Re: [PATCH] ACPI: add "auto" to acpi_enforce_resources

Len Brown
2009-02-04T05:52:26Z

On Thu, 29 Jan 2009, Luca Tettamanti wrote:

> Aside from ASUS the problem is generic since there are two drivers
> poking at the same hardware; for example there are reports of native
> drivers interfering with normal TZ polling (see [1]).

FYI,

While it is slightly off-topic of the (I agree, real)
technical issue here, note that polling is not "normal" on ACPI systems.
[1] was on SuSE Linux 10.0, which on their own decided to
over-ride the kernel and enable thermal zone polling by default.

This turned out to be a bad idea because it exposed BIOS bugs
in ACPI thermal zones that were never exposed on other operating
systems - evidently because the other operating systems never
poll thermal zones, they are entirely event driven.

cheers,
Len Brown, Intel Open Source Technology Center

> Luca
> [1] http://www.lm-sensors.org/ticket/2072 and:
> http://thread.gmane.org/gmane.linux.drivers.sensors/12359