On Wed, Nov 11, 2026 at 12:53 AM Angela Arch Linux <[email protected]> wrote:
> Hi Timothy, > > First, don't worry about the `bash: acpi-cpufreq: command not found` > error—you accidentally typed the *output* of `cat` as a command. The actual > output was `acpi-cpufreq`, which confirms the driver is still the legacy > one. > > Now, about why `amd_pstate=active` didn't take effect. This is likely a > deeper hardware/firmware issue: > > 1. Check if your CPU actually supports `amd_pstate`. Run: > `grep -i cppc /proc/cpuinfo` > If there's no `cppc` flag, your CPU or BIOS doesn't expose the required > ACPI CPPC interface, and `amd_pstate` will refuse to load. > cppc is present. > 2. Check your BIOS settings. Look for options like "CPPC", "ACPI CPPC", or > "Global C-state Control" and make sure they are enabled. > > 3. Check if the `amd_pstate` module is even available: > `modinfo amd_pstate` > If it says "not found", your Debian kernel might not have it compiled in > for your CPU family. > sudo modinfo amd_pstate modinfo: ERROR: Module amd_pstate not found. > > If none of these work, your HP Pavilion might be too old for `amd_pstate`, > and `acpi-cpufreq` is the only driver it can use. In that case, the > "Performance" profile might simply not be supported by your hardware on > Debian. > > Let me know what `grep -i cppc /proc/cpuinfo` shows. > > Hope this helps. > > > ---- 回复的原邮件 ---- > 发件人 Timothy M Butterworth<[email protected]> > <[email protected]> > 日期 2026年11月11日 13:50 > 收件人 Angela Arch Linux<[email protected]> <[email protected]> > 抄送至 heck-schneider<[email protected]> > <[email protected]>、debian-user<[email protected]> > <[email protected]> > 主题 Re: Re: Re: Power Profiles not supported > > > On Wed, Nov 11, 2026 at 12:24 AM Angela Arch Linux <[email protected]> > wrote: > >> To add the parameter, just run this command in your terminal (no need to >> use Vim): >> >> sudo sed -i >> 's/GRUB_CMDLINE_LINUX_DEFAULT="/GRUB_CMDLINE_LINUX_DEFAULT="amd_pstate=active >> /' /etc/default/grub >> sudo update-grub >> sudo reboot >> > > I modified the GRUB command line as shown: > > GRUB_CMDLINE_LINUX_DEFAULT="amd_pstate=active quiet splash > > I updated GRUB and I still load acpi-cpufreq > > `cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver` > bash: acpi-cpufreq: command not found > > > > >> >> ---- 回复的原邮件 ---- >> 发件人 Timothy M Butterworth<[email protected]> >> <[email protected]> >> 日期 2026年11月11日 13:15 >> 收件人 Angela Arch Linux<[email protected]> <[email protected]> >> 抄送至 heck-schneider<[email protected]> >> <[email protected]>、debian-user<[email protected]> >> <[email protected]> >> 主题 Re: Re: Power Profiles not supported >> >> >> On Tue, Nov 10, 2026 at 10:49 PM Angela Arch Linux <[email protected]> >> wrote: >> >>> Hi, >>> >>> Since you mentioned the same kernel works on Fedora, it's likely a >>> missing >>> power management daemon or firmware dependency in Debian. >>> >>> Try installing "thermald" (Intel) or "amd64-microcode" (AMD). >>> Also, check if your CPU requires the specific P-State driver: >>> >> >> I have: >> amd64-microcode/testing,now 3.20260923.1 amd64 [installed] >> Platform firmware and microcode for AMD CPUs and SoCs >> >> and >> intel-microcode/testing,now 3.20260925.1 amd64 [installed] >> Processor microcode firmware for Intel CPUs >> >> My processor is actually AMD. >> >> For PState I have: >> librte-power-amd-pstate26/testing,now 25.11.4-1 amd64 [installed] >> Data Plane Development Kit (librte-power-amd-pstate runtime library) >> >> sudo apt install thermald intel-microcode >>> sudo systemctl enable --now thermald >>> >> >> I installed thermald but it is not supported. >> Nov 11 00:04:54 hp-pavilion.home.arpa systemd[1]: Starting >> thermald.service - Thermal Daemon Service... >> Nov 11 00:04:54 hp-pavilion.home.arpa thermald[33197]: Unsupported cpu >> model or platform >> >> After rebooting, check if "Performance" appears in "powerprofilesctl >>> list". >>> >>> Another possibility: Fedora might be loading a specific firmware that >>> Debian >>> keeps in "non-free-firmware". Check "dmesg | grep -i power" to see if >>> the CPU is complaining about missing ACPI or thermal tables. >>> >> >> sudo dmesg | grep -i power >> [ 0.246664] thermal_sys: Registered thermal governor 'power_allocator' >> [ 0.418642] ACPI: \_SB_.PCI0.GPP2.DEV0.PWRE: New power resource >> [ 0.419128] ACPI: \_SB_.PCI0.GP17.XHC0.P0U0: New power resource >> [ 0.419172] ACPI: \_SB_.PCI0.GP17.XHC0.P3U0: New power resource >> [ 0.419434] ACPI: \_SB_.PCI0.GP17.XHC1.P0U1: New power resource >> [ 0.419477] ACPI: \_SB_.PCI0.GP17.XHC1.P3U1: New power resource >> [ 0.419741] ACPI: \_SB_.P0S0: New power resource >> [ 0.419757] ACPI: \_SB_.P3S0: New power resource >> [ 0.419802] ACPI: \_SB_.P0S1: New power resource >> [ 0.419817] ACPI: \_SB_.P3S1: New power resource >> [ 0.422872] ACPI: \_SB_.PRWL: New power resource >> [ 0.429670] Low-power S0 idle used by default for system suspend >> [ 0.448425] pci 0000:04:00.1: D0 power state depends on 0000:04:00.0 >> [ 0.448434] pci 0000:04:00.3: extending delay after power-on from >> D3hot to 20 msec >> [ 0.448579] pci 0000:04:00.4: extending delay after power-on from >> D3hot to 20 msec >> [ 0.958457] PM: genpd: Disabling unused power domains >> [ 1.122915] input: Power Button as >> /devices/platform/PNP0C0C:00/input/input1 >> [ 1.124077] ACPI: button: Power Button [PWRB] >> [ 6.458155] sr 1:0:0:0: Power-on or device reset occurred >> [ 24.492652] wlo1: Limiting TX power to 23 (23 - 0) dBm as advertised >> by 18:a5:ff:1c:da:27 >> >> The only thing that stood out was: >> [ 0.958457] PM: genpd: Disabling unused power domains >> >> Tim >> >> >>> Hope this helps. >>> >>> >>> ---- 回复的原邮件 ---- >>> 发件人 Timothy M Butterworth<[email protected]> >>> <[email protected]> >>> 日期 2026年11月11日 08:50 >>> 收件人 derlyne<[email protected]> <[email protected]> >>> 抄送至 Debian User<[email protected]> >>> <[email protected]> >>> 主题 Re: Power Profiles not supported >>> >>> >>> On Tue, Nov 10, 2026 at 7:26 AM derlyne <[email protected]> >>> wrote: >>> >>>> The package to install to manage power profiles is >>>> `power-profiles-daemon`. It provides the system service and the >>>> `powerprofilesctl` command; the required dependencies are installed >>>> automatically. >>>> >>>> sudo apt install power-profiles-daemon >>>> sudo systemctl enable --now power-profiles-daemon >>>> >>> >>> I already have this installed and running. >>> >>> To display and change profiles graphically, the interface depends on >>>> your desktop environment: GNOME and KDE Plasma include this functionality >>>> in their settings or power-management tools. You generally don’t need to >>>> install a separate package if those components are already installed. >>>> >>> >>> I have KDE. >>> >>> >>>> >>>> Check the detected profiles with: >>>> >>>> powerprofilesctl list >>>> >>>> >>>> “Power Saver” and “Balanced” are normally available; “Performance” >>>> depends on hardware support. >>>> >>> >>> Performance shows up if I boot Fedora and I am able to switch the >>> profiles from the system tray battery widget. Both Fedora and Forky have >>> the 7.2 Linux kernel so it does not appear to be a kernel support issue. >>> >>> >>>> (... gmail...) >>>> >>> >>> >>> -- >>> ⢀⣴⠾⠻⢶⣦⠀ >>> ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system >>> ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org/ >>> ⠈⠳⣄⠀⠀ >>> >> >> >> -- >> ⢀⣴⠾⠻⢶⣦⠀ >> ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system >> ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org/ >> ⠈⠳⣄⠀⠀ >> > > > -- > ⢀⣴⠾⠻⢶⣦⠀ > ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system > ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org/ > ⠈⠳⣄⠀⠀ > -- ⢀⣴⠾⠻⢶⣦⠀ ⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system ⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org/ ⠈⠳⣄⠀⠀
