System is Intel® Core™ i7-7700K CPU @ 4.20GHz × 8 with Intel® HD Graphics 630 (Kaby Lake GT2). Motherboard is ASUS PRIME B250M-A
Updated to 19.10 yesterday and the VGA display port no longer works. I was running a three monitor display setup in 19.04 utilizing the HDMI, DVI, and VGA outputs.
After upgrading to 19.10, I can no longer get to the login screen when the VGA port is connected. It will boot up, but once it gets to trying to enable the login display manager, it flashes a red screen, then goes black, then flashes, and so on. This occurs even if I disconnect all other displays and use just the VGA port.
At one point during testing, I was able to press Ctrl+Alt +F4, wasn't able to get a login prompt, but did see some messages similar to this:
I don't have the exact error unfortunately, and could not find it in the logs anywhere. This would print out every few seconds, and seemed to align with the red flashes.