Bug 1129967

Description of problem:
Add the following line to rhel5.11 xen guest's configure file and create the guest:
usbdevice = "tablet"

When enter into the graphical model, the mouse pointer appears to lag behind the small dot indicating the current position in the window(see attachment usbdevice_2.png).
It also doesn't work with rhel5.10 guest.

As rhel5.11 is the last rhel5 release and now at the end of  rhel5.11 release, also this bug is not a critical or regression bug, so it maybe not worth fixing it, just file it for documented purpose. 


Version-Release number of selected component (if applicable):
Guest: RHEL5.11-Server-20140731.0

Xen Host: RHEL5.11-Server-20140731.0
kernel-xen-2.6.18-398.el5
xen-3.0.3-144.el5

How reproducible:
100%

Steps to Reproduce:
1. Download rhel5.11 iso file as /root/boot.iso
2. Create raw format guest image:
# dd if=/dev/zero of=/var/lib/xen/images/hvm-5.11-64-1.img bs=1M count=1 seek=10000
3. Install the guest using the following vm configure file:
#cat hvm-5.11-64-1.cfg
name = "hvm-5.11-64-1"
maxmem = 1024
memory = 1024
vcpus = 4
builder = "hvm"
kernel = "/usr/lib/xen/boot/hvmloader"
boot = "d"
pae = 1
acpi = 1
apic = 1
sdl = 0
vnc = 1
vncunused = 1
vnclisten = "0.0.0.0"
keymap = "en-us"
on_poweroff = "rename-restart"
on_reboot = "rename-restart"
on_crash = "rename-restart"
device_model = "/usr/lib64/xen/bin/qemu-dm"
disk = ["tap:aio:/var/lib/xen/images/hvm-5.11-64-1.img,xvda,w","file:/root/boot.iso,hdc:cdrom,r"]
vif = [ "mac=00:16:36:43:73:e7,bridge=xenbr0,script=vif-bridge"]
serial = "pty"
usbdevice = "tablet"
usb=1

Actual results:
When enter into the graphical model,  the mouse pointer appears to lag behind the small dot indicating the current position in the window.

Expected results:
After the guest has been started and a new vncviewer session is established, the mouse pointer should track properly as the mouse is moved around the VNC window.

Additional info: