ACK: [SRU][I/raspi][PATCH 0/1] /dev/ttyUSB? port lost on upgrading to 21.10 (LP: #1947723)

[Tim Gardner]

Acked-by: Tim Gardner <tim.gardner at canonical.com>

On 11/5/21 7:24 AM, Juerg Haefliger wrote:
> [Impact]
> 
> 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)
> 
> [Test Case]
> 
> Use a Serial-to-USB dongle. It won't be recognized because drivers are missing from linux-modules.
> 
> [Fix]
> 
> Add drivers/usb/serial/* to linux-modules.
> 
> [Where Problems Could Occur]
> 
> New modules might get loaded which could trigger kernel crashes.
> 
> Juerg Haefliger (1):
>    UBUNTU: [Packaging] raspi: Add USB serial modules to linux-modules
>      package
> 
>   debian.raspi/control.d/raspi.inclusion-list | 1 +
>   1 file changed, 1 insertion(+)
> 

-- 
-----------
Tim Gardner
Canonical, Inc