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SubjectRe: Regression: Linux 2.6.31-rc7 lost sensors on asus mobo
Robert Hancock wrote:
> On 08/21/2009 09:09 PM, Gene Heskett wrote:
>> From messages when I attempt to access the it87:
>> Aug 21 22:59:37 coyote kernel: [ 572.507928] it87: Found IT8716F chip at 0x290, revision 1
>> Aug 21 22:59:37 coyote kernel: [ 572.507937] it87: in3 is VCC (+5V)
>> Aug 21 22:59:37 coyote kernel: [ 572.507939] it87: in7 is VCCH (+5V Stand-By)
>> Aug 21 22:59:37 coyote kernel: [ 572.508232] ACPI: I/O resource it87 [0x295-0x296] conflicts with ACPI region IP__ [0x295-0x296]
>> Aug 21 22:59:37 coyote kernel: [ 572.508234] ACPI: Device needs an ACPI driver
...
> The ACPI AML on your machine indicates that the BIOS may attempt to
> access the it87 hardware, and the kernel now by default blocks it87 from
> requesting those ports as it may conflict with what the BIOS is trying
> to do. On some machines, the ACPI BIOS accesses hardware monitoring
> chips itself to manage ACPI thermal zones, etc. and the conflicting
> access can cause incorrect temperature readings and other bad behavior.
>
> You can try acpi_enforce_resources=lax on the kernel command line to
> restore the previous behavior. Or for some Asus boards, you can try the
> asus_atk0110 ACPI driver instead of it87.

PS: There have been previous reports, e.g. those logged as
http://bugzilla.kernel.org/show_bug.cgi?id=13967
--
Stefan Richter
-=====-==--= =--- =-==-
http://arcgraph.de/sr/


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