UEFI Big Drive question

[Chris Murphy]

On May 18, 2014, at 3:50 PM, Stephen Morris <samorris at netspace.net.au> wrote:
>> 
> Hi Chris,
>    I read an article in a computer magazine that actually said that Fedora was buying a certificate from Microsoft but Canonical were going down the path is self signing rather than purchase the certificate from Microsoft. The same article also said that under UEFI all drivers would have the be signed in order for devices to be used, and quoted the most critical device impacted by this requirement as the graphics card. The article also said that in order to implement the verification UEFI used a database of signatures that were embedded into the firmware. Given your information it appears as though the writer of the article potentially had no idea what they were talking about.

Unsurprising.

>    The issue I had with my graphics card was, having installed windows, Fedora and Ubuntu from legacy mode in the firmware, I turned UEFI on to test functionality and had booting fail before even getting to the Fedora grub2 boot menu with a message that my graphics card was not supported, so I had to switch back to legacy mode to be able to use my pc.

OS installs are either UEFI or BIOS based. They aren't interchangeable, so they break if you change the firmware mode setting after installation. But, there are some UEFI implementation where the boot mode is store in NVRAM along with the boot entry. So, we're really deep in the weeds where everyone's going to have different experiences because of highly variable firmware behavior, and even UI.


Windows