Question on 2.4.21 unusual_devs list.

DISCUSSION Doug Maxey 2 participants 2 messages Sep 9, 2003

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Doug Maxey

author

2003-09-09 19:17 UTC #0 lore raw

Greetings,

I have an interesting situation with 2 different TEAC FD-05PUB-x59 floppy drives. The x59 designation is on the external device label, the two samples in my lab are -159 and -259.

Both show the same descriptors, and both indicate they are C/B/I devices according to lsusb.

However, depending on the value defined in the unusual_dev list, currently US_PR_CB, I can only get the older -159 drive to configure.

If the unusual_devs list is edited to show the supported protocol as US_PR_CBI, and get the other device -259 configured, and not the other.

This leads to my questions:

1) What is the the signifigance of the unusual_devs list. I am infering the list exists to provide a way to configure devices that do no precisely aggree with the protocol actually supported

2) if a given device is in the unusual_devs list, how does one also define that it might show as the other, that is to say, correctly?

++doug

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Greg KH

2003-09-09 22:37 UTC #1 lore raw

Quoted 17 lines · Doug Maxey

Greetings,
I have an interesting situation with 2 different TEAC FD-05PUB-x59 floppy drives. The x59 designation is on the external device label, the two samples in my lab are -159 and -259.
Both show the same descriptors, and both indicate they are C/B/I devices according to lsusb.
However, depending on the value defined in the unusual_dev list, currently US_PR_CB, I can only get the older -159 drive to configure.
If the unusual_devs list is edited to show the supported protocol as US_PR_CBI, and get the other device -259 configured, and not the other.

Quoted 8 lines

This leads to my questions:
1) What is the the signifigance of the unusual_devs list. I am infering the list exists to provide a way to configure devices that do no precisely aggree with the protocol actually supported
2) if a given device is in the unusual_devs list, how does one also define that it might show as the other, that is to say, correctly?

Please send the output of /proc/bus/usb/devices for these two devices, and all of this email again, to the linux-usb-devel mailing list. The hotplug list really isn't about USB specific stuff.

thanks,

greg k-h