After fwupd upgrade with mbim-qdu method, MM sometimes generate plugin failed with the regenerated MHI driver.

ModemManager/src/mm-port-mbim.c:

static void
mbim_device_new_ready (GObject      *unused,
                       GAsyncResult *res,
                       GTask        *task)
{
    GError     *error = NULL;
    MMPortMbim *self;

    self = g_task_get_source_object (task);
    self->priv->mbim_device = mbim_device_new_finish (res, &error);
    if (!self->priv->mbim_device) {
        g_task_return_error (task, error);
        g_object_unref (task);
        return;
    }

    /* Now open the MBIM device */
    mbim_device_open_full (self->priv->mbim_device,
                           MBIM_DEVICE_OPEN_FLAGS_PROXY,
-                          30,
+                          34,
                           g_task_get_cancellable (task),
                           (GAsyncReadyCallback)mbim_device_open_ready,
                           task);
}

Steps:

mbim_device_open_full time_out=30

1. sudo systemctl stop ModemManager
2. sudo /usr/libexec/mbim-proxy --no-exit --verbose > mbim-proxy_failed_log 2>&1
3. sudo ModemManager --debug > ModemManager_failed_log 2>&1
4. sudo fwupdmgr install xxxxxx.cab

mbim_device_open_full time_out=34

1. sudo systemctl stop ModemManager
2. sudo /usr/libexec/mbim-proxy --no-exit --verbose > mbim-proxy_succeed_log 2>&1
3. sudo ModemManager --debug > ModemManager_succeed_log 2>&1
4. sudo fwupdmgr install xxxxxx.cab

mbim-proxy_failed_log

ModemManager_failed_log

mbim-proxy_succeed_log

ModemManager_succeed_log