I can add this symptom: I have two CAM's, one is called Matrix Revolutions, another is called X-CAM. These are CAM's which can be used with multiple encryption systems. I tested them with SECA Mediaguard. What happens is that X-CAM works perfectly but Matrix has big troubles. Lots of squares appear in the picture and driver complains about CRC errors. Both CAM's work perfectly in quite old set-top box. irk ----- Original Message ----- From: "Andrew de Quincey" <adq_dvb@xxxxxxxxxxxxx> To: <linux-dvb@xxxxxxxxxxx> Sent: Monday, November 07, 2005 12:26 PM Subject: [linux-dvb] Possible patch for CAM/CI issues > Hi, this is a first attempt at fixing the remaining CI driver issues. > I'm not sure where the problems Macro + Andreas reported are coming from - > they could either be from the application or from the driver, but I > included > you in the CC in case this patch helps... > Main features of this patch: slight restructuring in order to remove > locking > completely - simplifies code and also should increase speed since there is > no > locking necessary now. Also decreases the amount of work done in IRQ > context.