Comment 643 for bug 1690085

Hi guys. I have an Asus ROG Strix notebook with Ryzen 7 1700. My CPU was manufactured on week 46 of 2017 (UA 1746PGS), so it does not have the segfault problem. My notebook completely freeze when it is idle, not always, but it is more common when newly powered (cool) or after heavy activities. The freezes never occurred during more intense use, only when idle. Like all notebook BIOS, my BIOS options is quite limited and does not have a "Typical current idle" or similar option. I tried to recompile the kernel with the option "RCU_NOCB_CPU" and also tried all possible combinations with the parameters "rcu_nocbs", "iommu=soft/pt", "idle=nomwait/halt", "pti=off" / "nopti", etc, etc, etc. The only alternative that actually solved the freeze problem was to use the program "zenstates.py" disabling the "c6state" core and package. But this attitude makes my CPU run about 5°C warmer. I used Windows on this same machine for weeks without any crashes. This makes me conclude the following: does not crash on windows (ok, it's a software problem, "linux"); CPU intel does not hang in linux (oh no, ok, it's a hardware problem, "Ryzen"). I do not know what AMD thinks about this, but I was forced to change my notebook. Now I got one with an Intel processor. Thank you AMD.