After upgrading to Mageia 7 my laptop frequently gets a black screen, on average about once an hour, I think. When that happens the system still seems to be up, the backlight can be (un-)dimmed, and I can get back to normal operation by putting it in suspend by keyboard, and switching it on again.
I can't find anything relevant in the logs.
HP Elitebook 820. i5-4310U, 8GiB ram.
lspcidrake -v | grep VGA
Card:Intel 810 and later: Intel Corporation|Haswell-ULT Integrated Graphics Controller [DISPLAY_VGA] (vendor:8086 device:0a16 subv:103c subd:1991) (rev: 0b)
uname -a
Linux Anthraciet.lan 5.3.13-desktop-2.mga7 #1 SMP Mon Nov 25 20:30:40 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
xfce4.