[PLUG] [OT ? ?? ???] Linux and computer literacy

Richard Owlett rowlett at cloud85.net
Tue Jun 19 15:15:10 UTC 2018


Plug in one end of cable
[ 1882.167155] usb 4-1.1.4: new high-speed USB device number 4 using 
ehci-pci
[ 1882.278177] usb 4-1.1.4: New USB device found, idVendor=067b, 
idProduct=25a1
[ 1882.278183] usb 4-1.1.4: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[ 1882.278187] usb 4-1.1.4: Product: USB Transfer Cable
[ 1882.278191] usb 4-1.1.4: Manufacturer: Prolific Technology Inc.
[ 1882.301597] plusb 4-1.1.4:1.0 usb0: register 'plusb' at 
usb-0000:00:1d.0-1.1.4, Prolific PL-2301/PL-2302/PL-25A1/PL-27A1, 
1e:1c:40:06:14:68
[ 1882.301642] usbcore: registered new interface driver plusb
[ 1882.306204] plusb 4-1.1.4:1.0 enp0s29u1u1u4: renamed from usb0
[ 1882.333434] IPv6: ADDRCONF(NETDEV_UP): enp0s29u1u1u4: link is not ready


Plug in other end of cable also
[ 1887.342562] plusb 4-1.1.4:1.0 enp0s29u1u1u4: kevent 12 may have been 
dropped
[ 1887.342580] plusb 4-1.1.4:1.0 enp0s29u1u1u4: kevent 12 may have been 
dropped
[ 1887.344176] plusb 4-1.1.4:1.0 enp0s29u1u1u4: kevent 12 may have been 
dropped
[ 1887.344197] plusb 4-1.1.4:1.0 enp0s29u1u1u4: kevent 12 may have been 
dropped
[ 1906.022817] usb 4-1.1.3: new high-speed USB device number 5 using 
ehci-pci
[ 1906.133374] usb 4-1.1.3: New USB device found, idVendor=067b, 
idProduct=25a1
[ 1906.133381] usb 4-1.1.3: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[ 1906.133385] usb 4-1.1.3: Product: USB Transfer Cable
[ 1906.133389] usb 4-1.1.3: Manufacturer: Prolific Technology Inc.
[ 1906.134334] plusb 4-1.1.3:1.0 usb0: register 'plusb' at 
usb-0000:00:1d.0-1.1.3, Prolific PL-2301/PL-2302/PL-25A1/PL-27A1, 
1e:1c:40:06:14:68
[ 1906.152962] plusb 4-1.1.3:1.0 enp0s29u1u1u3: renamed from usb0
[ 1906.185788] IPv6: ADDRCONF(NETDEV_UP): enp0s29u1u1u3: link is not ready
[ 1911.405952] plusb 4-1.1.3:1.0 enp0s29u1u1u3: kevent 12 may have been 
dropped
[ 1911.405966] plusb 4-1.1.3:1.0 enp0s29u1u1u3: kevent 12 may have been 
dropped
[ 1911.407590] plusb 4-1.1.3:1.0 enp0s29u1u1u3: kevent 12 may have been 
dropped
[ 1911.407614] plusb 4-1.1.3:1.0 enp0s29u1u1u3: kevent 12 may have been 
dropped
root at debian-jan13:/home/richard#




On 06/19/2018 08:12 AM, Russell Senior wrote:
> Just as an example of something remotely like what you might expect to see
> in the dmesg output, here's what I see when I plug a usb-ethernet adapter
> into a Ubuntu 16.04 USB 3 port:
> 
> [...]
> [2793539.351788] usb 3-2: new SuperSpeed USB device number 2 using xhci_hcd
> [2793539.378837] usb 3-2: New USB device found, idVendor=0b95,
> idProduct=1790
> [2793539.378846] usb 3-2: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [2793539.378851] usb 3-2: Product: AX88179
> [2793539.378856] usb 3-2: Manufacturer: ASIX Elec. Corp.
> [2793539.378861] usb 3-2: SerialNumber: 000050B61F4505
> [2793540.800220] ax88179_178a 3-2:1.0 eth0: register 'ax88179_178a' at
> usb-0000:00:14.0-2, ASIX AX88179 USB 3.0 Gigabit Ethernet, 00:50:b6:1f:45:05
> [2793540.801218] usbcore: registered new interface driver ax88179_178a
> [2793540.842186] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> [2793541.169959] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
> 
> The link is not ready because I haven't connected an ethernet cable to the
> adapter, nor an active device to the other end of the ethernet cable.
> Note, in my case I see the ethernet interface is named eth0. Your mileage
> may vary.
> 
> On Tue, Jun 19, 2018 at 5:27 AM, Russell Senior <russell at personaltelco.net>
> wrote:
> 
>> So, do you see the usbN interface or not?
>>
>> On Tue, Jun 19, 2018 at 5:12 AM, Richard Owlett <rowlett at cloud85.net>
>> wrote:
>>
>>> On 06/19/2018 06:45 AM, Russell Senior wrote:
>>>
>>>> Here is someone 10 years ago, using debian:
>>>>
>>>>
>>>> https://jonmccune.wordpress.com/2008/12/09/prolific-pl-25a1-
>>>> usb-to-usb-bridge-in-linux/
>>>>
>>>
>>> Now bookmarked. I read. It stated in part "... a new usbX network
>>> interface (view with `ifconfig -a`)."
>>> I tried and was given much - need to read up to understand what it tells
>>> me.
>>>
>>> Then I read the rest of your post ;/
>>>
>>>
>>>
>>>> What your distribution does (even if it is still Debian) might be
>>>> different
>>>> today, but it looks like it creates a network interface (usbN, in this
>>>> case).  Again, your mileage might vary, but the dmesg output should tell
>>>> you what interface name is assigned.
>>>>
>>>> You could also compare the output before and after plugging in the cable
>>>> of
>>>> the command: ip addr
>>>>
>>>> For example:
>>>>
>>>>    ip addr > /tmp/before-plugging.txt
>>>>    [plug in device]
>>>>    ip addr > /tmp/after-plugging.txt
>>>>    diff -u /tmp/before-plugging.txt /tmp/after-plugging.txt
>>>>
>>>> The difference should be the newly created network interface.
>>>>
>>>
>>> _______________________________________________
>>> PLUG mailing list
>>> PLUG at pdxlinux.org
>>> http://lists.pdxlinux.org/mailman/listinfo/plug
>>>
>>
>>
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> 





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