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<font color="#000099">My goal is to update the firmware of a
broadband modem.<br>
I use <span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">qmi-firmware-update</span>
in combination with Sierra Wireless EM7455.<br>
That modem belongs to firmware series SWI9X30.<br>
<br>
I have read some of the update examples.<br>
I have made several experiments on EM7455.<br>
All of them have failed at the beginning of the update process.<br>
<br>
Now I try to try the cause.<br>
I ask you for cooperation.</font>
<div><font color="#000099"><br>
</font></div>
<font color="#000099"><strong>HARDWARE</strong><br>
<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;"># lsusb</span><br>
<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">Bus 003 Device 010: ID
413c:81b6 Dell Computer Corp.</span><br>
Note: a re-branded modem by Dell<br>
<br>
<br>
<strong>DEVICE DRIVERS</strong><br>
I didn't use drivers from Sierra Wireless.<br>
Loaded modules are listed in the attached file.<br>
Note: I didn't seen module "<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">qmi_wwan</span>" in
that list.<br>
<br>
Is the loading of driver "qmi_wwan" required?<br>
<br>
<br>
<strong>SOFTWARE ENVIRONMENT</strong><br>
<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">Distro: RHEL 7.5
x86_64 Workstation</span><br>
<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">kernel-3.10.0-862.el7.x86_64</span><br>
<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">libqmi-1.20.0-1.fc28.x86_64</span><br>
<span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">libqmi-utils-1.20.0-1.fc28.x86_64</span><br>
<br>
Note: <span style="font-family: courier
new,courier,monaco,monospace,sans-serif;">libqmi</span> is from
Fedora 28 repository.<br>
<br>
<br>
<strong>UPDATE TRIALS</strong><br>
I have tried and update operation by specifying:<br>
A) THE VID:PID OF A DEVICE<br>
B) AN EXPLICIT QMI DEVICE<br>
Results are listed in the attached file.<br>
<br>
<br>
Thanks in advance for your advice.<br>
Pavlin Georgiev</font>
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