Okay I just tried changing the mouse polling thinking that might help. It did not help with this particular problem in Ryzom.
By the way to change mouse polling in Ubuntu:
sudo nano /etc/modules (nano or the editor of your choice, for gui gedit)
-r usbhid
usbhid mousepoll=n
Then reboot.
n Legend:
1 = 1000Hz
2 = 500Hz
4 = 250Hz
8 = 125Hz
10 = 100Hz (Default)
You can test that you have done this correctly by: cat /sys/module/usbhid/parameters/mousepoll
By the way to change mouse polling in Ubuntu:
sudo nano /etc/modules (nano or the editor of your choice, for gui gedit)
-r usbhid
usbhid mousepoll=n
Then reboot.
n Legend:
1 = 1000Hz
2 = 500Hz
4 = 250Hz
8 = 125Hz
10 = 100Hz (Default)
You can test that you have done this correctly by: cat /sys/module/usbhid/parameters/mousepoll