Raspberry Pi 4 loose Wifi connection when connecting external SSD

Bug #1857760 reported by Sam
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux-raspi2 (Ubuntu)
Hui Wang

Bug Description

When I connect an external SSD (Samsung 850 EVO 500 Go in a UGREEN USB 3.1 case) on my Raspberry Pi 4 (4Go) the Wifi stop working. It is easy to reproduce, either en USB3 or USB2 connectors.

The SSD is mounted, only the Wifi fails.

The problem does not occurs on a fresh Rasbian.

The problem does not occurs if I connect the SSD case on my keyboard (a R.Pi keyboard including a USB hub). Only if I connect the SSD directly on the R.Pi.

When I disconnect the SSD case, the Wifi generally gets back, but sometimes I had to set the wifi OFF then ON (through gnome gui tooling). I don't have to reboot.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-1014-raspi2 5.3.0-1014.16
ProcVersionSignature: Ubuntu 5.3.0-1014.16-raspi2 5.3.10
Uname: Linux 5.3.0-1014-raspi2 aarch64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: arm64
CurrentDesktop: ubuntu:GNOME
Date: Sat Dec 28 14:16:44 2019
SourcePackage: linux-raspi2
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
Sam (sam-onzeweb) wrote :
Revision history for this message
Hui Wang (hui.wang) wrote :

Could you provide a link to the hardware you are using? like 4go board and ugreen usb 3.1 case?

And btw if you connect a normal usb flash drive, does this issue happen?

Revision history for this message
Sam (sam-onzeweb) wrote :

The "4Go board" is the Raspberry Pi 4 Modebl B with (with 4Go RAM) : https://www.raspberrypi.org/products/raspberry-pi-4-model-b/ . Sorry if it wasn't clear enough.

The UGREEN case was bought on Amazon : https://www.amazon.fr/gp/product/B07D2BHVBD

I don't have the UGREEN packaging, but according to product number on Amazon description is should be : https://www.ugreen.com/product/type_c_to_sata_external_hard_drive_enclosure-en.html

If I plug an USB key on either USB2 or USB3 there is no problem.

Revision history for this message
Hui Wang (hui.wang) wrote :
Changed in linux-raspi2 (Ubuntu):
importance: Undecided → High
assignee: nobody → Hui Wang (hui.wang)
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