Mention in the wiki to reset CMOS after a flash

[underdogest]

Is your feature request related to a problem? Please describe. Spent 2 hours pinpointing the problem when I just had to reset the CMOS via removing the battery.

Describe the solution you'd like Just put it in the wiki.

Additional context

1. Flashed a x230 from legacy to maximized internaly: black screen on startup
2. Flashed the same rom externaly: black screen on startup
3. Flashed multiple tags externaly and finaly reset CMOS: normal startup

[tlaurion]

@underdogest Sorry you had this issue. Do you change CMOS settings? Should they be hardcoded firmware to make sure such settings are not causing a brick?

Questioning in a desire to unify things here. Users of t430 and other boards with gpu are told pr board configuration notes to apply some tweaks on the rom itself to change cmos settings. Maybe this should be unified?

[underdogest]

I did not change any CMOS defaults when building and afaik heads doesnt even use anything there apart from the RTC. Maybe the GPU read something from there?

Anyway, I think it would be best if heads mentioned clearing CMOS via battery removal after internal flashing and in the wiki, so users who experience an apparent brick try this first.

[tlaurion]

@underdogest my point is the opposite. CMOS settings could be read from cbfs on boot and measured by TPM.

I welcome those requests and wiki changes under heads-wiki, but the way you present it, it should be most probably changed in the coreboot config to prevent such bug, which would then need no documentation and disassembly (CMOS battery not necessarily easily accessible on all boards).

Are you under slack/matrix? Please poke me there I would love to hear and discuss this to come to an agreement with the community. Notes under research.net, search for slack/matrix/community