I've been unable to replicate this so far; tried with four different
USB-SATA cables attaching boot storage to USB3 on a Pi 4B and a Pi 400;
wifi worked happily in each case. Given this was expired for Eoan (a
couple of years ago) I'll close this as invalid for now; please re-open
if this is still an issue.
** Changed in: linux-raspi2 (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1861338
Title:
RPI4 wifi unreliable when usb3 storage is attached
Status in linux-raspi2 package in Ubuntu:
Invalid
Status in linux-raspi2 source package in Eoan:
Expired
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
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