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

As a follow up:
I eventually capitulated and removed the emmc containing Debian and replaced it with the one containing Manjaro.
At first there were no issue, but after some time it started to jump as well (I suppose I just didn't test it for long enough the first time)

I took the laptop to work and tried a Deltaco brand usb-c->hdmi adapter, which seemed to work.

I then ordered a Moreslan 11in1 hub, and it works just fine.

Regards Visti Andresen