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Date: Thu, 7 Jun 2007 13:50:15 -0700 From: Joel Becker <Joel.Becker@...cle.com> To: Robert de Rooy <robert.de.rooy@...il.com> Cc: linux-kernel@...r.kernel.org, greg@...ah.com Subject: Re: ThinkPad T41 - Strange USB 2.0 behaviour On Thu, Jun 07, 2007 at 10:23:19PM +0200, Robert de Rooy wrote: > On my ThinkPad T41 USB 2.0 behaves strange. Most USB 2.0 devices, refuse > to function as such. Under Windows I get a message that I should plug > the device into a USB 2.0 port (but it continues to function as USB > 1.1), while under Linux I need to manually unload ehci-hcd before I can > access the device. > > The strange thing is that these USB 2.0 devices used to work just fine, > and still do on other machines. In addition I have one USB 2.0 memory > key that still works fine (both under Windows and Linux). > > Now to be honest, I think this is a hardware problem, as I have had > another T41p before that also suddenly no longer liked USB 2.0 devices, > and if you search with Google you find other ThinkPad T41 users > complaining about similar behaviour. Hardware problem. You need a new system board. I had this problem on my T41, devices would sometimes work, sometimes not (depending on the reboot). If I plugged in a USB 1.1 hub, then pluged the memory reader into the hub, it would always work at 1.1 speeds. New system board, USB 2.0 works just fine. Joel -- Life's Little Instruction Book #274 "Leave everything a little better than you found it." Joel Becker Principal Software Developer Oracle E-mail: joel.becker@...cle.com Phone: (650) 506-8127 - 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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