An unofficial Debian Installer for Pinebook Pro

[talpa]

Hi I have sometime ago installed Debian unstable using danielt's installer, thanks for the installer btw.

The result seems for work quite fine except one issue, a stable picture on a external monitor.

The setup consists of X11 using the internal eDP-1 and DP-1 though a USB-C "dock" -> KVM switch -> 4K monitor.
No issues have been observed on Manjaro so I think it is relatively safe to rule out hardware as an issue

I would describe the issue as part of/the entire external screen jumping one (maybe more) pixel to the right for maybe a frame.
The laptop internal display seems fine.

I have tried:
* Reducing the resolution (the problem persists but is even more annoying as the pixel size is bigger)
* Compiling a custom kernel 5.7.0 based off the Manjaro one
* Comparing "xrandr --verbose" from the Pinebook pro with a stationary connected to the same KVM switch
  (The EDID information is the same as are the clock speeds for the different modes)
* Forcing the CPUs to run in performance mode (to prevent frequency changes that may interfere with the GPU if they share clock domains)
* Updating the system to get the latest mesa (available from Debian)

---------------------------
    GLEW Extension Info
---------------------------

GLEW version 2.1.0
Reporting capabilities of display , visual 0x172
Running on a Mali T860 (Panfrost) from Panfrost
OpenGL version 2.1 Mesa 20.1.2 is supported

I have yet to try to compile mesa-git

My current theory is that the display/pixel timings are very slightly off causing the issue.


Does any one have any similar experiences and/or any suggestions?


Regards and thanks for your time Visti Andresen