Display flickering since Tails 4.0 (Intel DPST?)
I think Intel’s DPST (Display Power Saving Technology) has become activated on my device since using Tais 4.0. This results in a noticeable dimming and brightening of the display according to what’s on the screen, sometimes quite quickly so that it drags attention from what your doing. I think sometimes it may result in the entire screen going black very briefly (like 0.25 secs), I notice this sometimes. This behaviour was not present in 3.16 or before.
It is distracting and there are plenty of people that have complained about this when using Windows (see here, for example: https://dancharblog.wordpress.com/2019/04/14/disable-intel-dpst-adaptive-contrast-brightness-on-new-uwd-dch-drivers/ ).
Disabling in Windows requires a Registry change but is effective and survives reboots. It would be great to either disable it by default in Tails 4.0 or give users the option.