[ddccontrol-users] Unsupported display info: Gigabyte FI27Q and BenQ GW2255

[Keith H <Ke...@pr...>]

I have the following displays:

- 2x BenQ G2255
- 1x Gigabyte Aorus FI27Q

ddccontrol says that none of them are supported, and directed me to send an email to this address with info. I ran the following:

root@HAFXB-deb:/home/keith# LANG= LC_ALL= ddccontrol -c -d dev:/dev/i2c-5 >> FI27Q.txt 2>&1
root@HAFXB-deb:/home/keith# LANG= LC_ALL= ddccontrol -c -d dev:/dev/i2c-2 >> GW2255_21E04907SL0.txt 2>&1root@HAFXB-deb:/home/keith# LANG= LC_ALL= ddccontrol -c -d dev:/dev/i2c-3 >> GW2255_K8E07852SL0.txt 2>&1

The corresponding outputs are attached. I've also attached pictures of the rear stickers. In fiddling with ddccontrol and ddcutil, I've noticed that:

- None of the serial numbers reported by "ddcutil detect" match the stickers. The BenQ ones are close, but the Gigabyte one is not and may not be globally unique.
- Differences in DDC handling for inactive inputs:

- The BenQ monitors do not respond to DDC commands from the DVI port when they are switched to the VGA input.
- The Gigabyte monitor responds to DDC commands from the DP port regardless of the active input setting.
- Input identification and switching (with command 0x60)

- The BenQ monitor is identified correctly (0x01 is VGA, 0x03 is DVI, no other inputs)
- The Gigabyte monitor is not identified correctly. The correct values are: 0x11, 0x12, and 0x0F for HDMI-1, HDMI-2, and DP, respectively.

Please let me know if you need anything from me in order to add these to the supported monitor database.

Thank you