After reading a bit about the screen flickering issue caused by low PWM modulation frequencies I get the feeling that this is a completely different issue… @mladen Have you watched the videos I posted?
Btw, please delete or edit the obsolete Troubleshooting entry for Screen Flickering. enable_rc6 is no valid parameter for i915 anymore.
You can list all available module parameters with sudo modinfo i915. Parameter enable_rc6 is not listed there and if you add i915.enable_rc6=0 as kernel boot parameter all you get is this kernel message at boot time:
i915: unknown parameter ‘enable_rc6’ ignored
And then one more thing. To everyone who is trying out different module options (like me) to get rid of screen flickering: At least on a Librem13 v3 it makes no difference if you add the kernel parameter i915.enable_psr=0 because it is set to 0 by default (see this posting for an easy way to find out). modinfo i915 tells me that there’s a “per-chip default” in use, so for our chip the default seems to be 0.