Basically, since I upgraded to 20.04 from 19.10, my screen sometimes blinks to black for about a second then back to normal for a bit, and blinks again and then works as expected. The issue happens on the login screen, right after login and when running a .exe through Wine. It might also happen in other scenarios but I haven't encountered it elsewhere as of yet.
I've tried running on both Xorg and Wayland (I typically use X though), on both the Ubuntu session and the "stock" Gnome session, same result everywhere.
I'm running on a Dell XPS 13 2 in 1 7390, which has an Icelake Intel processor (1065G7). I could deal with the issue if it only happened at login (it doesn't happen when waking up from sleep on the lockscreen, and I don't reboot that often), but I run quite a lot of .exe games and while the issue fades right after the game is started up it is still quite annoying.
I'd appreciate it a lot if someone could point me to the right log files to help me diagnose what's happening, if someone has an idea of how to fix it that'd be even better obviously.
Edit: Output of
lspci -k | grep -EA3 'VGA|3D|Display' as requested:
00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics G7 (rev 07) DeviceName: To Be Filled by O.E.M. Subsystem: Dell Iris Plus Graphics G7 Kernel driver in use: i915