Hi again! Thanks for your help. Now it seems like tuning works, all channels are found where they should be found and I get picture and sound. So now the tuner driver seems to work fine. I'll summarize for the list: My card is a Pinnacle PCTV Pro (red card) with a MT2050 tuner. 1. Patch tuner.c (in the kernel source, drivers/media/video) with Gunther Mayers MT2050 patch that can be found in the list archives for november. I used the 2.4.23 kernel source. 2. Edit drivers/media/video/tuner.c and change the line static unsigned short normal_i2c_range[] = {0x86>>1,0x86>>1,I2C_CLIENT_END}; to static unsigned short normal_i2c_range[] = {0x96>>1,0x96>>1,I2C_CLIENT_END}; 3. Compile the kernel with the bttv-drivers. Install and reboot. 4. Move /lib/modules/2.4.23/kernel/drivers/media/video/tvaudio.o to some other place. 5. Enjoy Thanks for all the help Gunther.