I have a Dell Vostro 15 3568 with Ubuntu 18.04.3 which starts blinking after
the system gets locked and I want to unlock it again.
I just completed the fresh installation.
Sometimes, the blinking stopped after I tried to guess the screen while blinking and enter the password and sometimes it...
I could do all the things but as I told you that UEFI was on AHCI was On and I try Ubuntu also and then I used something else option and got error: no device as partitioned as legacy mode
Just to increase space for projects and as default SSD was on secondry connection and HDD was connected as primary that was only worked with Ubuntu 18.04 but I need to install OS on SSD to get good speed.