We have a few DPX2’s. They all run Drive 188.8.131.52bL, which is the latest release to this date. They all have a strange problem: sometimes, when we reboot Tegra A (sudo reboot), it will hang/lock Tegra B. We cannot ssh into it in any way. Not via the external ip (e.g. 10.10.172.72 in one setup), nor via the internal vlan ip (10.42.0.29). I believe it sometimes also happens the other way around: rebooting Tegra B can hang Tegra A. But of the latter I’m not 100% sure, because we mostly use Tegra A.
Our systems are often remote, so turning it off/on physically is not an option.
Of course I’m interested in understanding and solving the root cause. But a workaround would also be very welcome. One workaround is to plug the host-to-host usb A to usb A cable in Tegra A usb and connect it to the USB2 debug hub. Then we can connect via minicom to the aurix shell and reset tegra B. A rather ugly approach, as it needs the USB A to A cable to be permanently connected between Tegra A and the debug hub. Also, if rebooting B hangs A, we have no solution, as we cannot go into aurix shell from B, only from A.
Some other ideas:
- is it possible to log into the aurix shell from Tegra A or B without the USB A to USB A cable?
- is there some other way to reset tegra B from tegra A? e.g. using the TACP protocol? I tried searching documentation, but I couldn’t find API documentation of libtacp.so.