Re: [LAU] setting up hardware priority

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To: Cedric Roux <sed@...>
Cc: linux-audio-user <linux-audio-user@...>
Date: Wednesday, August 17, 2011 - 8:45 am

On Wed, 17 Aug 2011 09:59:40 +0200 (CEST)
Cedric Roux 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
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Messages in current thread:
[LAU] setting up hardware priority, Renato, (Tue Aug 16, 12:39 pm)
Re: [LAU] setting up hardware priority, Clemens Ladisch, (Tue Aug 16, 3:34 pm)
Re: [LAU] setting up hardware priority, Renato, (Tue Aug 16, 3:56 pm)
Re: [LAU] setting up hardware priority, Cedric Roux, (Wed Aug 17, 7:59 am)
Re: [LAU] setting up hardware priority, Renato, (Wed Aug 17, 8:45 am)
Re: [LAU] setting up hardware priority, Clemens Ladisch, (Wed Aug 17, 12:38 pm)
Re: [LAU] setting up hardware priority, Cedric Roux, (Wed Aug 17, 9:04 am)