while I really like the Librem13v3, I encounter some technical problems, This includes the known screen flickering issue (haven’t managed to fix that yet)
At least for this one I can say that if this addresses the LCD LED backlight flickering when running on (low) battery, then we will hopefully soonish have a software fix for that. It seems that not only some Librem laptops suffer from this but quite a larger number of laptops of different brands but which share Intel chipsets. The problem seems to be in the backlight PWM frequency having some (cause unknown) side effect on other parts that in the end causes the backlight to modulate or flicker. Increasing the backlight PWM frequency from the default about 200Hz to something higher seems to fix it (successfully tried on a hand full of laptops that failed).
You can try yourself by installing the Intel GPU utilities:
sudo apt-get install intel-gpu-tools
and after that issue something like
sudo intel_reg write 0xC8254 0x03ff03ff
The problem is though that this new setting will get reset every time when the display gets blanked / switched off (e.g. by a screensaver). We are now investigating how to best make this setting permanent.
Cheers
nicole