From: Robin Gareus <robin@xxxxxxxxxx> Date: Sun, 13 May 2012 08:57:26 +0200 > On 05/13/2012 03:13 AM, plutek wrote: >> From: Karsten Wiese <fzuuzf@xxxxxxxxxxxxxx> >> Date: Sat, 12 May 2012 23:18:22 +0200 >> >>> 2012/5/12 Clemens Ladisch <clemens@xxxxxxxxxx>: >>>> 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". >> mrph. >> >> any way around this currently? > > yes, > > http://lists.linuxaudio.org/pipermail/linux-audio-dev/2010-October/029511.html after i do: # cd /sys/bus/pci/drivers/ehci_hcd/ # echo -n 0000:00:1d.0 > unbind ...the USB audio device no longer shows up in qjackctl. did i misunderstand? thanks... cheers! .pltk. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
