t5125 thin client: USB->Serial Adaptor (PL2303) fails

[Henty Waker]

I've got an HP t5125 thin client running the latest firmware image (L1ST3158 a).

Most USB devices seem to work fine (keyboard, mouse, flash ram stick).

However a PL2303 usb->serial converter does not work reliably. It is detected when inserted and very basic serial devices seem to work but things like modems or magcard readers do not - e.g. there is absolutely no response to an AT command)

The exact same converter and modems work fine on a PC running 2.6 kernel. I don't have a PC running a newish 2.4 kernel.

Does anyone know how to fix this?

Thanks
Henty Waker

[KarlMW]

Maybe the PL2303x problem:
http://koti.mbnet.fi/lonnberg/pl2303x.html
The PL2303 and PL2303x have the same USB ID but are not completely compatible - early drivers failed to recognise the difference and thereby fail to work.