[Bug 88746] Re: ehci_hcd module causes I/O errors in USB 2.0 devices

[Tommy Vestermark]

I can confirm the bug in Hardy kernel 2.6.24-19-generic with an AMD 780G board with SB700 southbridge (A Gigabyte GA-MA78GM-S2H). The bug only appears when using USB mass-storage devices. I have used the following script to recover from the error:
# modprobe -r ehci_hcd
# sleep 1
# modprobe ehci_hcd

I have just tried the following as described above:
# echo -1 > /sys/module/usbcore/parameters/autosuspend
And it seems to make the problem disappear :-)

$ lsusb
Bus 007 Device 002: ID 07cc:0501 Carry Computer Eng., Co., Ltd 
Bus 007 Device 001: ID 0000:0000  
Bus 006 Device 006: ID 05ac:0221 Apple Computer, Inc. 
Bus 006 Device 005: ID 05ac:1006 Apple Computer, Inc. Hub in Apple Aluminum Keyboard
Bus 006 Device 004: ID 046d:c046 Logitech, Inc. 
Bus 006 Device 003: ID 03f0:2112 Hewlett-Packard 
Bus 006 Device 002: ID 0424:2504 Standard Microsystems Corp. USB 2.0 Hub
Bus 006 Device 001: ID 0000:0000  
Bus 005 Device 001: ID 0000:0000  
Bus 004 Device 001: ID 0000:0000  
Bus 001 Device 001: ID 0000:0000  
Bus 003 Device 001: ID 0000:0000  
Bus 002 Device 001: ID 0000:0000

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ehci_hcd module causes I/O errors in USB 2.0 devices
https://bugs.launchpad.net/bugs/88746
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