Hi Kai-heng, Here are the test results we got. Kernel 4.15.0-14-generic failed. Transmit queue timed out. The dmesg output is attached. The tg3 module crashes in a few seconds right after opening the user session (e.g. about less than 10 sec). However, kernel 4.15.0-9-generic worked like a charm. It boots and brings up tg3, the Ethernet link is working and the module seems stable. We tested it to download a few gb, an Ubuntu image, play videos for a few hours and the like. Not even a single crash was observed. The dmesg output for this working kernel is attached also, because maybe it might help you to sort out what's different from one kernel to the other. Would you like us to test another image? Or to gather more information? Regards, Paulo On Fri, Apr 13, 2018, 14:03 Paulo Guedes - IFPE - Campus Recife <