Public bug reported:
No more /dev/ttyUSB? device for RS485 USB dongle after upgrading
lsusb -t #after upgrading
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=dwc2/1p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
|__ Port 2: Dev 3, If 0, Class=Mass Storage, Driver=uas, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 3: Dev 5, If 0, Class=Communications, Driver=, 12M
|__ Port 3: Dev 5, If 1, Class=CDC Data, Driver=, 12M
|__ Port 4: Dev 6, If 0, Class=Vendor Specific Class, Driver=, 12M
should see something like
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=ch341, 12M
ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: linux-image-5.13.0-1008-raspi 5.13.0-1008.9
ProcVersionSignature: Ubuntu 5.13.0-1008.9-raspi 5.13.14
Uname: Linux 5.13.0-1008-raspi aarch64
ApportVersion: 2.20.11-0ubuntu70
Architecture: arm64
CasperMD5CheckResult: unknown
Date: Tue Oct 19 07:13:27 2021
ImageMediaBuild: 20210421
SourcePackage: linux-raspi
UpgradeStatus: Upgraded to impish on 2021-10-19 (0 days ago)
** Affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 arm64-image impish raspi-image
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https://bugs.launchpad.net/bugs/1947723
Title:
/dev/ttyUSB? port lost on upgrading to 21.10
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