Comment 1 for bug 460857

Plus one. I have a radio modem (TNC-X) that uses an FTDI USB/serial chip for communications to a PC host. The device connects fine, kicks off udev, and the module loads ok, but some applications (including the intended app, Xastir) cannot read from the device under the current Karmic kernel (2.6.31-14-generic). No errors, no warnings - the data just never makes it into the application.

I see that there is a kernel package 2.6.31-15-generic in "Karmic proposed". Please note that the 15 package =does not= contain the fixes described in the previous post, as it is based on the 2.6.31.4 source, and exhibits the same problems as from the production kernel. I was able to start with "15-generic" and compile a one-off of the ftdi_sio module using the 2.6.31.5 kernel source. This seems to work fine.

So as mentioned above, please either patch the proposed kernel with the 2.6.31.5 code for ftdi_sio, or maybe start over with a new kernel based on 2.6.31.5.

Thanks.