On 12/16/2021 3:11 AM, Mountain Magpies wrote:
Old box which I converted to Linux (Ubuntu) - dumped Windoze -never had
a Bluetooth card inside, so I purchased a Linux compatible Bluetooth
dongle, which works fine, but doesn't come alive until the OS is fully booted.
Any work around for this?
Maybe something which I can run once from the terminal?
Need it for a Bluetooth keyboard to operate.
Thanks in advance, as usual.
The BIOS has drivers.
The motherboard maker, if they put a "foreign" chip, one which
is not covered by the "bring-up code" for the chipset, it's possible
to add a code module. This allows a certain level of functionality
at BIOS level. In the past, there were limitations on what functions
were included. The functionality has to fit into the barren framework
of a BIOS.
OK, so a person like yourself adds "Pure Bluetooth" to the machine,
which is Bluetooth (sorta Wifi) over USB. The BIOS would need a Bluetooth module, plus it would need a meaningful "profile" to run on top of it.
Since the BIOS likes "HDD emulation code, read interface" as INT 0x13,
that would be a natural kind of profile to aim for.
If your machine was a laptop, some sort of code module might be there,
like maybe even something to netboot over BT. But considering what
a rats nest BT is, and the odds of anything working, I could understand
if the code did nothing more than make a couple ACPI entries (PNP entries). Leaving the function of the thing, to only occur at OS level.
*******
What does work ?
A dongle that emulates a HID (keyboard/mouse) device and "hides" the
fact BT is involved. Such a device would be similar to the Logitech Unifying Receiver.
It appears as a HID over USB and BT is never mentioned. The machine
doesn't even know the dongle is a radio or could use an Airport Mode.
There are slight variations in the protocol at 2.4GHz, so some things
are true Bluetooth, and some are very close to Bluetooth. But by hiding
the RF end and the little processor inside running it, the machine need
never know.
The machine does have HID drivers. It's designed to support PS/2 HID
and USB HID. The Unifying Receiver would work with the BIOS USB HID
support. And generally on the chipset ports. If you see USB2 and
USB3 ports, the USB2 are more likely to be properly integrated.
*******
You can buy a Logitech keyboard for example, one that comes with a
Unifying Receiver, plug it in, and it works at BIOS level and it
works at OS level (any OS).
If you buy the so-called "portable" keyboards, those nice little
gadgets that fold up and go into a pocket, those are intended
for smartphones and tablets. And the BT integration there might
be a bit better. As soon as you whip out the BT keyboard with
a tablet, it's anxious to pair and get the show on the road. If
the tablet boots, it will have options for onscreen keyboard
and touch, to take the place of the keyboard during any time
the machine is not ready for the protocol.
But if you take one of those nice fold-up keyboards and
bring it near a desktop, there will be periods of unhappiness,
such as not being able to interact with a UEFI BIOS perhaps.
That means there is a delineation:
1) Devices similar to the Logitech, where the plugin nanoreceiver
declares itself as HID and not BT.
2) Devices like the nice foldup BT keyboards which are plain BT,
where the smartphone or tablet "picks up the slack" via an
onscreen keyboard. Most people who pack those, expect the
foldup keyboard to only be fully functional after the machine
is booted. They are a boon, in place of poking a portable
device with a stylus for input.
Paul
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