[chirp_users] chirp connecting to UV-5R from Ubuntu 16.04 on Lenovo Carbon X1

[Aubrey Turner]

Just out of curiosity, why did you choose to run such an old 
distribution (16.04) of Ubuntu on a relatively new laptop?

I just happened to receive a marketing email from Lenovo this morning 
(I've bought a few PCs from them in the past) that included the Carbon 
X1 Gen 7 and I looked it up.  It has USB 3.1 ports (2x Gen 2 Type-C with 
Thunderbolt and 2x Gen 1).  I'd think that you'd need the latest 
possible version of Ubuntu (and the Linux kernel) to support this laptop.

Looking at the Ubuntu certification page for the Carbon X1, it shows as 
having been tested with Ubuntu 18.04 LTS 64-bit.

Your symptoms (device appears, disappears, works sometimes but not 
others) could be due to instability in the underlying kernel support for 
the motherboard and/or USB controllers.

Another issue to investigate is the use of USB 3.1 ports.  In the past 
there have been issues with USB 3 ports causing RF interference with 
devices that are connected.  This mostly manifests with wireless 
keyboards and mice, but it wouldn't surprise me if it was an issue 
here.  The common fix is to use a USB extension cable to move the USB 
device away from the port.


On 2/17/20 7:39 AM, Kheong Sann CHAN wrote:
> I had connected the cable, tried to access it from chirpw causing it 
> to disconnect a few times, by the time I did dmesg. I removed out the 
> multiple connect/disconnect lines from dmesg output because the 
> information was mostly duplicate.
>
> On Mon, Feb 17, 2020 at 7:24 PM Tom Henderson <Tom at henderson4.us 
> <mailto:Tom at henderson4.us>> wrote:
>
>     Just double checking here. The log messages below show the cable
>     connecting, and then disconnecting. Had you disconnected the cable
>     again before running dmesg, or did the cable fail?
>
>     Tom Henderson
>
>     On 2/16/20 11:56 PM, Kheong Sann CHAN wrote:
>>     The tty port is found when I plug it in:
>>     $ dmesg | grep tty
>>     [ 7527.188154] usb 1-2: pl2303 converter now attached to ttyUSB0
>>     [ 7548.490452] pl2303 ttyUSB0: pl2303 converter now
>>     _*disconnected*_ from ttyUSB0
>>
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