On Fri, 2019-03-01 at 13:43 +0100, Rafael J. Wysocki wrote: > Hi All, > > This is how I would fix the issue reported in BZ 200759 (see this > patch series > from Yu too: https://marc.info/?l=linux-pm&m=155137672924029&w=2). > > Patch [1/2] causes intel_pstate to update all policies if it gets a > _PPC change > notification and sees a global turbo disable/enable change. > > Patch [2/2] makes it update cpuinfo.max_freq for all policies in > those cases. > > The patches here have not been tested yet, so testing would be much > appreciated. > > Of course, comments are welcome too!
This is the only platform, someone reported such issue. Can we solve this by some udev rules and offline/online cpu 1-3 on power source change? There are examples of changing governors on power source change. https://bbs.archlinux.org/viewtopic.php?id=207186 Here instead of changing governor just echo 0 > /sys/devices/system/cpu/cpu1/online echo 1 > /sys/devices/system/cpu/cpu1/online echo 0 > /sys/devices/system/cpu/cpu2/online echo 1 > /sys/devices/system/cpu/cpu2/online echo 0 > /sys/devices/system/cpu/cpu3/online echo 1 > /sys/devices/system/cpu/cpu3/online Thanks, Srinivas > > Thanks, > Rafael >
