Re: Killing bluetooth dead
On Mon 05 Dec 2022 at 11:57:19 (-0500), Jeffrey Walton wrote:
> On Mon, Dec 5, 2022 at 10:19 AM <dave@sherohman.org> wrote:
> >
> > I've got a headless server which is endlessly spamming its logs multiple
> > times per second with:
> >
> > ---
> > Dec 5 15:22:33 fubar systemd[2097]: Reached target Bluetooth.
> > Dec 5 15:22:33 fubar systemd[2093386]: Reached target Bluetooth.
> > Dec 5 15:22:33 fubar systemd[2093386]: Stopped target Bluetooth.
> > Dec 5 15:22:33 fubar systemd[2097]: Stopped target Bluetooth.
> > Dec 5 15:22:33 fubar kernel: [2937739.971268] usb 1-14: new full-speed USB device number 119 using xhci_hcd
> > Dec 5 15:22:33 fubar kernel: [2937740.121486] usb 1-14: New USB device found, idVendor=8087, idProduct=0032, bcdDevice= 0.00
> > Dec 5 15:22:33 fubar kernel: [2937740.121493] usb 1-14: New USB device strings: Mfr=0, Product=0, SerialNumber=0
> > Dec 5 15:22:33 fubar kernel: [2937740.124798] Bluetooth: hci0: Reading Intel version information failed (-22)
> > Dec 5 15:22:33 fubar kernel: [2937740.124813] Bluetooth: hci0: Intel Read version failed (-22)
> > Dec 5 15:22:33 fubar kernel: [2937740.124972] Bluetooth: hci0: Intel reset sent to retry FW download
> > Dec 5 15:22:33 fubar kernel: [2937740.125348] usb 1-14: USB disconnect, device number 119
> > Dec 5 15:22:33 fubar systemd[2046734]: Reached target Bluetooth.
> > Dec 5 15:22:33 fubar systemd[2046734]: Stopped target Bluetooth.
> > ---
> >
> > How do I kill bluetooth dead and make this stop?
>
> It may be easier to look in the BIOS/UEFI and see if there's a way to
> disable Bluetooth and Wifi. Then you don't have to worry about drivers
> loading for chips that are no longer powered on.
Would that not require adding a head to the headless server?
> I often disable Bluetooth and Wifi for machines in my house that have
> a full time wired connection. There's no need to turn on all the
> radios when they are not used.
Does the wireless operate without a module to drive it? What does it
spend its time doing, ie what would it transmit, or be listening for?
I was under the impression that just soft-blocking was enough to stop
radios from operating, hence airplane mode (though it is a mystery to
me why even the FM radio in my mobile phone won't operate in airplane
mode).
Lurching OT: anyone here use nextradio on their mobile phone?
Cheers,
David.
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