Thanks a lot for the hint.
At least on my system (Sony Vaio VPCZ1 with AMD/Intel Hybrid Graphics) replacing xserver-xorg-input-evdev with the version from : https://launchpad.net/~sarvatt/+archive/sru1/+build/3118994 does indeed fix the issue.
Thanks a lot for the hint.
At least on my system (Sony Vaio VPCZ1 with AMD/Intel Hybrid Graphics) replacing xserver- xorg-input- evdev with the version from : https:/ /launchpad. net/~sarvatt/ +archive/ sru1/+build/ 3118994 does indeed fix the issue.