Thought I'd try a new thread with this problem as I'm getting no where - and not sure what else to try. I've just added a Irdeto CAM to my TT-1500 Budget DVB-C card and I'm getting write errors with VDR and with gnutv: [root@media1 gnutv]# dmesg | grep DVB DVB: registering new adapter (TT-Budget-C-CI PCI). DVB: registering frontend 0 (ST STV0297 DVB-C)... dvb_ca adapter 0: DVB CAM detected and initialised successfully dvb_ca adapter 0: DVB CAM detected and initialised successfully [root@media1 gnutv]# ./gnutv -cammenu en50221_tl_poll: CAWrite failed en50221_stdcam_llci_poll: Error reported by stack:-2 and In /var/log/messages: Apr 30 19:31:26 media1 vdr: [2774] CAM 1: module present Apr 30 19:31:28 media1 kernel: dvb_ca adapter 0: DVB CAM detected and initialised successfully Apr 30 19:31:28 media1 vdr: [2774] CAM 1: module ready Apr 30 19:31:29 media1 vdr: [2774] ERROR: can't write to CI adapter on device 0: Input/output error In dmesg: dvb_ca adapter 0: DVB CAM detected and initialised successfully dvb_ca adapter 0: DVB CAM detected and initialised successfully dvb_ca adapter 0: DVB CAM detected and initialised successfully I'm running the latest hg v4l-dvb. Can anyone suggest anything? Does this look like faulty hardware??? It does it in 2 different machines. Thanks Simon