Messages in this thread | | | From | Andrey Borzenkov <> | Subject | Re: [linux-usb-devel] 2.6.17: dmesg flooded with "ohci_hcd 0000:00:02.0: wakeup" | Date | Sun, 18 Jun 2006 23:22:49 +0400 |
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On Sunday 18 June 2006 22:16, David Brownell wrote: > On Sunday 18 June 2006 10:29 am, Andrey Borzenkov wrote: > > On Sunday 18 June 2006 20:29, David Brownell wrote: > > > An alternative (but post-boot) workaround _should_ be > > > > > > echo disabled > /sys/bus/pci/devices/0000:00:02.0/power/wakeup > > Did that work? >
No.
{pts/1}% LC_ALL=C sudo sh -c 'echo -n disabled > /sys/bus/pci/devices/0000:00:02.0/power/wakeup' sh: line 0: echo: write error: Invalid argument
because "disabled" is apparently spelled right, this means it bails out at
if (!device_can_wakeup(dev)) return -EINVAL;
which is also confirmed by the fact that reading it returns nothing.
> > This is Tohiba Portege 4000 notebook. So far I did not have any USB > > related issues at least since 2.6.12. And true, I do not have any devices > > plugged in. > > It's the usual case of fixing one bug triggering another, in your case > because the fix ran into a previously unseen hardware bug. One other > way to work around that bug would be disabling CONFIG_PM, but I suspect > you don't want to go that route... >
Well, after I have it doing STR just fine, I'd rather keep it :)
> > Here you are. I am still puzzled where all these "suspends" come from - I > > did not try any suspend in the meantime ... > > It's the driver putting the controller into a low power state. Your > hardware seems to have a bug whereby that doesn't work correctly, > making it immediately leave that state. (And the driver messaging is > fine for what should be an uncommon event; plus it highlighted your > hardware bug.) Notice the "initreset quirk" message -- another bug > in that hardware. Workarounds in both cases are simple. > > When I get a moment, I'll have a patch for you to try. Meanwhile, > either workaround I showed above should prevent the attempt to enter > that low power mode. >
Unfortunately one of them does not work and another is not really feasible :( I guess I run 2.6.16 for a while :)
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