Workarround on LXDE, by using lxappearance and select another theme fixes the issue momentary.
uname -a Linux ablao 4.4.0-141-generic #167-Ubuntu SMP Wed Dec 5 10:40:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
lspci -nn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09)
lsb_release -r Release: 16.04
Workarround on LXDE, by using lxappearance and select another theme fixes the issue momentary.
uname -a
Linux ablao 4.4.0-141-generic #167-Ubuntu SMP Wed Dec 5 10:40:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
lspci -nn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09)
lsb_release -r
Release: 16.04