USB anomaly

[ayro]

Hi,

I have an Nforce2 chipset (6USB ports). AMD Athlon XP 2800+.....Kubuntu 7.04 (all updates installed)

Problem.
Have both USB thumbdrive (1Gb) and an EPSON scanner. I can't have both plugged in a the same time or the Thumbdrive is not recognized (the order in which I plug them in doesn't matter, happens _all_ the time). Opened up the hardware viewer and my thumbdrive isn't listed.

As soon as I unplug scanner, the thumbdrive is immediately recognized again and mounted. Plug the scanner in and thumbdrive disappears (until I unplug the scanner).

What could possibly be going wrong? (if anyone needs more info, please ask. I'm not sure what info is needed, or how to get it).

Help would be greatly appreciated.

Thanks
ayro

[SheeEttin]

Re: USB anomaly

Plug in one, execute "lsusb". Plug in the other, "lsusb". Plug in both, "lsusb".
Attach these (or put them in code tags) here.

[ayro]

Re: USB anomaly

here 'tis

[code=thumbdrive only]Bus 003 Device 021: ID 0781:5406 SanDisk Corp. (this is the USB thumbdrive)
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 045e:0039 Microsoft Corp. IntelliMouse Optical
Bus 001 Device 001: ID 0000:0000[/code]

[code=scanner only]Bus 003 Device 033: ID 04b8:0116 Seiko Epson Corp. (this is the scanner)
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 045e:0039 Microsoft Corp. IntelliMouse Optical
Bus 001 Device 001: ID 0000:0000[/code]

[code=both scanner and thumbdrive]Bus 003 Device 022: ID 04b8:0116 Seiko Epson Corp.
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 045e:0039 Microsoft Corp. IntelliMouse Optical
Bus 001 Device 001: ID 0000:0000[/code]

[SheeEttin]

Re: USB anomaly

That is interesting.
I assume you have multiple sets of USB ports--what happens if you pug them into separate ones?

[ayro]

Re: USB anomaly

I tried the thumb drive in all the other USB ports on my computer. Still no luck. The moment I plug in the scanner, lsusb gives the same output as above....and the thumb drive stops responding.

[ayro]

Re: USB anomaly

*bump*