I have a Tri-Sync Nanao MS2931, after running the system update i now no longer get AttractMode in 31khz
On boot the Bios text displays in 31k, if i drop out into the terminal it is in 15k and if i load groovymame it loads in 31k
Games have no issues autoswitching.. Have looked through all the config files but can't see anything that would effect it. Can confirm monitor is set correctly in the config file