Hi, I observed strange behaviour on our custom carrier board and colibri imx7.
On our system, if one brings down the interface with ifconfig eth0 down, the system freezes after about 5 seconds with some boards: E.g. I don’t see it with colibri imx7d number 03115176 but with number 03139590.
There are some cases where this behaviour can’t be seen:
- If one is fast enough with putting ifconfig eth0 up, everything is fine
- Unfortunately I could not reproduce the behaviour on the colibri eval board (with a colibri which causes problems on our carrier board), it seems that there is a hardware issue on our side
- I do not observe this behavour if lcdif is “okay” in the devicetree
My workaround for now is to enable lcdif in the devicetree even if we do not use any display and comment out the pins in pincontrols for lcdif (as we use some of them as flextimer or gpio)
Do you have any idea what could cause this strange behaviour on our carrier board? E.g. is there any difference on the colibris which I mentioned, which could give us a hint?