Re: [REGRESSION] bitland-mifs-wmi: power-saver write is accepted but profile remains balanced on Redmi Book Pro 14 2022

On 2026-07-21, Thorsten Leemhuis wrote:
> Side note: Robert, have you tried if latest 7.2-rc works any better?

No. I have now reproduced the same failure on:

     Kernel: 7.2.0-rc5-1-cachyos-rc
     bitland_mifs_wmi srcversion: 9A432DB17D1453AA4DD476C
     power-profiles-daemon: 0.30-3
     kernel taint: 0

Starting from balanced:

     $ powerprofilesctl set power-saver
     $ echo $?
     0
     $ powerprofilesctl get
     balanced
     $ cat /sys/firmware/acpi/platform_profile
     balanced
     $ cat 
/sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference
     balance_power

I polled platform_profile every 20 ms around the request, which took
249 ms, and only observed "balanced"; it never transiently reported
"low-power". All CPU policies reported "balance_power". No relevant
kernel or power-profiles-daemon messages appeared.

Unlike my 7.1.3 report, the EPP is now "balance_power" rather than
"balance_performance", so the CPU-side behaviour is different. However,
7.2-rc5 does not fix the platform-profile part of the regression: the
request still returns success while platform_profile remains "balanced".

I asked the sol-max agent what the standard way to report this issue was 
and this mailing-list format is what it insisted I use. My apologies for 
that.


Regards,
Robert Munro