Originally posted by Zan Lynx
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Intel PSR adjustment is not pure VRR. What you will see is PSR being a set of fixed speeds like 30, 60, 120. Yes picking 40Hz as your wayland compositor slow mode could be really bad idea as in some cases that that can be basically locking you at 80/120 now not all LCD screens do 80.
Yes it possible on Intel to have a VRR of zero and a PSR of 240Hz at the same time because the LCD panel only mode is 240Hz. Fixed PSR rates still exist even in a VRR supporting monitor. Fixed PSR on LCD screens is simple to calibrate brightness configurations compared truly dynamically changing PSR. The complexity configuring dynamically changing PSR brightness resulting in either too dark or too bright at different times that in fact generate flicker. Yes when PSR goes up to 120Hz then you are rendering by VRR at 30 frames of second following a that the PSR can remain up at 120Hz for a while before deciding to switch back with Intel just in case another 120Hz VRR will be coming soon so reducing brightness adjustments and reducing flicker risk that in worse case you have human laying on ground having epilepsy attack.
PSR and VRR are these days running out of alignment with each other. Yes the flicker of early VRR monitors is in fact dangerous the correction of it results in PSR not running in alignment with the VRR. Yes the cheaper monitors still doing the older method will have to disappear in time they are not safe monitors.
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