Messages in this thread |  | | | Date | Wed, 16 Sep 2009 20:19:10 +0200 | | From | Andreas Mohr <> | | Subject | Re: usb autosuspend is history after S2R (also on 2.6.31; UVC?) |
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Hi,
On Tue, Sep 15, 2009 at 09:48:28PM +0200, Oliver Neukum wrote: > Am Dienstag, 15. September 2009 20:51:45 schrieb Andreas Mohr: > > > So, does the uvc driver need a bit of handholding here? > > It likely shouldn't simply forget about its autosuspend status after > > resume... > > Can you please provide what you get when you read the "level" file > of the device's power directory?
After boot:
# cat 5-5/product Acer Crystal Eye webcam # cat 5-5/power/level on
After re-enabling disabled /etc/rc.local autosuspend tweaks:
# cat 5-5/power/level auto
> Secondly, please verify, that it works before the STR cycle and post
It does:
Recent USB suspend statistics Active Device name 0.0% USB device 5-5 : Acer Crystal Eye webcam (SuYin) 0.0% USB device usb5 : EHCI Host Controller (Linux 2.6.31 ehci_hcd) 0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) 0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) 0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) 0.0% USB device usb1 : UHCI Host Controller (Linux 2.6.31 uhci_hcd)
> a syslog of a suspend/resume cycle with CONFIG_USB_DEBUG and > only this device attached if possible. Thirdly, please verify that only > uvc is affected.
Hmmmm... I just did the first S2R after boot, and the result is this:
Recent USB suspend statistics Active Device name 0.0% USB device 5-5 : Acer Crystal Eye webcam (SuYin) 0.0% USB device usb5 : EHCI Host Controller (Linux 2.6.31 ehci_hcd) 0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) 0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) 0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) 0.0% USB device usb1 : UHCI Host Controller (Linux 2.6.31 uhci_hcd) # cat 5-5/power/level auto
Weird. Either it was always working and I'm just _very_ wrong, or it's erratic and gets reset every couple S2Rs only.
Anyway, doesn't change the fact that the r8169 WOL PHY setting is toast after every S2R as well ;) # ethtool -s eth0 wol d # ethtool eth0 ... Wake-on: d ...
which then reverts to # ethtool eth0 ... Wake-on: g ... thus wasting a wee bit of power(, too).
> > Or would Matthew's uvc autosuspend patch > > http://osdir.com/ml/fedora-extras-commits/2009-07/msg06079.html > > help here? > > Please test it. It shouldn't work, but if it works there's a fundamental > flaw.
Hmm, rebuild (of patch plus CONFIG_USB_DEBUG) would take >> 2 hours, will have to wait until later.
Thanks,
Andreas
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