Comments (8)
rockowitz
commented on August 24, 2024
Please submit the output of ddcutil interrogate as an attachment.
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SamuelBorn
commented on August 24, 2024
> ddcutil interrogate
interrogate.txt
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rockowitz
commented on August 24, 2024
When you say everything else fails, are you including getvcp etc? The detect command internally performs getvcp operations to test DDC communication and read the VCP version. The interrogate output also shows successful operations.
capabilities is the most complicated operation. It performs several getvcp operations, each based on what is returned in the prior operation. So if you have a marginal video card/monitor, it's the most likely to fail.
Option --ddcdata (previously named --ddc) reports DDC data errors. I suspect you'll see lot of them for commands that fail.
It appears that you are using a high sleep multiplier for the monitor (2.0) so there's nothing more to be done there.
Your video card is rather old. It likely needs the special Nvidia settings .
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SamuelBorn
commented on August 24, 2024
When you say everything else fails, are you including getvcp etc? The detect command internally performs getvcp operations to test DDC communication and read the VCP version. The interrogate output also shows successful operations.
Sorry, you are right. getvcp works. I only tested setvcp.
~ ❯ ddcutil -d 2 getvcp 10
VCP code 0x10 (Brightness ): current value = 70, max value = 100
Option --ddcdata (previously named --ddc) reports DDC data errors. I suspect you'll see lot of them for commands that fail.
Yes, I do:
~ ❯ ddcutil -d 2 setvcp 10 50 --ddcdata
DDC: Unexpected source address 0x82, should be 0x6e
DDC: i2c_response_bytes: 82 01 10 ac df 00 ff ff 02 02 6b 32 29 29 29 73 65 74 5f 65 65 70 28 6e 88 02 00 10 00 00 64 00 64 a4 32 29 29 29 73 65
DDC: Unexpected source address 0x82, should be 0x6e
DDC: i2c_response_bytes: 82 01 dd 61 10 00 00 64 00 64 a4 32 6e 88 02 01 dd 00 00 64 00 64 68 32 29 29 29 73 65 74 5f 65 65 70 28 34 30 29 6d 63
DDC: Unexpected source address 0x82, should be 0x6e
DDC: i2c_response_bytes: 82 01 df 63 dd 00 00 64 00 64 68 32 29 29 29 73 65 74 5f 65 65 70 28 34 30 88 02 00 df 00 ff ff 02 02 6b 32 29 29 29 73
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
Verification failed for feature 10
It appears that you are using a high sleep multiplier for the monitor (2.0) so there's nothing more to be done there.
I did not (consciously) set it this high. Is it because of my old monitor?
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rockowitz
commented on August 24, 2024
I may have misinterpreted your cached sleep multiplier data. Try explicitly setting a high sleep multiplier using option sleep-multiplier 2.0
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SamuelBorn
commented on August 24, 2024
This did not seem to help.
$ ddcutil --sleep-multiplier 2.0 -d 2 setvcp 10 50 --ddcdata
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
DDC: Unexpected source address 0xff, should be 0x6e
DDC: i2c_response_bytes: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff fffrom ddcutil.
rockowitz
commented on August 24, 2024
I'm afraid there's nothing more I can suggest.
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SamuelBorn
commented on August 24, 2024
Okay, thank you for your time and attention anyway.
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