On 2023-02-01 06:42, Torben G. wrote:
I can reliably bring OpenBSD 7.2 to a crawl (and eventually reboot) when plugging a USB3 device into my Raspberry Pi 4B's second USB3 port.
I can confirm this happens on my rpi 4B 8gb rev1.5. Tested both with the standard image firmware and pftf/rpi4 v1.34.
Here's what I've tested so far: ... - Tested RPi's second USB3 port with Raspbian, works flawlessly.
Was that with the exact same hardware combination ? Did you try booting with those two usb3 devices already plugged in ? Here it seems only hot plugging triggers that issue and i can have both my SSD and a keyboard plugged in the two usb3 ports as long as they're both already plugged in when power is applied. Suggesting that it may be more of a power issue in my specific case.
Unfortunately I don't have a second RPi to verify whether my board is damaged, but things working fine on Raspbian seems to indicate that the hardware itself is alright.
I don't think that's the issue. You can find several mentions of the same problem on the raspberry pi forums or on the raspberrypi/linux github issues. Some suggest it's due to power issues, some say it depends on the specific hardware. There does not seem to be a consensus. https://forums.raspberrypi.com/viewtopic.php?t=275492 https://forums.raspberrypi.com/viewtopic.php?t=338883 https://github.com/raspberrypi/linux/issues/3485
My question at this point is: how do I proceed from here? How can I further isolate the issue?
Not too sure. I believe that it's very much possible that some combination of specific hub/usb to XXX/disk/power supply/rpi internal circuits or revision triggers some interference somewhere. Side note, on my setup the specific usb3 cable i use and it's position impacts greatly the 2.4Ghz wifi performance, also a known rpi4 issue.
