Recently i have had the issue of strange artifacts after sleep mode. I ve updated my NVIDIA driver as stated in Strange artifacts along window borders after waking computer from sleep mode and all seem to work out.
I no longer have the issues around the windows but Viber seems to still be affected. The profile pictures and pics inside a chat are still acting weird!
Is there any more i can do or it's just the bug not fully fixed?
Please restart compiz with:
compiz --replace
It worked for me. If it does not work, install the latest Nvidia driver "nvidia-381" which fixes the issue, you may not find it within standard repositories so please add it from a PPA :
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt update
sudo apt purge nvidia*
sudo apt install nvidia-381
After this please reboot your computer and check if problem is gone.
I hope it helps.
