I put following code to tda9840_setmode: printk("stereo\n"); buffer[0]=TDA9840_SW; buffer[1]=0x2a; (chip->c).addr= 0x84 >>1; i2c_master_send(&chip->c, buffer, 2); I found "stereo" in dmesg, but sound is still mono... there are also "read" functions - is it possible to read this value, and check if it's set to 0x2a? -- I love the night So many shadows Unholy light Secrets of the heart Leave 'em in the dark "Lord of the Last Day" Forever - Ronnie James Dio