Comment 5 for bug 778676

Actually H (capital) is more correct than i. H is an unsigned short.

Check out /usr/include/X11/Xauth.h

typedef struct xauth {
    unsigned short family;
    unsigned short address_length;
    char *address;
    unsigned short number_length;
    char *number;
    unsigned short name_length;
    char *name;
    unsigned short data_length;
    char *data;
} Xauth;

It should be an unsigned short (H) instead of just a short (h). Int (i) happens to work as well but unsigned short is more correct.

For those who just want sabayon to work do
sudo nano +276 /usr/lib/pymodules/python2.7/sabayon/protosession.py
and make the h's into H's so it looks like
pack_format = ">HH%dsH%dsH%dsH%d" % (display_addr_len, display_num_len, xauth_name_len, xauth_data_len)