I build CB from the master branch a few times a month for an ASUS KCMA- D8 motherboard. On some CB builds, CB will boot fine and consistently (press the power button, wait a little bit, SeaBIOS starts).
On other CB builds, sometimes it may boot fine (power button, wait, SeaBIOS), but other times it won't boot fine (press power button, wait a bit, nothing happens/no SeaBIOS). When it doesn't boot, I have to reset the machine a random amount of times in order to get it to finally boot (sometimes 2-3 times, but as of lately it's been up to 5+ times).
I didn't keep track of successful build dates/commits, but I believe I compiled from master earlier this month (April 2019) and had consistent booting. I'm currently using the 4.9 release tag and it boots consistently.
I looked at the merged commits from this month and didn't really see anything obvious that may be causing this. I'm unsure how to debug CB or get any kind of logs from it, and don't have any serial or USB debugging hardware.
I'd like to be able to compile from master and boot consistently, and would like to figure out what the problem is.
I have the settings I set for CB for this motherboard noted here: https://wiki.realmofespionage.xyz/devices:asus_kcma-d8#coreboot