Re: [linux-audio-user] Tascam US-122, Laptop and Keyboard

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To: A list for linux audio users <linux-audio-user@...>
Date: Thursday, March 24, 2005 - 8:42 pm

On Thu, 2005-03-24 at 14:03 -0500, Lee Revell wrote:

There's two similar (except for hardware) user experiences being
reported here... in my case I was able to eliminate "shared IRQ" issues.
By issuing the "acpi_irq_balance" kernel parameter. Currently my irq
assignment is:

0: 228818 XT-PIC timer 0/28818
1: 617 XT-PIC i8042 0/617
2: 0 XT-PIC cascade 0/0
7: 63 XT-PIC Intel 82801DB-ICH4, eth0 0/63
8: 2 XT-PIC rtc 0/2
9: 11329 XT-PIC acpi, radeon@pci:0000:01:00.0 0/11329
10: 727 XT-PIC uhci_hcd:usb2, ehci_hcd:usb4 0/727
11: 3 XT-PIC uhci_hcd:usb1, uhci_hcd:usb3, ohci1394
12: 13706 XT-PIC i8042 1/13706
14: 1701 XT-PIC ide0 0/1701
15: 5553 XT-PIC ide1 0/5553

It doesn't seem to matter what USB bus it's on (or for that matter if
irq's are "reshuffled" or not) so I'm suspicious of some intrinsic
kernel or driver issue (barring some weird hardware hangup). I've got
the week off so I'll do some further testing (I also have the builtin
ac97 chip and another USB device (emi 2|6).

> Is this the case for everyone who is having the problem?

As reported above, eth0 is on another IRQ. Also all my kernels are
patched with Ingo Molnar's RP patches ( through 2.6.12.rcX). I'm
unthreading whatever IRQ the device is on (10 or 11 and sometimes both).

Ryan Gallagher

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Messages in current thread:
Re: [linux-audio-user] Tascam US-122, Laptop and Keyboard, Steve Fosdick, (Thu Mar 24, 2:11 am)
Re: [linux-audio-user] Tascam US-122, Laptop and Keyboard, Clemens Ladisch, (Thu Mar 24, 9:17 am)
Re: [linux-audio-user] Tascam US-122, Laptop and Keyboard, Ryan Gallagher, (Thu Mar 24, 6:28 pm)
Re: [linux-audio-user] Success: Tascam US-122 and Laptop, Steve Fosdick, (Sat Mar 26, 1:32 pm)
Re: [linux-audio-user] Tascam US-122, Laptop and Keyboard, Ryan Gallagher, (Thu Mar 24, 8:42 pm)