Если загрузиться с линуксовым ядром версии 3.2, то ddccontrol -p выдаёт:
Detected monitors :
- Device: pci:00:02.0-0
DDC/CI supported: Yes
Monitor Name: Samsung standard LCD
Input type: Analog
(Automatically selected)
- Device: dev:/dev/i2c-4
DDC/CI supported: Yes
Monitor Name: Samsung standard LCD
Input type: Analog
- Device: dev:/dev/i2c-3
DDC/CI supported: Yes
Monitor Name: Samsung standard LCD
Input type: Analog
А с новыми ядрами 3.5 или 3.8:
Detected monitors :
- Device: pci:00:02.0-0
DDC/CI supported: Yes
Monitor Name: Samsung standard LCD
Input type: Analog
(Automatically selected)
- Device: dev:/dev/i2c-1
DDC/CI supported: No
Monitor Name: VESA standard monitor
Input type: Analog
При этом:
>$ lsmod | grep i2c
i2c_dev 13154 0
i2c_algo_bit 13197 1 i915
>$ ls -l /dev/i2c*
crw-rw---- 1 root i2c 89, 0 Feb 26 18:18 /dev/i2c-0
crw-rw---- 1 root i2c 89, 1 Feb 26 18:18 /dev/i2c-1
crw-rw---- 1 root i2c 89, 2 Feb 26 18:18 /dev/i2c-2
crw-rw---- 1 root i2c 89, 3 Feb 26 18:18 /dev/i2c-3
crw-rw---- 1 root i2c 89, 4 Feb 26 18:18 /dev/i2c-4
crw-rw---- 1 root i2c 89, 5 Feb 26 18:18 /dev/i2c-5