInitArea(InputInfoPtr pInfo)
> >
> > /* Maintain aspect ratio to the whole desktop
> >
> > * May need to consider a specific screen in multimonitor settings
> > */
> >
> > + if ((priv->flags & KEEP_SHAPE_FLAG) &&
> > + (priv->maxHeight == 0)) /* safeguard in case screen ratio is
> > unknown */ + {
> > + xf86Msg(X_WARNING,
> > + "%s: disabling option \"KeepShape\" as screen shape is
> > not
> > accessible\n", + pInfo->name);
> > + priv->flags &= ~KEEP_SHAPE_FLAG;
> > + }
> >
> > if (priv->flags & KEEP_SHAPE_FLAG)
> > {
>
> Thanks, looks good. can you please send this as signed-off, git formatted
> patch so we can easily apply this patch? thanks.
> https://sourceforge.net/apps/mediawiki/linuxwacom/index.php?title=Submittin
> g_Patches
>
> Cheers,
> Peter
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