I just uninstalled Sophos and all my freezing and hanging issues solved.
Thankful to Seth Arnold(seth-arnold) for solving my issue.
Thanks again
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https://bugs.launchpad.net/bugs/1804076
Public bug reported:
I recently reported but now im having this issue on wayland as well
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7.1
ProcVersionSignature: Ubuntu 4.15.0-39.42-generic 4.15.18
Uname: Linux 4.15.0-39-generic x86_64
NonfreeKernelModules: talpa_vfshook