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Am Dienstag, 15. April 2008 22:41:19 schrieb Lev A. Melnikovsky: > > On Wed, 16 Apr 2008 at 12:02am, Oliver Neukum wrote: > > ON> Am Dienstag, 15. April 2008 21:56:24 schrieb Lev A. Melnikovsky: > ON> > The oddest peculiarity for me is the hysteretic difference between #1 and > ON> > #3 states. I mean experimental data (hda throughput) depends not on the > ON> > state (hardware/loaded modules), but on the path we followed. > ON> > ON> Did you compile with CONFIG_USB_SUSPEND? > > # CONFIG_USB_SUSPEND is not set > > Does this explain something? EHCI should not scan an empty async. However this manufacturer has shown a liberal attitude about conforming with specifications. If the root hub is suspended, it can't do DMA. So it might help. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | |||||||||
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