>> Those accesses might not stop with just the display off - some >> applications may keep redrawing. Will these accesses cause iGPU or dedicated GPU accesses to the DRAM? I think that those redrawings originate from the processor.
>I'm not sure a graphical benchmark will run without a graphical system >running? Yes, VLC is one of the benchmarks and will not run without GUI. >Maybe do the reverse of what I suggested. Run the benchmark but send>the >output to a remote display. Will it avoid screen activation in the local machine? >Since IMC counters appear to be a feature of the powerpc architecture, >you might get a better response from some list/forum specific to that >architecture. IMC stands for the Integrated Memory Controller. The DRAM controller has some internal counters for counting different types of memory accesses. For example, for my laptop it is documented here:https://software.intel.com/content/www/us/en/develop/articles/monitoring-integrated-memory-controller-requests-in-the-2nd-3rd-and-4th-generation-intel.html Do you have any suggestions about the cause of the xrandr error? It works perfectly in the virtual machine!