On 11.01.2026 09:44, Milky wrote: > On Thursday, January 8th, 2026 at 7:46 AM, Jan Beulich <[email protected]> > wrote: > >>> The same is also true under Debian Live; does it mean that frequency >>> scaling, since it seems to be working under Debian Live, doesn't always >>> rely on this? >> >> >> Yes, that's possible afaik. Which driver is in use there? > > `/sys/devices/system/cpu/cpu0/scaling_driver` shows `intel_pstate`; confirmed > also using `dmesg`, which shows Intel P-state initialisation and HWP being > enabled. > >>> Maybe also with Xen's command line try cpufreq=xen:no-hwp to disable >>> HWP and see if the regular ACPI cpufreq driver works better > > Following from Marek's message elsewhwere in the thread, I now tried adding > in grub the correct Xen flag to disable HWP on Qubes: `cpufreq=xen,no-hwp`. I > am pasting below the output of `xl dmesg`. It seems it no longer reports HWP > being enabled. However, `xenpm get-cpufreq-para` still says "failed to get > cpufreq parameter", `xenpm get-cpufreq-states` returns nothing.
And was is meanwhile checked that ACPI provides the necessary tables, and xen-processor-acpi manages to processes and upload them? Jan
