Welcome to the forum. Here is something you could try.
a. Open the terminal (Windows key + t)
b. Issue the command:
sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nouveau.modeset=0"
d. Save and exit nano
e. sudo update-grub
f. Restart the laptop
If your Viao has the optional AMD Radeon HD 7550 graphics card (or similar option) you may need to install the correct graphics drivers, use systemctl to disable the fallback and then try again to get the suspend and resume to work. I know this gave me troubles with a Razer Blade Stealth (2018) on Loki/Juno until I added the change to grub.
If that dosen't work, the workaround would be the following.
Go to System Settings -> Security & Privacy -> Locking
Disable the following toggle buttons:
Lock on sleep
Lock after screen turns off
Also, you could try to enable autologin as long as you do not mind the degraded level of security.
Go to System Settings -> User Accounts
Enable the following toggle button:
Log in automatically