Bug 1121361 - no way to force BIOS boot instead of EFI
Summary: no way to force BIOS boot instead of EFI
Alias: None
Product: Fedora
Classification: Fedora
Component: anaconda
Version: 20
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Anaconda Maintenance Team
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2014-07-19 20:06 UTC by Need Real Name
Modified: 2014-07-21 21:25 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-07-21 21:25:44 UTC
Type: Bug

Attachments (Terms of Use)

Description Need Real Name 2014-07-19 20:06:55 UTC
Fedora 20/21 installation image automatically boot in EFI mode when EFI is supported by the computer.
Most computers now support both EFI/BIOS boot, but some do have broken EFI,
e.g. older MACs.
The problem: installation starts in EFI mode, finish OK, but result in non-working system.

The problem: there is no way to force Fedora image to force boot in BIOS mode.
So I have to take the disk out, install Fedora (from the same installation image) on a computer non-supporting EFI, then put the disk back, and everything works fine.

It would be extremely convenient to have an option to select boot method: EFI or BIOS during boot from image, when EFI is supported. Automatic priority to EFI if EFI is supported is not good because EFI is often broken.

Comment 1 Brian Lane 2014-07-21 21:25:44 UTC
You need to force your firmware to boot in CSM mode if that's what you want. Forcing a BIOS install on a UEFI system (or some half-baked broken system) is just bound to end up in misery and more bugs.

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