Bug? ",dr_mode=peripheral" missing?

[agilebotanist]

I checked the tutorial, and the USB OTG is working now. Thanks a million.

I noticed this "bug" in the instructions: ",dr_mode=peripheral" missing in config.txt.

This blocked everything.

The correct code is below

[all]
dtoverlay=dwc2,dr_mode=peripheral

Hope it heps.

[verxion]

If I may ask, are you using a pi5 or pi4? When you say it blocked everything,what were your symptoms? I'd also like to confirm for example if you were using an M4 iPad Pro or other device to power your Pi.

For my own part, I do not need "dr_mode=peripheral" on my pi5, only on my pi4 (where I have it in the instructions).

Thanks for reporting this!

[agilebotanist]

I have PI5 16Gb from Jan 2025

Behaviour without peripheral:

• ipad (M1 Pro) do not see the external ethernet interface.
• when trying nmcli up usb0, PI5 replaces wired eth0 interface by usb0, but it looked totally wrong since the MAC of the interface remains (do not recall more details).

Adding "peripheral" fixed both behaviours.

PS. Hmm, I have doubts there was something like "dr_mode=host" in default config.txt

[verxion]

Ok, I don't have an M1 iPad Pro to test with anymore, but I -do- have both an 8gb and 16gb Pi 5 I can test with. My Pi 5, as I recall, did NOT need this to work on my M4 iPad Pro (will confirm after my workday is done). I wonder if somehow this is different on M1/M4 iPad Pros. :(

[verxion]

@agilebotanist I apologize for the delay in getting back to you (been busy!), but I can in fact confirm that both my 8gb and my 16gb pi5 are WITHOUT the "dr_mode=peripheral" in config.txt, yet they both work perfectly.

Bear in mind, I don't have an M1 iPad Pro to test with as I gave it to my daughter. I'll see if I can arrange a time to test this on her M1 iPad Pro, but that will likely be a few weeks as she is quite busy with college.

[verxion]

I have PI5 16Gb from Jan 2025

Behaviour without peripheral:

• ipad (M1 Pro) do not see the external ethernet interface.
• when trying nmcli up usb0, PI5 replaces wired eth0 interface by usb0, but it looked totally wrong since the MAC of the interface remains (do not recall more details).

Adding "peripheral" fixed both behaviours.

PS. Hmm, I have doubts there was something like "dr_mode=host" in default config.txt

In my 16gb Pi5, which is a more recent build, it has a "[cm5]" section that is commented out (I think by me), which does indeed have dr_mode=host, but obviously, being commented out AND being cm5, it isn't being used.

[verxion]

My wife actually has my now ancient 3rd gen iPad Pro and THAT one also connects just fine without any "dr_mode" entry (on both 8gb and 16gb Raspberry Pi).

So either there truly is something unique about the M1 iPad Pro versus BOTH the M4 iPad Pro and 3rd gen iPad Pro or... there is something unique to your configuration that is causing the need for this.

I'd suggest (if you are willing) that you try an absolutely fresh install on a different micro SD card following my explicit steps and then see if you still have the issue. If you do, then I'll try to borrow my daughter's M1 iPad Pro when I can, but like I said, that is likely to be a couple weeks from now before I could test.

[verxion]

It took until TODAY for me to be able to test on my daughter's M1 iPad Pro. My same 16gb Pi5 with unchanged configuration works perfectly and gets IP address just fine...

Not sure what you are doing different, but it works here.

Just in case it matters, I checked and her iPadOS version is 18.0.1, model MHNW3LL/A (5th gen)