ubuntu-x-swat team mailing list archive

[Aielyn <g.oberman@xxxxxxxxxxxxxxxxxx>]

Nikil, thanks. Now that I look through the diff between the last working
version and the first non-working one, I find that this is indeed where
the problem is.

Here's the relevant part of xfree86-driver-
synaptics_0.15.2-0ubuntu8_0.99.3-1ubuntu1.diff

@@ -711,11 +782,18 @@
 #endif
 			    );
     /* X valuator */
-    xf86InitValuatorAxisStruct(dev, 0, 0, -1, 1, 0, 1);
+    if (priv->minx < priv->maxx)
+	xf86InitValuatorAxisStruct(dev, 0, priv->minx, priv->maxx, 1, 0, 1);
+    else
+	xf86InitValuatorAxisStruct(dev, 0, 0, -1, 1, 0, 1);
     xf86InitValuatorDefaults(dev, 0);
     /* Y valuator */
-    xf86InitValuatorAxisStruct(dev, 1, 0, -1, 1, 0, 1);
+    if (priv->miny < priv->maxy)
+	xf86InitValuatorAxisStruct(dev, 1, priv->miny, priv->maxy, 1, 0, 1);
+    else
+	xf86InitValuatorAxisStruct(dev, 1, 0, -1, 1, 0, 1);
     xf86InitValuatorDefaults(dev, 1);
+
 #if GET_ABI_MAJOR(ABI_XINPUT_VERSION) == 0
     xf86MotionHistoryAllocate(local);
 #endif

As you'll notice, the 0.15.2 version always set the min and max values
for both axes to 0 and -1, respectively, whereas the 0.99.3 version set
it to the touchpad's values, which is the cause of the problem. The fact
that this change happened at the precise time that this problem first
started suggests that this is, indeed, the flaw.

-- 
mouse pointer no longer has 1 pixel precision
https://bugs.launchpad.net/bugs/327428
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