Mac mini M1 ethernet doesn't work after waking from sleep

Forget sleep and just do "Lock Screen". The Mini draws so little power

that sleep is not necessary.

I have the same issue. Also tried many of the tips on older Mac OS versions that didn't work either. In the end a static IP did the job. Seems the DHCP startup after sleeping doesn't work properly.

I have this issue constantly with a mac mini m1 plugged into a gb switch. Regardless of cable or port, the mac mini will simply not work with the nic if this state triggers. Specifying a manual IP doesn't matter. The OS seems to have a bug relating to self-assigned IPs and switching the config of the nic.

I always end up enabling wifi to get around the internal network stack bug. It's been repeating constantly since I bought this mac mini last month.

Sleep saves nuthin’ , newer Macs have no moving parts except for the fan which doesn’t consume much unless the computer is busy. So, disable sleep and don’t lose more sleep over it.

Disable sleep, it’s a non-feature for later Macs.😜

On a side note that may be related. I was having issues with intermittent Wi-Fi and Bluetooth. The signal meter always showed at least 2 of 3 bars and sometimes would stop working when 3 bars were showing.

I found the issue was the USB3 7-port HUB I added was acting like an antenna and interfering with the Wi-Fi and BT. Maybe USB devices RF noise effect the wired Ethernet as well?

I fixed the issue by adding RF shielding to my HUB's cable and case with copper tape and ferrite beads. Since the ferrite bead kit came with several of many sizes I also added them to all my USB cables that didn't already have them. Knock on wood... So far the issue hasn't returned after several days.

I also disabled sleep since restart of network from sleep is broken on the M1 mac.

This might be a long shot but I also noticed when using dropbox, it took up almost all of my file descriptors and suspect that shut the ethernet port down (I saw this fd issue in my console.log but I do not have those logs anymore), on my 8gig I saw this having an effect on my ethernet connectivity- try turning it off if you use it and re-measure uptime again perhaps. Trying to think outside the box.. what if this is not just an ethernet issue

Disable sleep, non-feature.

Sorry for the Johnny Come Lately post. I am having similar issues but not after sleep.... at least not yet. However I do lose DHCP and even though I have the WiFi enabled and on it will not switch to the WiFi as my MBP that I had in its place would do. The NIC still thinks it has a valid route via the Interface that is APIPA addressed. What worked for me as a band-aid is to turn off the interface and turn it back on.

I opened a case with Support but as usual, they do not have a fix. Its always a "re-install" blah blah. I wanted to increase the verbosity of the logging to see if I or "support" could identify a root cause before I experience the issue. They are not aware and say that they need to send it to "engineering", which is a blackhole of regret with them.

I may attach a USBC Ethernet dongle to see if the same thing happens. It is not my switch since I had my MBP plugged in for 1.5 years without any issues, it is not my "router" (as support loves to say) I work for the mfg of the firewall (router) and can guarantee that is not the issue. Not the cable either because of the aforementioned.

Let us know here if you come up with something. I will do the same. I created another post because I had not see yours. Will, update both.

@Sean Aaron Ethernet hardware definitely seems flaky. I had disabled the screen saver and the sleep settings before I experienced the same reboot -> crash -> reboot loop as you. Luckily for me the system eventually righted itself. I don't know what I did that made any difference. The ethernet interface still drops at random times, requiring a ifconfig down then up to bring it back but so far it always comes back. My 10 year old Mac mini is more reliable than my new M1 mini. :-(

Has anyone tried putting their M1 Mac mini into Safe Mode to see if the problem goes away? That's as far as I've made it with Apple Support (had to get an external display). Been about 12 hours and haven't needed to down/up the ethernet connection, but I'm also not able to put it through its normal paces in Safe Mode. Appreciate an update if anyone else is able to test!

Problems with 3rd party firewall/virus scanner are orthogonal. This particular problem with intermittent Ethernet-connection has been confirmed to exist on machines with no such additional software.