Modem not being put into download mode with qmi-firmware-update

Paul Gildea gildeap at
Tue Apr 20 16:00:13 UTC 2021

Hi Aleksander!

Thanks for the reply. I am already using --override-download unfortunately!
But perhaps the bug is only occurring when trying to go to the same
version, I'll try to upgrade to another version and let you know.



On Tue, 20 Apr 2021 at 16:52, Aleksander Morgado <aleksander at>

> ,Hey Paul,
> > I have noticed this several times with Sierra Wireless modems, when I
> try to perform a firmware upgrade they are failing as the modem does not go
> into download mode and I get "error: unsupported download protocol". Once
> this happens I have to do a full reboot of the system to make it work again
> as the behaviour is then consistent. In dmesg I can confirm that it is
> rebooting and going straight into application mode and thus fails. Any
> ideas what is going on?
> >
> Looks like the upgrade operation is trying to write a firmware version
> + carrier that already exists:,002.026_000,GENERIC
> When this happens, the modem just reboots itself selecting the desired
> firmware that already exists, without entering the download mode.
> You can override this by using --override-download in
> qmi-firmware-update; that should make it enter the download mode even
> if the same requested firmware+carrier versions are already installed.
> --
> Aleksander
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