diff --git a/smbus.cpp b/smbus.cpp
index 2e524e6..0c75a6b 100644
--- a/smbus.cpp
+++ b/smbus.cpp
@@ -108,7 +108,7 @@ int i2c_smbus_read_byte_data(int file, uint8_t command)
 
 int i2c_smbus_write_byte_data(int file, uint8_t command, uint8_t value)
 {
-	printf("i2c: %02X %02X\n", command, value);
+	//printf("i2c: %02X %02X\n", command, value);
 	union i2c_smbus_data data;
 	data.byte = value;
 	return i2c_smbus_access(file, I2C_SMBUS_WRITE, command, I2C_SMBUS_BYTE_DATA, &data);
diff --git a/video.cpp b/video.cpp
index f107d56..b90d197 100644
--- a/video.cpp
+++ b/video.cpp
@@ -1060,7 +1060,7 @@ static void hdmi_config()
 		for (uint i = 0; i < sizeof(init_data); i += 2)
 		{
 			int res = i2c_smbus_write_byte_data(fd, init_data[i], init_data[i + 1]);
-			if (res < 0) printf("i2c: write error %d\n", res);
+			if (res < 0) printf("i2c: write error (%02X %02X): %d\n", init_data[i], init_data[i + 1], res);
 		}
 		i2c_close(fd);
 	}