Intel's Linux Graphics Driver Improving DRRS Support For Better Power-Savings

[phoronix]

Phoronix: Intel's Linux Graphics Driver Improving DRRS Support For Better Power-Savings

A set of 13 patches were posted overnight for improving the Intel Linux kernel graphics driver's handling of the power-savings feature Display Refresh Rate Switching (DRRS) for laptops...

https://www.phoronix.com/scan.php?page=news_item&px=Intel-Linux-Improve-DRRS

[nkalkhof]

Michael, could you run some tests on UHD mobile graphics?

[xAlt7x]

Yes, please.
Since kernel v4.1 there's annoying issue on HP Folio 1040 G1 - screen flickers at the top right corner. And there's no good options to workaround it. You need to apply kernel patch to disable DRRS. (https://bugs.launchpad.net/ubuntu/+s...x/+bug/1928138 ; https://gitlab.freedesktop.org/drm/intel/-/issues/3441) or boot with "nomodeset" parameter.

[yump]

How common are laptops with displays that can do this? Is it plumbed all the way up through the stack for compositors to make use of it?