Setting resolution through config.txt is a feature of the firmware, not of any specific OS (although I think there's something weird about how NOOBS and Berrybo

Setting resolution through config.txt is a feature of the firmware, not of any specific OS (although I think there's something weird about how NOOBS and Berryboot map their /boot partitions around, or something...and that's part of why I avoid them). Anyhow, setting resolution in config.txt ought to work everywhere.