From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 19262] CPU0 locked at slower speed, regardless of governor
Date: Thu, 30 Sep 2010 12:35:50 GMT
Message-ID: <201009301235.o8UCZoG7014379@demeter1.kernel.org>
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https://bugzilla.kernel.org/show_bug.cgi?id=19262
Thomas Renninger changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|cpufreq |Power-Thermal
AssignedTo|trenn@suse.de |acpi_power-thermal@kernel-b
| |ugs.osdl.org
Product|Power Management |ACPI
--- Comment #5 from Thomas Renninger 2010-09-30 12:35:45 ---
... and this is the bug, probably BIOS related:
/proc/acpi/thermal_zone/THRM/trip_points
passive: 0 C: tc1=4 tc2=3 tsp=60 devices=CPU0
Please also attach dmesg and acpidump output.
The param to workaround this issue is:
thermal.psv = 50
to e.g. let the CPU get throttled at 50 C.
There already is a blacklist in drivers/acpi/thermal.c:
static struct dmi_system_id thermal_dmi_table[] __initdata = {
...
{
.callback = thermal_psv,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
Also attach dmidecode, if we do not find a generic kernel workaround/fix the
BIOS can get blacklisted to not use the passive trip point by default.
Reassigning to ACPI component -> this is an acpi problem.
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