Bug 215801
Summary: | Rmmod'ing amd-pstate doesn't restore acpi-cpufreq | ||
---|---|---|---|
Product: | Power Management | Reporter: | Artem S. Tashkinov (aros) |
Component: | cpufreq | Assignee: | linux-pm (linux-pm) |
Status: | RESOLVED WILL_NOT_FIX | ||
Severity: | normal | CC: | Perry.Yuan, perry_yuan |
Priority: | P1 | ||
Hardware: | x86-64 | ||
OS: | Linux | ||
Kernel Version: | 5.17.1 | Subsystem: | |
Regression: | No | Bisected commit-id: |
Description
Artem S. Tashkinov
2022-04-05 01:43:08 UTC
Huang Rui, Is this doable or I'm asking too much? This is still relevant as of Linux 6.6. Would be great if removing amd-pstate enabled acpi-cpufreq. (In reply to Artem S. Tashkinov from comment #2) > This is still relevant as of Linux 6.6. > > Would be great if removing amd-pstate enabled acpi-cpufreq. Normally the system hardware needs to reinitialize CPPC and low-level power management firmware when CPPC driver loading, so it better to change grub parameters and reboot again. dynamically removing amd-pstate and load acpi_cpufreq probably cause some potential issues. Perry. (In reply to Perry Yuan(AMD) from comment #3) > (In reply to Artem S. Tashkinov from comment #2) > > This is still relevant as of Linux 6.6. > > > > Would be great if removing amd-pstate enabled acpi-cpufreq. > > Normally the system hardware needs to reinitialize CPPC and low-level power > management firmware when CPPC driver loading, so it better to change grub > parameters and reboot again. > dynamically removing amd-pstate and load acpi_cpufreq probably cause some > potential issues. > > Perry. Could you add this as a note to the amd pstate driver documentation? Documentation/admin-guide/pm/amd-pstate.rst Thank you! (In reply to Artem S. Tashkinov from comment #4) > (In reply to Perry Yuan(AMD) from comment #3) > > (In reply to Artem S. Tashkinov from comment #2) > > > This is still relevant as of Linux 6.6. > > > > > > Would be great if removing amd-pstate enabled acpi-cpufreq. > > > > Normally the system hardware needs to reinitialize CPPC and low-level power > > management firmware when CPPC driver loading, so it better to change grub > > parameters and reboot again. > > dynamically removing amd-pstate and load acpi_cpufreq probably cause some > > potential issues. > > > > Perry. > > Could you add this as a note to the amd pstate driver documentation? > > Documentation/admin-guide/pm/amd-pstate.rst > > Thank you! Sure, we can add this to amd-pstate.rst with a new update. Perry. |