Stefan Reinauer <[EMAIL PROTECTED]> writes: > Hi, > > I'm seeing a weird problem while switching back and forth between > a legacy bios and LinuxBIOS. > > I have a 256 byte cmos image created with cmos_util and a 512k bios > image for each firmware flavour. > > Switching from legacy bios to LinuxBIOS works fine using flashrom and > cmos_util. > > Switching the other way round always leaves legacy bios with a wrong > checksum on the first boot. > > writing the cmos from the file afterwards and rebooting is fine, so it's > not the cmos image that is wrong. > > Could LinuxBIOS change the CMOS when doing a reboot?
Possibly. The only safe way after a bios flash is to toggle the power. > Or is legacy bios doing some very weird things like safing additional > data in mystic places? There are a couple of possibilities. - cmos_util needs to be explicitly told not to do the linuxbios checksum calculation. - cmos_util has had problems when asked to flash all of the cmos options. (Sigsegv ...) - The high 128 bytes are only moderately standard so it may be you have a board that stores them differently. We should be ok for intel and amd chipsets. And of course other mystic locations but I would exhaust the other possibilities first. Eric -- LinuxBIOS mailing list LinuxBIOS@openbios.org http://www.openbios.org/mailman/listinfo/linuxbios
