dockd deamon fails: xrandr BadMatch

[maltere]

Running dockd on my T480s with the branch github-issue-9 as mentioned in #9, fixed the config issue.

Now running dockd --deamon is resulting in an new (xrandr) error.

X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 7 (RRSetScreenSize)
Serial number of failed request: 22
Current serial number in output stream: 24

My setup is working in both configurations when setup manually, which is supposed to be:

• undocked: 1 internal QHD display
• docked: 2 external QHD displays, no internal display

But my observation is that for switching the setup, I first need to deactivate the internal display before activating the external resolution.
I guess it is because, the Intel graphics HD 630 does not support 2xQHD (2 x 2560 × 1440) external + 1 QHD(2560 × 1440) internal displays, and while switching it shortly is supposed to be activated.

Is there a known workaround or fix?