Hi Paul,
I haven't touched this stuff in years.
In my memory that kind of error indicates an underlying problem with the
usb layer.
You want to look at errors from the usb layers around this.
You might also have bad hardware of course.
It might be some power saving settings mistakenly shutting down the usb
devices too.
But I'm not up to date on it so unfortunately you'll need to google it!
All 'error from flowcontrol urb' means there was an error from the usb
packet of some form.
On Mon, 28 Jun 2021 at 14:52, Paul Wang <pau...@tr...> wrote:
> Hi guys,
>
> I am not sure if I am asking questions at the right place.
>
>
>
> I have a problem on ftdi_sio driver of Linux 4.14 running on hardware
> based on FreeScale’s iMX6ull.
>
>
>
> The ftdi_sio driver works fine at the beginning and keeps sending |
> receiving data for a few hours, until all of a sudden, there is an error:
>
> *ftdi_sio ttyUSB0: error from flowcontrol urb*
>
> Then ttyUSB0 either stops working, or disconnected as:
>
> *ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from
> ttyUSB0*
>
> or the system has received a reboot signal.
>
> This is happening almost 100% , but the time of occurring may be variant.
>
>
>
> From the Internet, I can see there are similar bug reports from others,
> but they seem not having a solid fix.
>
> I appreciate any information or helps from you.
>
>
>
> Regards.
>
> Paul Wang.
>
>
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