Re: USB Autosuspend

[Markus Rechberger <linuxusb.ml@sundtek.de>]

On Mon, 2024-11-18 at 22:11 -0500, Alan Stern wrote:
> On Mon, Nov 18, 2024 at 04:13:29PM +0800, Markus Rechberger wrote:
> > Hi,
> > 
> > we repeatedly received issues from customers with usb autosuspend,
> > our
> > devices are randomly disconnected on some systems, it did not
> > happen
> > many times but if more than 4-5 customers report this there's
> > usually
> > some real issue behind that.
> > 
> > I'm asking here because the Libreelec distribution recently got my
> > attention that they seem to set usb autosuspend to -1 during boot
> > time
> > so they probably figured that out much earlier with other devices.
> > I have never experienced that issue on an Ivy or Haswell based
> > system.
> > 
> > Were there some issues with particular kernel versions in the past
> > or
> > are there any issues known in general with USB autosuspend?
> 
> I'm not aware of any such issues.
> 
> Do you think you can get kernel debugging logs from your customers 
> showing examples of these disconnections?
> 

one customer just replied his problem is gone since he disabled auto
suspend (that was the latest one). He tested it since the last mail to
the mailing list.

Do you want any particular logfiles / logging from him?

Best Regards,
Markus

> Alan Stern
>