Re: [LAU] USB on ThinkPad T520

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From: Karsten Wiese <fzuuzf@...>

To: Clemens Ladisch <clemens@...>

Cc: <linux-audio-user@...>

Subject: Re: [LAU] USB on ThinkPad T520

Date: Saturday, May 12, 2012 - 9:18 pm

2012/5/12 Clemens Ladisch :

quoted text

> 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.

Karsten
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Messages in current thread:

[LAU] USB on ThinkPad T520, plutek, (Sat May 12, 2:52 pm)

Re: [LAU] USB on ThinkPad T520, Clemens Ladisch, (Sat May 12, 6:31 pm)

Re: [LAU] USB on ThinkPad T520, plutek, (Sun May 13, 1:12 am)

Re: [LAU] USB on ThinkPad T520, Clemens Ladisch, (Sun May 13, 9:07 am)

Re: [LAU] USB on ThinkPad T520, Karsten Wiese, (Sat May 12, 9:18 pm)

Re: [LAU] USB on ThinkPad T520, plutek, (Sun May 13, 1:13 am)

Re: [LAU] USB on ThinkPad T520, Robin Gareus, (Sun May 13, 6:57 am)

Re: [LAU] USB on ThinkPad T520, plutek, (Sun May 13, 5:45 pm)

Re: [LAU] USB on ThinkPad T520, Robin Gareus, (Sun May 13, 6:15 pm)

Re: [LAU] USB on ThinkPad T520, Monty Montgomery, (Sun May 13, 7:28 pm)

Re: [LAU] USB on ThinkPad T520, Robin Gareus, (Sun May 13, 8:06 pm)

Re: [LAU] USB on ThinkPad T520, Monty Montgomery, (Sun May 13, 8:40 pm)

Re: [LAU] USB on ThinkPad T520, plutek, (Mon May 14, 4:31 pm)

Re: [LAU] USB on ThinkPad T520, david, (Mon May 14, 6:23 pm)

Re: [LAU] USB on ThinkPad T520, plutek, (Mon May 14, 7:20 pm)

Re: [LAU] USB on ThinkPad T520, plutek, (Mon May 14, 7:22 pm)

Re: [LAU] USB on ThinkPad T520, david, (Wed May 16, 8:25 am)

Re: [LAU] USB on ThinkPad T520, hermann, (Wed May 16, 8:33 am)

Re: [LAU] USB on ThinkPad T520, david, (Thu May 17, 5:45 pm)

Re: [LAU] USB on ThinkPad T520, Tim Westbrook, (Fri May 18, 6:57 am)

Re: [LAU] USB on ThinkPad T520, Clemens Ladisch, (Sun May 13, 8:29 pm)

Re: [LAU] USB on ThinkPad T520, plutek, (Sun May 13, 6:32 pm)

Re: [LAU] USB on ThinkPad T520, Monty Montgomery, (Sun May 13, 2:56 am)