[LAU] USB on ThinkPad T520
robin at gareus.org
Sun May 13 06:57:26 UTC 2012
On 05/13/2012 03:13 AM, plutek wrote:
> From: Karsten Wiese <fzuuzf at googlemail.com>
> Date: Sat, 12 May 2012 23:18:22 +0200
>> 2012/5/12 Clemens Ladisch <clemens at ladisch.de>:
>>> 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.
> hmmmm.... shame.... lenovo specs said, of course, "USB 2.0".
> any way around this currently?
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