Re: Pressing the power button causes the device to freeze completely (schedutil involved)

[Evgeny Sagatov]

I noticed that for powersave mode, I'm getting the following values:
cat /proc/cpuinfo | grep MHz
cpu MHz         : 2798.689
cpu MHz         : 1999.659
cpu MHz         : 1999.797
cpu MHz         : 2741.103
Also, there's now no difference in the single-core benchmark between
schedutil, ondemand, powersave and performance modes. The benchmark
always gives a very high result.
This wasn't the case before; the modes had different performance levels.

I switched to ondemand, did a reset and waited a few minutes:
grep -r . /sys/devices/system/cpu/cpufreq/
/sys/devices/system/cpu/cpufreq/ondemand/up_threshold:95
/sys/devices/system/cpu/cpufreq/ondemand/ignore_nice_load:0
/sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor:1
/sys/devices/system/cpu/cpufreq/ondemand/powersave_bias:0
/sys/devices/system/cpu/cpufreq/ondemand/sampling_rate:8000
/sys/devices/system/cpu/cpufreq/ondemand/io_is_busy:1
/sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq:2000000
/sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors:ondemand
performance schedutil
/sys/devices/system/cpu/cpufreq/policy0/freqdomain_cpus:0 1 2 3
/sys/devices/system/cpu/cpufreq/policy0/scaling_governor:ondemand
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq:2834000
/sys/devices/system/cpu/cpufreq/policy0/scaling_available_frequencies:2834000
2000000
/sys/devices/system/cpu/cpufreq/policy0/related_cpus:0 1 2 3
/sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq:2000000
/sys/devices/system/cpu/cpufreq/policy0/scaling_setspeed:<unsupported>
grep: /sys/devices/system/cpu/cpufreq/policy0/stats/reset: Access denied
/sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:   From  :    To
/sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:         :
2834000   2000000
/sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:  2834000:
      0        80
/sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:  2000000:
     80         0
/sys/devices/system/cpu/cpufreq/policy0/stats/total_trans:160
/sys/devices/system/cpu/cpufreq/policy0/stats/time_in_state:2834000 397
/sys/devices/system/cpu/cpufreq/policy0/stats/time_in_state:2000000 68525
/sys/devices/system/cpu/cpufreq/policy0/affected_cpus:0 1 2 3
/sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq:2834000
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_transition_latency:160000
/sys/devices/system/cpu/cpufreq/policy0/scaling_driver:acpi-cpufreq
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_min_freq:2000000
/sys/devices/system/cpu/cpufreq/policy0/cpuinfo_avg_freq:2000000
/sys/devices/system/cpu/cpufreq/policy0/bios_limit:2834000

чт, 30 апр. 2026 г. в 13:53, Rafael J. Wysocki <rafael@xxxxxxxxxx>:
>
> On Thu, Apr 30, 2026 at 12:40 PM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
> >
> > On Wed, Apr 29, 2026 at 11:17 PM Evgeny Sagatov
> > <evgeny.sagatov@xxxxxxxxx> wrote:
> > >
> > > The PC froze when I pressed the power button.
> >
> > Well, we need to dig more I guess.
> >
> > > grep -r . /sys/devices/system/cpu/cpufreq/
> > > /sys/devices/system/cpu/cpufreq/schedutil/rate_limit_us:240
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq:2000000
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors:performance
> > > schedutil
> > > /sys/devices/system/cpu/cpufreq/policy0/freqdomain_cpus:0 1 2 3
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor:schedutil
> > > /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq:2834000
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_available_frequencies:2834000
> > > 2000000
> > > /sys/devices/system/cpu/cpufreq/policy0/related_cpus:0 1 2 3
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq:1999759
> >
> > This kind of calls for some investigation.  It should not be less than
> > scaling_min_freq, even though this looks like a rounding error.
> >
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_setspeed:<unsupported>
> > > grep: /sys/devices/system/cpu/cpufreq/policy0/stats/reset: Отказано в доступе
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:   From  :    To
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:         :
> > > 2834000   2000000
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:  2834000:
> > >       0       844
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/trans_table:  2000000:
> > >     843         0
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/total_trans:1687
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/time_in_state:2834000 1164
> > > /sys/devices/system/cpu/cpufreq/policy0/stats/time_in_state:2000000 14130
> > > /sys/devices/system/cpu/cpufreq/policy0/affected_cpus:0 1 2 3
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq:2834000
> > > /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_transition_latency:160000
> > > /sys/devices/system/cpu/cpufreq/policy0/scaling_driver:acpi-cpufreq
> > > /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_min_freq:2000000
> > > /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_avg_freq:1999759
> > > /sys/devices/system/cpu/cpufreq/policy0/bios_limit:2834000
> >
> > So with the same patch applied (because I think that the one-policy
> > configuration is suitable for this platform), please capture the
> > output of
> >
> > grep -r . /sys/devices/system/cpu/cpufreq/
>
> Actually, the step above isn't necessary.
>
> > switch over to the ondemand governor,
>
> It is better to reset the cpufreq statistics after switching over to
> ondemand by writing 1 to
>
> /sys/devices/system/cpu/cpufreq/policy0/stats/reset
>
> as root.  Then, wait for some time and capture the output of
>
> grep -r . /sys/devices/system/cpu/cpufreq/
>
> just once.
>
> > wait for some time, capture the
> > output of the above command again and send both.
> >
> > Also, please send the output of
> >
> > grep . /sys/firmware/acpi/interrupts/sci*
> >
> > acquired after doing all of the above.
> >
> > You may as well check again if the power button works after switching
> > to ondemand.