https://bugzilla.kernel.org/show_bug.cgi?id=210621
Bug ID: 210621
Summary: ACPI cpufreq driver sometimes gets detected and
sometimes it doesn't
Product: ACPI
Version: 2.5
Kernel Version: 5.8.14
Hardware: Intel
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Processor
Assignee: acpi_power-proces...@kernel-bugs.osdl.org
Reporter: kk0...@gmail.com
Regression: No
Created attachment 294091
--> https://bugzilla.kernel.org/attachment.cgi?id=294091&action=edit
dmesg of the boot when acpi cpufreq doesn't work
The machine is old OptiPlex 780. The problem started to appear after replacing
the CPU with Q8300.
On some boots the ACPI cpufreq is detected, and on some doesn't (intel_state
driver is disabled in kernel cmdline). What I found (and what looks related) is
that there are 5 line missing from the dmesg of not-working boot:
[ 0.024474] ACPI: SSDT 0x00000000BDBFFC40 000175 (v01 DpgPmm Cpu0Ist
00000011 INTL 20050624)
[ 0.024478] ACPI: SSDT 0x00000000BDC00049 000175 (v01 DpgPmm Cpu1Ist
00000011 INTL 20050624)
[ 0.024481] ACPI: SSDT 0x00000000BDC00452 000175 (v01 DpgPmm Cpu2Ist
00000011 INTL 20050624)
[ 0.024485] ACPI: SSDT 0x00000000BDC0085B 000175 (v01 DpgPmm Cpu3Ist
00000011 INTL 20050624)
[ 0.024488] ACPI: SSDT 0x00000000BDC00C64 000190 (v01 DpgPmm CpuPm
00000010 INTL 20050624)
and those lines where present in the dmesg when the ACPI cpufreq was working.
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