I updated the BIOS on a Gigabyte GA- MA790X (AMD socket) motherboard and my USB keyboard will no longer trigger BIOS access.
The system still boots correctly and the machine is very stable with no other issues. But it sucks having to keep a PS2 keyboard around in order to access the BIOS.
This doesn't make much sense to me, since the previous old BIOS accepted input from the same keyboard. Any ideas appreciated!
What problem were you having to warrant a bios update?
Check Device Manager and see if you are having problems with USB 2.0 or 3.0 drivers.
I have never used a Gigabyte motherboard so I know little about the settings.
I suggest that your motherboard setting is where the problem is. (Bios)
Grab your motherboard manual and go through the settings.
Some one that uses Gigabyte motherboards would be more helpful.
Sorry about that. I will see if I can find someone. I went back to the ranch and requested help.
Hang in there.
I have been through the BIOS. The typical reference is to "enable USB legacy devices" or something like that (which is set to enable). That's why it seems so odd. Mobo's have been recognizing USB at POST now for a looong time.
Stupid question but have you tried switching off the legacy USB BIOS support and seeing if that makes a difference, I doubt it but ...
I have a GA-Z77-HD3 motherboard with an Intel CPU & according to my mobo manual Port 60/64 Emulation needs to Enabled for full legacy support for USB keyboards/mice in MS-DOS mode. The default setting is Disabled.
Try changing this & see if that helps.
Legacy USB Support also needs to be Enabled for USB keyboard/mice used in MS-DOS mode. The default setting is Enabled.
One other thought. I'm running in IDE mode and I thought under the old BIOS I was running in AHCI mode.
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