On Mon, Sep 24, 2012 at 09:13:42PM +0300, Adrian Sandu wrote: > > I'll whip up some patches that allow you to disable USB 3.0 Link PM for > > the VIA hub and we'll see if that helps. Or you could downgrade to the > > 3.4 kernel and see if that helps, since USB 3.0 Link PM went into 3.5. > > Thanks Sarah. I tried in 3.4.11 to .. about the same thing .. > http://d3xt3r01.tk/~dexter/usbmon.trace.txt contains a new trace. Uh, are you sure you're running 3.4.11? Because this output from the log snippet you sent: > 2012-09-24T21:08:57.203739+03:00 d3xt3r01 kernel: [ 249.104503] usb 2-2.2: Parent hub missing LPM exit latency info. Power management will be impacted. Is not present in the USB core until 3.5-rc1: sarah@xanatos:~/git/kernels/xhci$ git blame drivers/usb/core/hub.c 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 214) /* All USB 3.0 must support LPM, but we need their max exit latency 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 215) * information from the SuperSpeed Extended Capabilities BOS descriptor. 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 216) */ 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 217) if (!udev->bos->ss_cap) { 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 218) dev_warn(&udev->dev, "No LPM exit latency info found. " 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 219) "Power management will be impacted.\n"); 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 220) return 0; 51e0a012 (Sarah Sharp 2012-02-20 12:02:19 -0800 221) } sarah@xanatos:~/git/kernels/xhci$ git describe --contains --match="v*" 51e0a01 v3.5-rc1~149^2~6^2~9 So can you double check you were running 3.4.11 on your last test? Sarah Sharp -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
