Re: xHCI problem? [was Re: Erratic USB device behavior and device loss]

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I am not sure if the logs ever reached the list. I've uploaded the logs here [1]
for convenience.

[1] https://people.debian.org/~rrs/tmp/usb-xhci-dmesg.txt.gz



On Fri, 2016-08-19 at 15:56 +0530, Ritesh Raj Sarraf wrote:
> Hello Mathia,
> 
> On Fri, 2016-08-19 at 11:42 +0300, Mathias Nyman wrote:
> > 
> > > 
> > > 
> > > It'd help to know if it really is a bug or something else.
> > 
> > Could you add xhci debugging?. The current logs mainly show usb core
> > reporting errors on urbs returned (or timeout) from xhci.
> > 
> > xhci debugging can be added with
> > echo -n 'module xhci_hcd =p' > /sys/kernel/debug/dynamic_debug/control
> > Make sure debugfs is mounted before.
> > 
> 
> There's a lot of debugging output. I've attached the dmesg output in this
> email.
> 
> > 
> > There is a scattergather fix in 4.8-rc1, but it has another regression, so
> > waiting for 4.8-rc3 and retrying with it could make sense.
> > Not sure if that fix is related, but should be fairly easy to try before
> > digging too
> > deep into this
> 
> Okay! I'll try out rc3 when it is out. Meanwhile, if there is anything
> interesting in the logs, please let me know.
> 
> 
> PS: The logs are from a 4.7.1 stable kernel.
> 
> 
> Thanks,
> Ritesh
> 
- -- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
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