On Thu, 3 Nov 2011, Steve Calfee wrote: > > It means the kernel told your EHCI controller to turn off its periodic > > schedule, but the controller didn't do it. There's a workaround in the > > kernel which may fix this, but it wasn't enabled (currently it is used > > only for Intel controllers). > > > > I think this may be a hardware problem. I think it was in amd SB600 > and SB700 chipsets. Is that your hardware? > > It has been around forever. Someone fixed the spelling in the error > message and it makes Googling for help more difficult. It used to > contain the word "handhake" in the message, very distinctive for > searches, but don't let google correct it for you before the search. > > You might start looking here for others with problems:: > http://fixunix.com/kernel/551898-2-6-27-ehci-bug-amd-770nb-sb700-southbridge-usb-lockup.html > > Unfortunately, I am not sure it has ever been fixed. There already are fixes for two different bugs in these host controllers: a PLL quirk that requires setting a bit in the SMBUS device's config space, and overwriting memory when the frame list contains an entry with the T bit set. Neither of these are what Anton is seeing. Alan Stern -- 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
