Hello, all. Due to my failue to foresee this problem if one upgrades X60 coreboot, you need to manually reset CMOS config or your trackpad may not work as option "trackpad_enable" will get a garbage value. While I admit my part of fault, I feel like we should have a way to update options safely. I see following possibilities: 1) Hide ourselves and tell that on upgrade you always have to clear CMOS. I don't think it's really an option as users will continue just running flashrom and in case of external flashing, CMOS reset may require full power removal with cell battery sometimes in difficult to access places inside laptop. 2) Have some version field to check and if it mismatches reset CMOS to default. To avoid having to maintain version manually I propose to checksum option table and write 16-bit result to CMOS. 16-bit should give enough confidence without excessively using CMOS. I've made a prototype at http://review.coreboot.org/#/c/4790/4 . If we can agree that it's a right approach, I'll make this prototype into complete patch (mostly missing is laborous adding of version field) 2a) instead of having separate field we could make XOR layout checksum into CMOS checksum. This would save 2 bytes but will break any existing users if they check checksum.