I've concluded that this monitor simply doesn't support a write to that Power Mode address over the DDC/CI connection. It seems the only way to change that address is by a direct press of the power button.
A bit disappointing for my setup, but not the end of the world.
I'm not familiar with the 1908FP, but some of these older monitors can't process DDC/CI commands in sleep mode. To confirm, try reading the capabilities string when the monitor is in sleep mode (0xD6=4) to see if you get a valid response, or even something simpler like just reading the brightness control (0x10).
If the monitor can't process commands when 0xD6=4, try setting it to 3 or 2 instead of 4, and - long shot - try waking it up with 0xD6=0 instead of 1.
DELL-Chris M
Community Manager
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56.9K Posts
0
January 15th, 2018 06:00
According to 1908FP User's Guide page 23, DDC/CI can be enabled in the OSD (On Screen Display) for this 10 year old monitor =
Whether it can then be used by that non-tested software is unknown by Dell.
jetompki
2 Posts
0
January 15th, 2018 16:00
Thanks for the reply.
I've concluded that this monitor simply doesn't support a write to that Power Mode address over the DDC/CI connection. It seems the only way to change that address is by a direct press of the power button.
A bit disappointing for my setup, but not the end of the world.
swamped207
3 Apprentice
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426 Posts
0
January 16th, 2018 01:00
I'm not familiar with the 1908FP, but some of these older monitors can't process DDC/CI commands in sleep mode. To confirm, try reading the capabilities string when the monitor is in sleep mode (0xD6=4) to see if you get a valid response, or even something simpler like just reading the brightness control (0x10).
If the monitor can't process commands when 0xD6=4, try setting it to 3 or 2 instead of 4, and - long shot - try waking it up with 0xD6=0 instead of 1.