17 Aug
2011
17 Aug
'11
10:44 a.m.
On Wed, 17 Aug 2011 09:59:40 +0200 (CEST)
Cedric Roux <sed(a)free.fr> wrote:
----- Original Message -----
Thanks Cedric, both these methods show which usb controller the device
is attached to. But I still have a problem; I have 4 "USB Controller" devices:
$ lspci -v |grep -i "usb controller" -A 2
00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 02)
(prog-if 00 [UHCI])
Subsystem: Acer Incorporated [ALI] Device 0090
Flags: bus master, medium devsel, latency 0, IRQ 23
--
00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 02)
(prog-if 00 [UHCI])
Subsystem: Acer Incorporated [ALI] Device 0090
Flags: bus master, medium devsel, latency 0, IRQ 19
--
00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 02)
(prog-if 00 [UHCI])
Subsystem: Acer Incorporated [ALI] Device 0090
Flags: bus master, medium devsel, latency 0, IRQ 18
--
00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 02)
(prog-if 00 [UHCI])
Subsystem: Acer Incorporated [ALI] Device 0090
Flags: bus master, medium devsel, latency 0, IRQ 16
--
00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 02)
(prog-if 20 [EHCI])
Subsystem: Acer Incorporated [ALI] Device 0090
Flags: bus master, medium devsel, latency 0, IRQ 23
and 4 physical USB ports on my laptop, but whichever I plug the soundcard into,
it's allways seen on the 1d.7 controller, which seems to be the only USB2 and of
course the one with the highest IRQ. However, when I try plugging in a USB bluetooth
dongle in different physical ports, it's seen on different Controllers by dmesg. So
with
the dongle I have actually found which physical port is the 1d.3, which is the one
with the lowest IRQ, but when I attach the soundcard to it dmesg reports
it on 1d.7. How's that possible?
BTW is it possible to reassign IRQ somehow on a laptop? As I said previously
the IRQ 16 seems to be shared by the video card, and I read that's not good.
thanks again to everyone for help so far,
renato
From: "Renato"
<rennabh(a)gmail.com>
To: "Clemens Ladisch" <clemens(a)ladisch.de>
Cc: "linux-audio-user" <linux-audio-user(a)lists.linuxaudio.org>
Sent: Tuesday, August 16, 2011 5:55:52 PM
Subject: Re: [LAU] setting up hardware priority
On Tue, 16 Aug 2011 17:34:40 +0200
Clemens Ladisch <clemens(a)ladisch.de> wrote:
> Renato wrote:
> > Hello, I'm trying to find out if plugging my USB soundcard in
> > different USB ports of my laptop makes any difference. If I got
> > it
> > right, I should choose the one with the lowest IRQ. So, with
> > "lspci
> > -v" I can see I have 4 "USB Controller" devices, each with
their
> > own IRQ (lowest one is 16 which seems to be shared by video
> > card...) - but how do I know which one my sound card is plugged
> > into?
In /sys/devices/pciXXXXX, try:
for i in `find|grep usb|grep product`; do echo $i; cat $i; done
I only have /sys/devices/pci0000:00 here.
It gives the name of the product, maybe it can help.
Try other files too. For my usb key, I see:
/sys/devices/pci0000:00/0000:00:1a.7/usb1/1-3> ls
1-3:1.0 bDeviceSubClass configuration idProduct
remove authorized bmAttributes descriptors
idVendor serial avoid_reset_quirk bMaxPacketSize0
dev manufacturer speed bcdDevice
bMaxPower devnum maxchild subsystem
bConfigurationValue bNumConfigurations devpath power
uevent bDeviceClass bNumInterfaces driver
product urbnum bDeviceProtocol busnum
ep_00 quirks version
Also, run 'dmesg' when you plug your audio card and see what it says
(if it says something).