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SubjectRe: 2.6.27: ehci bug with AMD 770nb/SB700 southbridge. usb lockup
Date
Hi,
when I load ohci-hcd first and ehci-hcd second and make sure that the usb-port
for the mouse does not share its interrupt with the graphic card, everything
works (almost) fine. With big transfers from or to a harddisk in an enclosure
the mouse is sometimes a bit jerky.

Bus 007 Device 001: ID 1d6b:0002
Bus 006 Device 004: ID 05e3:0702 Genesys Logic, Inc. USB 2.0 IDE Adapter
Bus 006 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 006 Device 001: ID 1d6b:0002
Bus 005 Device 001: ID 1d6b:0001
Bus 004 Device 001: ID 1d6b:0001
Bus 003 Device 001: ID 1d6b:0001
Bus 002 Device 001: ID 1d6b:0001
Bus 001 Device 005: ID 046d:c518 Logitech, Inc. MX610 Laser Cordless Mouse
Bus 001 Device 001: ID 1d6b:0001

bus 1 is ohci.
bus 6 is ehci.

But if the mouse is connected to a ehci port or the ehci hub, as soon as data
transfers from or to an usb connected storage device starts, it will lock up.


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