* Re: Bug in Linux USB stack
[not found] <CAMRwvmJMjh35kA_mf+C_wXtQ8qGj9zzv+VB34tdYvd2dSH6Lrw@mail.gmail.com>
@ 2015-09-14 7:50 ` Mathias Nyman
0 siblings, 0 replies; only message in thread
From: Mathias Nyman @ 2015-09-14 7:50 UTC (permalink / raw)
To: Andrew Gillis, linux-usb, linux-kernel
On 12.09.2015 00:56, Andrew Gillis wrote:
> I get an error when trying to play music through USB DACs under Linux. This
> only happens with a few high end DACs and only when using a NEC uPD72020x
> chipset USB 3.0 port.
>
> The people at RedHat think it may be the NEC uPD72020x chipset is reporting
> it's capabilities incorrectly.
>
> I'm not sure why some only some DACs are effected. it may depend on their
> chipsets.
>
> There is a detailed description of the bug with traces here
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1240798
>
> Any idea what I can do to fix this?
>
Can you re-send the logs. Both dmesg with xhci debugging enabled and lsusb -v.
Clicking the links to the logs in redhat bugzilla justs says
"The paste you are looking for does not exist"
The command completion code 0x11 (17 dec) is a parameter error, indicating that xhci thinks
that some value we used in the input context is wrong.
-Mathias
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2015-09-14 7:50 ` Bug in Linux USB stack Mathias Nyman
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