I'm also seeing the regression reported by @richard  (#42).  In
particular, the software for the Syscomp CGR-101 isn't seeing the scope
on a 64 bit Ubuntu Maverick 10.10.  Building the latest version of the
ftdio_sio driver from the 2.6.35-8 linux tree didn't fix the bug, but
porting the version @tz (#7) found to the new kernel fixed the issue.
I've attached the ported version of the older driver for those who need
a fix now.  The install instructions are the same as before:

To install:
1) open a terminal window
2) install the latest kernel headers:

# sudo apt-get install linux-headers-generic

3) download and uncompress the attached file ftdifix.backport.maverick.tar.gz
4) change to the directory where you uncompressed the file, e.g.

# cd ftdifix.backport.maverick

5) build the driver:

# make

6) install the driver

# sudo make install

Until this is fixed, you may have to repeat these steps each time you
install a new version of the kernel.

This isn't a good long-term fix, however - there have been a lot of
changes to the driver, many of which add support for new devices.  The
right fix is probably to do a bisection on the kernel checkins to find
the one that broke this driver for this scenario, and then report the
bug upstream (ideally with a patch).  I'll start the process but I'm not
sure how much time I'll be able to devote to it - if some else wants to
give this a try, feel free.

** Attachment added: "port of ftdi driver from linux kernel 2.6.31.8"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/460857/+attachment/1725253/+files/ftdifix.backport.maverick.tar.gz

-- 
ftdi serial driver broken in linux-image-2.6.31-14-generic (2.6.31-14.48)
https://bugs.launchpad.net/bugs/460857
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