I don't have another usb3 one at the moment, I'll see what I can find. However, I'm also starting to think it may be RF interference from the usb3 port and or stick. If I grab the rpi4 near the usb/ethernet block in the right place, the problem seems to go away a bit. possibly something similar to the known issues with hdmi at certain resolutions jamming wifi?
I've tried with two different access points, both in the same room so I'm plenty close to have a strong signal, and I see this happen on 3 different rpi4 devices (1,2,4GB). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi2 in Ubuntu. https://bugs.launchpad.net/bugs/1861338 Title: RPI4 wifi unreliable when usb3 storage is attached Status in linux-raspi2 package in Ubuntu: Triaged Bug description: On RPI4, if you set up netplan to use wifi, and plug in a usb3 storage device to one of the 2x usb3 ports (the ones closest to the ethernet port), wifi will sudden stop working. If you unplug the usb stick while running a ping, it will usually start working again almost instantaneously. Kernel version I have is: 5.3.0-1017-raspi2 and I've confirmed this happens on both armhf and arm64 The only thing I found in journalctl that looks suspicious is this, but it seems to have happened before plugging in the usb stick: Jan 29 20:54:59 ubuntu wpa_supplicant[1129]: random: Cannot read from /dev/random: Resource temporarily unavailable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1861338/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
