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Just a PSA: there's a regression in ACPI CPU driver introduced in 5.15.35, 5.16.11, 5.17 kernels and not fixed in these branches to this day (5 May 2022).
The system would hang shortly after the boot, or the boot may not complete at all. On my VIA C7 platform, it most of the time evinces after network activity. The issue also present on Pentium 3 / Pentium M.
The issue was introduced by ACPI: processor idle: Allow playing dead in C3 state commit and fixed by not yet merged into current branches ACPI: processor: idle: Avoid falling back to C3 type C-states commit.
The system would hang shortly after the boot, or the boot may not complete at all. On my VIA C7 platform, it most of the time evinces after network activity. The issue also present on Pentium 3 / Pentium M.
The issue was introduced by ACPI: processor idle: Allow playing dead in C3 state commit and fixed by not yet merged into current branches ACPI: processor: idle: Avoid falling back to C3 type C-states commit.
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