On 2/20/25 07:36, Lucas De Marchi wrote: > On some boots the read of MSR_PP1_ENERGY_STATUS msr returns 0, causing > perf_msr_probe() to make the power/events/energy-gpu event non-visible. > When that happens, the msr always read 0 until the graphics module (i915 > for Meteor Lake, xe for Lunar Lake) is loaded. Then it starts returning > something different and re-loading the rapl module "fixes" it.
What's the root cause here? Did the kernel do something funky? Or is this a hardware bug?
