12-04-2012 10:51 PM - last edited on 03-06-2024 06:39 PM by ROGBot
12-04-2012 11:27 PM
12-05-2012 12:00 AM
12-05-2012 12:15 AM
12-05-2012 01:02 AM
12-05-2012 01:52 AM
Enigma wrote:
I'm not sure what you mean when you ask if I did a UEFI install for 8. the option was never presented, I simply assumed it would do so on its' own. and I have no idea what you mean when you ask if I converted to GPT. however, during one of my previous 8 installs, I did receive a message at the partitioning menu that one of my partitions was GPT, if that's any help. I upgraded to 221 a few weeks ago, I recently noticed that the UEFI option is missing, but I clearly remember it being present in the BIOS before.
it also appears that you're wrong about the option not being available on machines that were originally preloaded with 7. what I did try to do is flash backwards from 221 to 207 (the earliest available on ASUS support site) with WinFlash, using the /nodate parameter to bypass the message about the revisions being too old. it successfully downgraded to 207 and when I rebooted I noticed that the UEFI option was present again. and then I upgraded from 207 to 210, UEFI option still present. but when upgrading from 210 to 221, it disappeared. so it appears that ASUS removed it from 221. but do I really have to run an older BIOS revision to retain UEFI?
my next idea is to downgrade to 210, making sure that the UEFI option is enabled, then install 8 and Server, and then Ubuntu, while checkin to be sure I don't get the "secure boot is disabled" message. i'm thinking that maybe UEFI wonjt disappear from the BIOS when upgrading from 210 to 221 if an OS is already present that depends on it, since that would be the equivalent of sabotage and presumably could cause all of the OSes to not boot. so i'll test that next.
12-06-2012 01:08 PM
in order to use SecureBoot, you need an OS that is installed in UEFI mode. in order for OS to be installed in UEFI mode, you need a GPT disk.
ah that.. actually i meant the new bios options, SecureBoot Control and Launch CSM, not UEFI. i am not sure if these new options are present in bios 221.
actually for us g55 owners, there is no UEFI option in the bios. it's kind of a hidden option, but it's there all the times. when the bios detects the presence of UEFI-capable devices (e.g. OS installers, disk cloning bootables), it will let us choose to use it or not.