Grub executes in boot before peripherals

E

Egbert

Running FreeBSD 14.3-RELEASE releng/14.3-n271432-8c9ce219fef7 GENERIC amd64 on AMD FX-6100 with 8GB RAM.

When the computer boots I would like to halt Grub to add a one-off parameter to the loader.
The USB keyboard is not active and grub times-out (currently 10 seconds) so I cannot edit Grub.

Is it possible to tell the boot loader to run later so all the peripherals are ready first? At present my workaround is to use a legacy PS/2 keyboard but it's not really convenient.
 
You could try the option in the BIOS that presents a USB keyboard as a PS/2 keyboard, often indicated as "USB legacy" or something to that extend. This is typically an option for legacy operating systems that have no USB support.
 
It's an old motherboard, M5A78L-M LX, but changing 'Legacy USB Support' from AUTO to ENABLED seems to have done the trick and also shows that the keyboard plugged directly into the motherboard USB ports is fine but not if I use my powered KVM. However the KVM is a separate issue :)

The suggestion made by SirDice has solved my query.
 
I've been having issues with this too. I didn't realize that is what has been happening. The keyboard and mouse sometimes dont register, or the screen sometimes and the wifi is not working properly, wifi on usb. Also having odd issues with GPU. So, I possibly should look into legacy for USB or moving from UEFI.
 
I have still to work out why my KVM is causing problems with video and keyboard, but I don't want to pollute this thread with it or the Nvidia driver. As for UEFI my BIOS is so old that is not a choice on this computer.
 
I think I just need to pull the motherboard out of the system I am having issues with and throw it in the trash. It's infuriating. BIOS update is a good idea. I think I'll try that.
 
RE - KVMs have always been problematic because they often do not properly continue/emulate/implement the IO protocols on the "off" channels, so the host machines then thinks there has been a dissconnect of the mouse/kb or video. Good KVMs have always been very pricey, at least when I worked with them.
 
Not promising to workaround, but in some cases, configuring BIOS/UEFI firmware to do extended tests (or extended memory tests alone) allow slow-to-start peripherals to up and running after powerint on.

And some admins keeps PS/2 keyboards / mice for some motherboards which USB keyboard/mice does NOT work properly and having PS/2 ports on BIOS configs. I myself have same experiences, too, at $work and the very admin kindly lent me his spare PS/2 keyboard and mouse at the time.

A bit off-topic here, but as far as I know, Bluetooth keyboards and mice usually DON'T work until any OS supporting BT and properly paired is up and running, thus, cannot enter into firmware configuration menu with them.
It is toooooooooo annoying and why I hate BT keyboards and mice.
I prefer non-BT wireless keyboards/mice using specific dongle when I need wireless ones with some reason, whenever possible.

It SHALL be paired on initial motherboard startups by UEFI firmwares themselves, if any other keyboards and/or mice are attached via PS/2 or USB when it is powered on at the first time after shipment (and factory reset is done), and there are any BT keyboard is in pairing mode. Maybe typing random PIN shown on screen would be wanted to finish pairing for safety, though.
 
That's why I still keep old Fujitsu/Siemens PS/2 keyboard in one of the drawers, and have USB-PS/2 adapter for the mouse somewhere around (probably in the box with tools).
 
One very odd thing, the KVM has blue USB 3.0 connections which I connected to the blue USB 3.0 ports of the motherboard. While trying all sorts of things without success in desperation I plugged the KVM into the motherboard USB 2.0 connections and the [expletive] thing worked for switching over the keyboard and wireless mouse (dongle plugged into KVM). Doesn't directly solve BIOS, UEFI, etc things, but I thought it was worth sharing.
 
Egbert said:
One very odd thing, the KVM has blue USB 3.0 connections which I connected to the blue USB 3.0 ports of the motherboard. While trying all sorts of things without success in desperation I plugged the KVM into the motherboard USB 2.0 connections and the [expletive] thing worked for switching over the keyboard and wireless mouse (dongle plugged into KVM). Doesn't directly solve BIOS, UEFI, etc things, but I thought it was worth sharing.
Click to expand...
If the KVM is a "cheap" consumer grade, non-branded one, possibly.

Just purchased the cheapest type-A connector in the market for USB2.x interface when manufacturing the lot (including yours).
 
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