This issue happens with the stock 4.15 kernel. I have upgraded the kernel to 4.18 and 4.19 and was getting the same issue. I managed to get rid off the error now. It seems it does not like intel_pstate. I added intel_pstate=disable to grub and the error has gone away.
This issue happens with the stock 4.15 kernel. I have upgraded the kernel to 4.18 and 4.19 and was getting the same issue. I managed to get rid off the error now. It seems it does not like intel_pstate. I added intel_pstate= disable to grub and the error has gone away.