rockowitz

A further thought. Are you able to connect the DP input on your monitor directly to the laptop? That would indicate whether all the special driver handling for docking stations...

The ***--f2*** output is disappointing. What I see is that connector card1-DP-5, as well as card1-DP-7 has a valid EDID. Unfortunately, sysfs doesn't provide the I2C bus numbers for these...

Likely your HDMI->VGA adapter isn't passing the I2C signals. See the discussion on issue #149.

The display detection code has seen a lot of rework lately. Please be sure your copy of branch 2.1.5-dev is current with that on github. One thing that **interrogate** does...

Conceivably this [bug](https://gitlab.freedesktop.org/drm/amd/-/issues/3672) that I reported to the amdgpu list could be related to the lockup you've seen. If the system locks up can you ssh into it? If so,...

There's a lot to unpack here. First, let me apologize for an errant asterisk. I meant to type "--trcfile i2c_execute", not "i2c_execute*" in the command options. The extra asterisk came...

My oops. The proper option is ***--disable-cross-instance-locks***.

I have replaced, in branch 2.1.5-dev, the function that finds the display adapter for an i2c device. Does **ddcutil detect --verbose** find the display? If not, run **ddcutil detect --verbose...

Please build from branch 2.2.0-dev, run the following, and submit the output as an attachment ddcutil setvcp 10 20 --trcfunc ddc_write_read_with_retry --trcfunc ddc_write_only_with_retry ddcutil setvcp 10 20 --trcfunc ddc_write_read_with_retry --trcfunc...

The sleep-multipliers being used are very low. Try explicitly setting option ***--sleep-multiplier 2.0***.