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Date: Fri, 8 Jun 2007 12:17:48 +0200 (CEST) From: Jiri Kosina <jikos@...os.cz> To: Robert de Rooy <robert.de.rooy@...il.com> cc: Joel.Becker@...cle.com, linux-kernel@...r.kernel.org, Greg KH <greg@...ah.com>, linux-usb-devel@...ts.sourceforge.net Subject: Re: ThinkPad T41 - Strange USB 2.0 behaviour linux-usb-devel list added On Fri, 8 Jun 2007, Robert de Rooy wrote: > Jiri Kosina wrote: > > On Thu, 7 Jun 2007, Robert de Rooy wrote: > > > > > > > Yes I figured it was a hardware problem, but that was not really the point > > > I was trying to raise ;). I would like, if possible for Linux to > > > automatically fallback to USB 1.1 like Windows does (preferably with a > > > suitable warning). > > > > > > > What do you propose as a trigger for the kernel to fallback? > > > > You can work it around manually, just don't use ehci-hcd, can't you? > > > > > Yes I can unload ehci-hcd, but I have one USB 2.0 device that strangely enough > DOES work as such, and unloading ehci-hcd will cause that also to run at 1.1 > speed. > > Clearly something is failing when plugging a device with ehci-hcd loaded, the > driver seems to keep retrying indefinitely. Instead it would be nice if after > a few tries it hands the device over to uhci-hcd. This seems to be the > behaviour under Windows, so I was wondering if Linux could be made to do > something similar. > > -- Jiri Kosina - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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