Set the transformation matrix to the unity matrix to avoid spurious cursor

jumps (#852841)

0001-dix-set-the-device-transformation-matrix.patch

@@ -0,0 +1,32 @@
+From 171059409177652b9b7af31506dd8ee0e018330d Mon Sep 17 00:00:00 2001
+From: Peter Hutterer <peter.hutterer@who-t.net>
+Date: Thu, 20 Sep 2012 01:22:32 +1000
+Subject: [PATCH] dix: set the device transformation matrix
+
+The property handler is registered after setting the property, so
+dev->transform remains as all-zeros. That causes pixman_f_transform_invert()
+to fail (transformAbsolute()) and invert remains as garbage. In some cases,
+this may then cause a cursor jump to 0,0.
+
+Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
+---
+ dix/devices.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/dix/devices.c b/dix/devices.c
+index 46c759c..3cacbeb 100644
+--- a/dix/devices.c
++++ b/dix/devices.c
+@@ -306,6 +306,9 @@ AddInputDevice(ClientPtr client, DeviceProc deviceProc, Bool autoStart)
+     /* unity matrix */
+     memset(transform, 0, sizeof(transform));
+     transform[0] = transform[4] = transform[8] = 1.0f;
++    dev->transform.m[0][0] = 1.0;
++    dev->transform.m[1][1] = 1.0;
++    dev->transform.m[2][2] = 1.0;
+ 
+     XIChangeDeviceProperty(dev, XIGetKnownProperty(XI_PROP_TRANSFORM),
+                            XIGetKnownProperty(XATOM_FLOAT), 32,
+-- 
+1.7.11.2
+

xorg-x11-server.spec

@@ -43,7 +43,7 @@
 Summary:   X.Org X11 X server
 Name:      xorg-x11-server
 Version:   1.13.0
-Release:   4%{?gitdate:.%{gitdate}}%{dist}
+Release:   5%{?gitdate:.%{gitdate}}%{dist}
 URL:       http://www.x.org
 License:   MIT
 Group:     User Interface/X
@@ -115,6 +115,10 @@ Patch7053: 0001-scan-pci-after-probing-devices.patch
 
 Patch7054: 0001-config-udev-ignore-change-on-drm-devices.patch
 
+# Bug 852841 - Mouse jumps to edges / corners when using an absolute input
+# device (ie virtual machine usb tablet)
+Patch7055: 0001-dix-set-the-device-transformation-matrix.patch
+
 %global moduledir	%{_libdir}/xorg/modules
 %global drimoduledir	%{_libdir}/dri
 %global sdkdir		%{_includedir}/xorg
@@ -587,6 +591,10 @@ rm -rf $RPM_BUILD_ROOT
 %{xserver_source_dir}
 
 %changelog
+* Thu Sep 20 2012 Peter Hutterer <peter.hutterer@redhat.com> 1.13.0-5
+- Set the transformation matrix to the unity matrix to avoid spurious cursor
+  jumps (#852841)
+
 * Fri Sep 14 2012 Dave Airlie <airlied@redhat.com> 1.13.0-4
 - fix bug when hotplugging a monitor causes oops