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After installing Fedora I cant open BIOS/EFI Setup

asked 2012-09-28 06:07:01 -0500

LeoSci gravatar image


I've Installed Fedora 17 on my Fujitsu AH532 Notebook. However, when I press F2 (Setup) or F12 (Bootmenu) on Boot there is no reaction and Fedora is just booting. Also removing the Harddisk has no success - I've get a blackscreen. So I think Fedora has manipulated my EFI Firmware.

Hope you understand my problem.


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answered 2012-10-04 14:43:54 -0500

pjones gravatar image

updated 2012-10-04 15:46:45 -0500

You may have "Windows 8 Fast Boot" turned on in the firmware. Unfortunately what this means is that the firmware isn't going to load your keyboard controller's drivers during the early boot process. So turning that off can help this situation - but only if you can get into the firmware to begin with.

You can also change what boot options are available (and in what order) using efibootmgr from a shell once Linux is running, but it's not for the faint of heart.

One other method of entering the firmware may be supported. Check if /sys/firmware/OsIndicationsSupported-8be4df61-93ca-11d2-aa0d-00e098032b8c/data exists. If it does, run "md5sum data" on it:

[root@localhost OsIndicationsSupported-8be4df61-93ca-11d2-aa0d-00e098032b8c]# md5sum data 33cdeccccebe80329f1fdbee7f5874cb data

If it matches that number, then there's a mechanism called "EFI_OS_INDICATIONS_BOOT_TO_FW_UI" that's supported. This allows you to tell it to boot to the firmware UI on the next boot. Unfortunately there's not a great way to tell it to do that in F17 (a better interface for this method is planned.) So here's the not-so-great way. Download the file at . As root, do: "cat enter-uefi-fw > /sys/firmware/efi/vars/new_var". This creates a firmware variable under the UEFI Global Variable namespace named "OsIndications", which has a flag set to inform the firmware that a service boot is desired.

When you reboot, it should boot into the firmware config interface.

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@pjones It's a pitty that this "As root, do: "cat enter-uefi-fw > /sys/firmware/efi/vars/new_var". " doesn't work on Ubuntu kernel 3.13 and 3.17:

Pro Backup gravatar imagePro Backup ( 2014-10-03 16:42:58 -0500 )edit

answered 2012-10-06 03:29:24 -0500

Hello LeoSci, I've got the same laptop and the same problem. Hor did you make the CMOS Reset? Tell me please, and you will be my hero!!! :-D

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answered 2012-10-01 01:56:23 -0500

LeoSci gravatar image

Ok, it was hard but I've made a CMOS Reset to get the default boot order. Then I've installed Windows7 and flashed my bios.


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Asked: 2012-09-28 06:07:01 -0500

Seen: 3,347 times

Last updated: Oct 06 '12