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From: David Brownell <david-b@pacbell.net>
To: florian_kr@gmx.de
Subject: Re: [<02282da7>] (usb_hcd_irq+0x0/0x4b) Disabling IRQ #5 - USB Devices
Date: Mon, 6 Dec 2004 20:27:33 -0800
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Hi,

> My Questions:
> 
> How can I enable "USB Legacy Support" without errors?

As a rule, Linux will be happier without it.
Why do you want to enable it?


> How can I resolve the problem with the USB devices?

Have you tried adding "usb-handoff" to your
kernel command line?  That was added specifically
to help work around BIOS bugs like those you've
run into ...


> I've found via google some BIOS Bugs for "USB Legacy Support", but this
> bug occurs only on Windows XP (I don't found this for Linux). I tried
> allready to update my BIOS and now USB is disabled for all devices
> (Mouse, Printer, Scanner, USB-FlashMemory)

As a rule, if BIOS bugs affect XP I'd not be surprised
if to find them affecting Linux too.


> irq 12: nobody cared! (screaming interrupt?)
> irq 12: Please try booting with acpi=off and report a bug
> Stack pointer is garbage, not printing trace
> handlers:
> [<0223aede>] (i8042_interrupt+0x0/0x251)
> Disabling IRQ #12

That was interesting ... not directly related to USB,
looks like maybe the "legacy" support didn't work
very well either; maybe that's what the BIOS update
was solving.

- Dave