On Saturday, January 25, 2014 12:51:25 AM Vladimir 'φ-coder/phcoder' Serbinenko wrote: > 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.
You mean it won't write the cmos.default after upgrade? And why would you need to reset CMOS if trackpad is disabled? # nvramtool -a # nvramtool -w trackpad_enable=Enable -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
