Hi Peter
I have not updated to DSM4.2 already but on my DS411slim under DSM4.1 I had to install the newest firmware for my HVR930C
I got some hints from: http://www.mail-archive.com/linux-media@vger.kernel.org/msg40483.html and did the following:
1) download
http://www.wintvcd.co.uk/drivers/HVR-9x0_5_10_325_28153_SIGNED.zip
2) unzip it
3) copy folder "HVR-900" to diskstation (e.g. /volume1/homes/admin/
4) telnet to DS as root
5) change ownership with
chown -R admin /volume1/homes/admin/HVR-900
6) extact it with
dd if=HVR-900/emOEM.sys of=dvb-usb-hauppauge-hvr930c-drxk.fw bs=1 skip=71600 count=42692
7) copy the firmware to the hotplug dir
cp dvb-usb-hauppauge-hvr930c-drxk.fw /usr/syno/hotplug/firmware
(here you have to check if the hotplug dir for DSM4.2 ist there)
8) plugin the stick
Please note: This worked for me under DSM4.1
And I guess you have to find the right firmware for your specific Hauppauge.
It's probably within the same file under 1) but I do not know how to extract.
Probably here? http://www.hauppauge.de/site/support/support_linux.html
So far, Albert