13 May
2012
13 May
'12
8:15 p.m.
On 05/13/2012 07:45 PM, plutek wrote:
From: Robin Gareus <robin(a)gareus.org>
Date: Sun, 13 May 2012 08:57:26 +0200
No, not that I can tell. "0000:00:1d.0" is the USB hub/controller, right?
The idea is to use the uhci_hcd (USB1) driver instead of ehci_hcd
(USB2). -- Maybe the module is not loaded?
`lsmod | grep uhci_hcd`
`ls /sys/bus/pci/drivers/uhci_hcd/`
If they're modules: `rmmod ehci_hcd; modprobe uhci_hcd`; that'll force
all USB ports into 1.X mode; may be worth a try before playing with
dedicated per port bindings.
Anyway, there might be something else going on: as both Karsten and
Clemens noted, these "Intel Corporation Cougar Point [..] controllers
use a different driver" and "There have been fixes recently. Try
updating the kernel."
robin
On 05/13/2012 03:13 AM, plutek wrote:
after i do:
# cd /sys/bus/pci/drivers/ehci_hcd/
# echo -n 0000:00:1d.0 > unbind
...the USB audio device no longer shows up in qjackctl.
did i misunderstand? From: Karsten Wiese
<fzuuzf(a)googlemail.com>
Date: Sat, 12 May 2012 23:18:22 +0200
yes,
http://lists.linuxaudio.org/pipermail/linux-audio-dev/2010-October/029511.h… 2012/5/12 Clemens Ladisch
<clemens(a)ladisch.de>de>:
> plutek wrote:
>> i've been running AVLinux5.0.3 on a ThinkPad T61p for a while now....
>> with an ART USB Dual Tube Pre, i can run Jack at 64 frames, 2 periods
>>
>> now i've got a new ThinkPad T520, and if i start jack on USB at 64*2
>> i get hundreds of xruns in seconds.
>
> Both machines run (I assume) the same software? Then the problem is
> with the hardware, or its drivers.
>
> Please show the output of lspci and the contents of /proc/interrupts.
>
Thinkwiki says its got a QM67. That does USB 1.1 via the "Rate
matching hub" and EHCI.
I guess linux's hub driver is the culprit.
hmmmm.... shame.... lenovo specs said, of course, "USB 2.0".
mrph.
any way around this currently?