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
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