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Date: Sun, 31 Jul 2005 10:42:14 -0700
From: Andrew Morton <akpm@osdl.org>
To: Michael Thonke <iogl64nx@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-usb-devel@lists.sourceforge.net
Subject: Re: 2.6.13-rc4-mm1
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(cc linux-usb-devel)

Michael Thonke <iogl64nx@gmail.com> wrote:
>
> Hello Andrew,
> 
> the ACPI bug or the problems with 2.6.13-rc3-mm[2,3] gone.
> The system boots now noiseless, except on problem with USB.
> 
> If my Prolific USB-Serialadapter  plugged in on reboot
> the ehci_hcd driver complains about a Hand-off bug in Bios.
> 
> -> snip
> 
> ehci_hcd 0000:00:1d.7: EHCI Host Controller
> 
> ehci_hcd 0000:00:1d.7: debug port 1
> 
> ehci_hcd 0000:00:1d.7: BIOS handoff failed (104, 01010001)
> 
> ehci_hcd 0000:00:1d.7: continuing after BIOS bug...
> 
> ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 1
> 
> ehci_hcd 0000:00:1d.7: irq 161, io mem 0xd2dffc00
> 
> -> snip
> 
> 
> I wonder about this because all other USB devices working without this 
> message on boot.
> 
> USB Mouse,Keyboard and USB Storage and all mixed from USB 1.1 and 2.
> 
> When I rebooted without plugged Prolific Adapter and plug them in the 
> same port
> the kernel prints this message.
> 
> ->snip
> 
> usb 4-1: new full speed USB device using uhci_hcd and address 2
> 
> pl2303 4-1:1.0: PL-2303 converter detected
> 
> usb 4-1: PL-2303 converter now attached to ttyUSB0
> 
> -> snip
> 
> 
> Any Ideas what could be wrong here?

Nope.  Can you identify the most recent kernel which didn't have these
problems?