I've just installed PicoScope on my Linux Mint 16 laptop for the first time (this is also my first time using any PicoScope product).
Unfortunately the install scripts appear to have added my user account to the "pico" group but removed me from all the other groups I'd normally be part of. This has caused particular problems as I lost sudo rights which made it harder to fix.
I've had a dig through the Debian scripts and it looks like the postinst script calls "usermod -G" at some point to add the user to the "pico" group. I think that should be "usermod -G -a" so that it appends rather than replaces.
From the man page for usermod: -G, --groups GROUP1[,GROUP2,...[,GROUPN]]]
A list of supplementary groups which the user is also a member of. Each group is separated from the next by a comma, with no intervening whitespace. The groups are subject to the same restrictions as the group given with the -g option.
If the user is currently a member of a group which is not listed, the user will be removed from the group. This behaviour can be changed via the -a option, which appends the user to the current supplementary group list.
Thanks for supporting Linux, this was one of the major reasons I chose this scope