On Wed, Feb 09, 2022 at 12:13:28PM +0200, Eduard-Bogdan Budai wrote:
> The newest kernel that is in the standard Ubuntu 20.04 repositories is
> today Linux 5.13.0-28-generic #31~20.04.1-Ubuntu SMP Wed Jan 19 14:08:10
> UTC 2022 x86_64). After moving from 5.13.0-27-generic #29~20.04.1-Ubuntu
> to the newest 5.13.0-28-generic #31~20.04.1-Ubuntu, the dmesg showed:
>
> [Wed Feb 9 11:38:51 2022] usb 3-2: new full-speed USB device number 4
> using xhci_hcd
> [Wed Feb 9 11:38:51 2022] usb 3-2: New USB device found, idVendor=067b,
> idProduct=23a3, bcdDevice= 1.05
> [Wed Feb 9 11:38:51 2022] usb 3-2: New USB device strings: Mfr=1,
> Product=2, SerialNumber=0
> [Wed Feb 9 11:38:51 2022] usb 3-2: Product: ATEN USB to Serial Bridge
> [Wed Feb 9 11:38:51 2022] usb 3-2: Manufacturer: Prolific Technology
> Inc.
> [Wed Feb 9 11:38:51 2022] usbcore: registered new interface driver
> usbserial_generic
> [Wed Feb 9 11:38:51 2022] usbserial: USB Serial support registered for
> generic
> [Wed Feb 9 11:38:51 2022] usbcore: registered new interface driver
> pl2303
> [Wed Feb 9 11:38:51 2022] usbserial: USB Serial support registered for
> pl2303
> [Wed Feb 9 11:38:51 2022] pl2303 3-2:1.0: unknown device type, please
> report to linux-usb@xxxxxxxxxxxxxxx
Apparently Ubuntu has backported
894758d0571d ("USB: serial: pl2303: tighten type HXN (G) detection")
to their 5.13 kernel, but not yet
aa5721a9e0c9 ("USB: serial: pl2303: fix GC type detection")
This has been fixed in all upstream stable trees since 5.15.6.
I have no idea when Ubuntu will fix this in their tree. You'll need to
ask them.
> So, in my humble opinion, we will just have to wait for the 5.16 to
> appear in the standard Ubuntu repositories.
Anything newer than 5.15.6 should do.
Johan
