Hello Akiva I write that problem not inside function that you write problem is inside dvb_ca_en50221_write_data it setup HC and clear SW, so for module it looks like standart write data to it not i buffer size so delay is not helps 100% a also try it :) before searching inside. and still waitng for information from some one what means by standart 6 and 7 bit in conrtol register of CAM module. in my standart it reserved and must be 0. About: Is there any card which driver already uses the dvb_ca part of the dvb-core ? yes it cart witch i use TT Budget-S1500 need for you driver part for this card is in ttpci directory in budget-ci.c file. about using in you project is it open source? if no, as i know, by license you can`t use source code of dvb-core infrastructure, may be i wrong i don`t know. about 1030 it not good card for you case work with CAM module fully packed inside of small CPU on board of card so it gives only controll to high level comand of CAS session and it stop to work to much with CAM modules witch try to use MMI session. I also have some projects on it. -- Bendyak Evgen _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb