VBoxMouse incompatible with "SMS Virtual Mouse" driver - Pointer integration broken -> Fixed in SVN

[Jim Ramsay]

Symptoms

When Mouse Pointer Integration is enabled, the pointer moves diagonally down and right, regardless of the actual pointer movement. Sometimes the actual pointer rendered on the screen appears at the position where the host's cursor is, sometimes it appears where the guest thinks it is. Disabling "Mouse Integration" (ie, forcing the interface to capture the pointer) seems to work just fine, the pointer renders properly and works properly (can be moved in all directions).

Workaround

By disabling the "SMS Virtual Mouse" device in the Device Manager and rebooting, pointer integration started working properly again.

Suggested fix

Perhaps simply changing the VBoxMouse driver to ignore the SMS Virtual Mouse device altogether would be enough. On my system, the SMS Virtual Mouse driver has:

Manufacturer:        Microsoft SMS Solutions
Driver Version:      2.50.4136.2000

Device Instance Id:  ROOT/*SMS_MOUSE/0000
Hardware Ids:        *SMS_MOUSE

System Information

Guest: Win XP. I don't know a lot about the "SMS" software, except that is used to push software updates to the PC and apparently has some sort of remote-control facility built in which would use this virtual mouse driver.

Host: Gentoo Linux running VirtualBox 1.5.6

[sunlover]

VBoxMouse.sys driver for guest additions 2.1.x (32 bit Windows guest)

[sunlover]

The problem has been fixed in the attached VBoxMouse.sys driver.

To install the driver, right click on the VBoxMouse.inf and select 'Install', reboot the guest after installation.

The fix will be included in a future VBox version.