Tim: This has nothing to do with USB-3. You can tell from the log:
Dec 6 13:33:29 twpsamlinux kernel: [ 512.148960] usb 3-1: new full-
speed USB device number 2 using ohci-pci
OHCI is strictly USB-1.1. However, you have not provided nearly enough
useful information to tell what's going wrong.
On Sat, 6 Dec 2014, Tim Passingham wrote:
I assumed that since others had supplied so much detail I didn't need to
supply any more. I was simply saying that this problem affects me as
well (as I think was requested by an earlier post),
What makes you think this is the same problem? It
The usbmon trace contains a bunch of -63 error codes. 28 of them
occurred during the 13-second trace. This code is documented to mean
During an OUT transfer, the Host Controller could not retrieve data
system memory fast enough to keep up with the USB data rate.
In other words, the PCI bus in
I can't tell what's happening with daphile. Maybe it's simply a matter
of how much network activity or disk activity or graphics activity is
going on at the time. (Of course, storing a usbmon trace creates some
disk activity of its own...)
You can check whether graphics is the issue by
Please read comment #172.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1136110
Title:
USB Audio Codec choppy playback
Status in “linux” package in Ubuntu:
Fix Released
Bug
I recently heard that USB audio works okay over USB-3 using xHCI
controllers from NEC rather than Intel; see
http://marc.info/?l=linux-usbm=139958150312402w=2
If you run lspci, it will show the manufacturers for the xHCI
controllers in your system.
--
You received this bug notification
You can find the correspondence between the PCI device list and the USB
bus list by running
grep . /sys/bus/usb/devices/usb*/serial
In addition to the NEC controller, your listing includes two EHCI (i.e.,
USB-2) controllers; they are the ones with Enhanced in the
description. Any of those
Just what I was going to suggest. Maybe you can find a true USB-2 card
somewhere else.
You can try building a kernel with the attached (untested) patch. It is
a partial fix for a bug in the xHCI driver, and it might solve your
problem on the USB-3 ports.
** Patch added: Partial fix for
There probably is a document somewhere on the Ubuntu web site explaining
how to do this. (I don't know where, and I don't use Ubuntu.) Or maybe
Joseph Salisbury can do it for you.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in
What about the dmesg output for when you plugged in the audio device?
The information in the usbmon trace suggests that the device was plugged
into a USB-3 port, not into the USB-2 PCI card.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed
I hate to say this, but the xhci_hcd in the second line means that the
port is USB-3, not USB-2.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1136110
Title:
USB Audio Codec choppy
Mark, Phil, and others:
This problem is not going to get solved any time soon. It requires a
substantial rewrite of a large portion of the ehci-hcd driver,, which
would itself take many months, and I have other things to work on.
In theory you can get around the problem by buying an add-on PCI
You know, if would help a lot if you provided some concrete data instead
of just saying it doesn't work. For example, what shows up in the
dmesg log when you plug the audio device into the PCI card? If you
collect a usbmon trace showing a noise-filled session, what do you get
(see comments
Do this: After plugging the audio device into the PCI card, run the
dmesg command and attach the output to this bug report.
Did you read comment #72 in this bug report? Follow the intructions in
the URL mentioned in that comment.
--
You received this bug notification because you are a member
Was this dmesg taken after you plugged the device into the add-on PCI
card? It shows that the device is connected to a USB-3 port.
That's the reason for your problems; the support in Linux for
isochronous transfers over USB-3 is buggy. Try plugging the device into
a USB-2 port instead.
--
You
Have you tried an add-on PCI USB-2 card? (The lsusb output suggests you
don't.) That's the combination most likely to work. If you can do
that, attach the corresponding usbmon trace.
If you don't have any USB-2 ports on the PCI card, attach a usbmon trace
using a USB-2 port on the motherboard.
Andrejs:
If you read comments #118 and #121, you would understand why the
kernel's revert is different from the patch attached to comment #118.
There is another commit currently queued for the 3.13 kernel release:
Printing the debug messages shouldn't slow down your system very much.
However, the audio driver could indeed slow down your system when a
delay occurs like this.
If you want to check whether printing the debug messages slows down your
system, all you have to do is change the system's printing
First, those are not warning messages; they are debugging messages.
Therefore they should not be stored in your system log or printed out.
Second, if you are using a USB webcam then the webcam can't send audio
data to the system if no processing is asking for it.
Third, the messages indicate
Please be more specific. Which patch causes the side effect?
Also, please attach a portion of your system log showing the warning
messages.
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
Steve: Since you're using an OHCI controller, the fixes for EHCI won't
help you. Please try the attached patch and let me know how it works.
If you can run the irqsoff tracer too, that would be great.
** Attachment added: Accept URB submissions in OHCI during underruns, with a
debugging message
Will the people who are experiencing trouble with audio devices attached
to EHCI controllers please try the attached patch? It won't fix the
underlying problems (underruns in the data stream) but it will prevent
them from causing fatal errors.
I can provide a similar patch for OHCI controllers,
Paul, what kind of USB controller is your sound card attached to (UHCI,
OHCI, or EHCI)?
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1191603
Title:
raring-updates: regression:
If it's xHCI then there's nothing I can do. If it's EHCI then the
attached patch ought to help. For debugging purpose it writes a warning
message to the kernel log whenever an underrun occurs, but it prevents
the underrun from causing a failure.
It turns out there are two bugs in the
It looks like this problem was fixed in the 3.9.5 stable kernel release
by commit 33edcea352d7c7e601a61e987b029620fed0ca4d (USB: fix latency in
uhci-hcd and ohci-hcd).
I guess the commit wasn't added to any of the 3.8.stable releases
because they were already closed. But it is present in 3.10.
Can somebody who's getting the robotic sound or related problems
please attach a usbmon trace?
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1103018
Title:
line6usb - POD Studio UX2
26 matches
Mail list logo
