[pvrusb2] debugcmd permission denied

[Svein Lindal]

Hi,

I just got a wintv pvr usb2 from Amazon.com the model nr:

24022 LF rev E1A3 NTSC/NTSC-J

is not on the list of previously registered devices, and running the
fwextract.pl script did not yield any result. So I am trying to the
firmware extraction procedures that are described here:
http://www.isely.net/pvrusb2/firmware.html#FX2

the usb sniffer procedure seems to have worked, so now I am trying to
capture the FX2 firmware. However, when I am running the debugcmd I
get the following error:

$ sudo echo "cpufw done" >/sys/class/pvrusb2/sn-8674305/debugcmd
bash: /sys/class/pvrusb2/sn-8674305/debugcmd: Permission denied

I am no expert, so I'm not sure what I am doing wrong. I think I am
running the standalone version of the driver. At least I have
downloaded the software and done a make. How can I be sure which
version is currently running?

I am running Ubuntu Feisty, i saw a previous post where people had
managed to make it work out of the box. At the moment I actually get a
tv-picture, but the image is pretty screwed up.

Thanks in advance for any help,

Svein