linux RM500Q 设置为usbnet,5之后，AT指令不响应也不能拨号入网，只剩下/dev/ttyUSB0

功能分类 软件基本功能
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怀疑是模组现在应该是在RNDIS mode
这个情况重新烧录应该都不行

这个模组不支持usbnet 5
可以先试下改option.c

ls /lib/bus/usb-serial/drivers/ 看看

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刚刚我的同事也找过了，修改的地方

	{ USB_DEVICE_INTERFACE_CLASS(QUECTEL_VENDOR_ID, 0x0800, 0xff), /* BG95 */
	  .driver_info = RSVD(4) | ZLP },

同时注释掉

#if 0   //Added by Quectel
	if (serial->dev->descriptor.idVendor == cpu_to_le16(0x2C7C)) { 
 		//some interfaces can be used as USB Network device (ecm, rndis, mbim) 
 		if (serial->interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 
 			return -ENODEV; 
 		} 
 		//interface 4 can be used as USB Network device (qmi) 
 		else if (serial->interface->cur_altsetting->desc.bInterfaceNumber >= 4) { 
 			return -ENODEV; 
 		} 
 	} 
#endif