how to downgrade to older BIOS

[Michael E Brown]

On Tue, Oct 30, 2007 at 11:13:26AM +0100, davide rossetti wrote:
> dear all,
> as suggested in https://bugzilla.redhat.com/show_bug.cgi?id=339591
> I wish I could step back and downgrade my GX620 from BIOS A11 to A10
> or A09.... how am I meant to do it ?
> 
> I tried installing system_bios_OptiPlex_GX620_0x0126.noarch via yum:
> 
> $ yum list 'system_bios*OptiPlex*GX620*'
> ....
> Installed Packages
> system_bios_OptiPlex_GX620_0x0126.noarch a09-18.1               installed
> system_bios_OptiPlex_GX620_0x01AD.noarch a11-18.1               installed
> 
> is it correct? why does not BIOS A10  show up in the list ?
> 
> then, how do I force update_firmware to install whatever BIOS I choose ?

Couple of points for general consumption:

1) the repository normally carries only the latest version of each RPM.
This is because there isnt a really good way for me to manage older
versions in an automated way.

2) the command-line 'update_firmware' command doesnt support downgrades.

3) You can use the 'inventory_firmware_gui' program to do downgrades,
though. (You have to get the actual downgraded bios manually, though.)

4) you can manually apply bios downgrades by using the method suggested
by Harold. (thx Harold).

--
Michael