@OttawaHacker Do you mean 60% of 100 or the 60% from "top". Just checked and still about 15-20% with 2 cpus isolated (some testing with LinuxCNC). Then I resized the window, switched to another window and back and the cpu load stayed at 60% for a while, then had to reload and cpu load was as low as normal again. Perhaps an accelerator crashed at that moment?
You could compare your report with mine, I had installed the Vulkan driver which Chromium seems to use, not sure if that's getting installed automatically witch the ppa?
gpu-report-chromium.txt