On Sun, Sep 22, 2013 at 12:38:56PM -0400, Alan Stern wrote:
> > gandalfthegreat:/sys/bus/usb/devices/3-1.6/power# grep . *
> > active_duration:61227648
> > async:enabled
> > autosuspend:2
> > autosuspend_delay_ms:2000
> > connected_duration:66830880
> > control:auto
> > level:auto
> > persist:1
> > runtime_active_kids:0
> > runtime_active_time:18870052
> > runtime_enabled:enabled
> > runtime_status:active
> > runtime_suspended_time:5324088
> > runtime_usage:0
>
> This all looks correct.
Since then, I've confirmed that I don't have the problem some time after
reboot. It may be that the device doesn't seem to sleep well after I've used
it once.
What's interesting, is that I see this when power is plugged in:
Power est. Events/s Category Description
8.18 W 100.0% Device USB device: Yubico Yubikey II (Yubico)
8.13 W 100.0% Device USB device: Integrated Camera (Chicony Electronics Co., Ltd.)
Somehow I know that my Yubikey isn't using 8W, so powertop numbers need to
be taken with a grain of salt.
Once I go to batteries, I see this:
Summary: 760.1 wakeups/second, 718.9 GPU ops/seconds, 0.0 VFS ops/sec and 6.9% CPU use
Power est. Usage Events/s Category Description
8.32 W 100.0% Device USB device: Yubico Yubikey II (Yubico)
2.52 W 73.3% Device Display backlight
So at least for now, the camera does sleep ok, until later when it probably won't again.
I'm somehow thinking there is a driver or hardware problem when the device
does get stuck in a mode where it won't sleep properly again until the next
reboot (just unloading/loading the driver does not fix this).
> > Any ideas?
>
> You might get more information from a kernel with CONFIG_USB_DEBUG
> enabled. Especially if you add
>
> #define VERBOSE_DEBUG
>
> to drivers/usb/core/driver.c before the first #include line.
Do you think thaty would help debug the problem above, or not really? I'm
starting to think that the USB layer is not at fault, although I could be
wrong I suppose.
Thanks,
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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