The biggest issue is that after lock screen the keyboard is unresponsive or does not appear to be working. It also happened if the OS goes to suspend after a while, then I am greeted by the log-in screen. To workaround the issue I hit change user, then select the onscreen keyboard and as soon as I hit a key then the laptop keyboard starts working again. The other workaround is choosing to reboot the system as it has never happened after booting.
I’ve made a lot of search on this issue and have tried many recommended solutions with similar issues:
sudo apt remove fwupd did not worked.
and another "fix"involving the grub but couldn’t find it again to paste here.
Any help appreciated. thanks
Laptop: Sony Vaio Model: sve15125cxs
OS: Ubuntu Mate. Previously: Ubuntu 16.04