Re: [LAU] Something interesting about kernel 3.6.5-rt14

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To: <linux-audio-user@...>
Date: Sunday, November 4, 2012 - 11:40 am

On 11/03/2012 10:05 PM, Ralf Mardorf wrote:

Now you've got:

echo -n "0000:00/0000:00:13.2" > /sys/bus/pci/drivers/ohci_hcd/unbind
echo -n "0000:00/0000:00:13.4" > /sys/bus/pci/drivers/ohci_hcd/unbind

Which yields:

> tuning: line 28: echo: write error: No such device
> tuning: line 29: echo: write error: No such device

Maybe you could try:

echo -n "0000:00:13.2" > /sys/bus/pci/drivers/ohci_hcd/unbind
echo -n "0000:00:13.4" > /sys/bus/pci/drivers/ohci_hcd/unbind

You should also check which driver the USB ports are using, ohci, ehci
or uhci. You can check this with cat /proc/interrupts | grep usb for
instance:

cat /proc/interrupts | grep usb
16: 39179 307 IO-APIC-fasteoi uhci_hcd:usb3, mmc0,
firewire_ohci, jmb38x_ms:slot0, eth1, nvidia
17: 0 0 IO-APIC-fasteoi uhci_hcd:usb4
18: 0 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb7
19: 0 0 IO-APIC-fasteoi uhci_hcd:usb8
20: 9 9 IO-APIC-fasteoi ehci_hcd:usb2, uhci_hcd:usb5
22: 0 0 IO-APIC-fasteoi uhci_hcd:usb6

As you can see the bus ID's get prepended with ohci_hcd, ehci_hcd or
uhci_hcd. So you have to write your bus ID's to the corresponding unbind
file. In your case the one in /sys/bus/pci/drivers/ohci_hcd/.

Regards,

Jeremy

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Messages in current thread:
[LAU] Something interesting about kernel 3.6.5-rt14, Ralf Mardorf, (Sat Nov 3, 9:41 am)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Florian Paul Schmidt, (Sat Nov 3, 10:32 am)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Ralf Mardorf, (Sat Nov 3, 11:24 am)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Ralf Mardorf, (Sat Nov 3, 12:24 pm)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Jeremy Jongepier, (Sun Nov 4, 11:40 am)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Ralf Mardorf, (Sun Nov 4, 12:42 pm)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Jeremy Jongepier, (Sat Nov 3, 12:43 pm)
Re: [LAU] Something interesting about kernel 3.6.5-rt14, Ralf Mardorf, (Sat Nov 3, 12:57 pm)