Can't login after lock screen (black screen)

[Enrique Strada Morales]

When I upgrade from ubuntu 17.04 to Ubuntu 17.10 I have had problems with lock screen and sleep mode

After locking screen and as a result the monitor going into sleep mode, I can't get the login screen anymore, the monitor stays in sleep mode forever.

In previous Ubuntu versions after pressing any key or the mouse, the login screen showed up, but not anymore. I have to restart the computer.

this is my laptop details

Laptop HP-Pavilion
Memory: 11.2 GiB
Procesor: AMD A9-9410 radeon r5, 5 compute cores 2c+3g x 2
Graphics: AMD Stoney
GNOME: 3.26.2
OS Type: 64-bit
Disk 971.3 GB

[Khurshid Alam (khurshid-alam)]

what is your power settings? You can check from settings-> Power.

[Enrique Strada Morales (hck2600)]

hi this is what I have:
Automatic suspend - off
When the power Button is pressed - Power off

Aditional in my Tweaks Gnome in Power I have this
Suspend when laptop lid is closed - off

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]