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Date: Sat, 22 Aug 2009 12:54:08 +0200 From: Stefan Richter <stefanr@...6.in-berlin.de> To: Robert Hancock <hancockrwd@...il.com> CC: Gene Heskett <gene.heskett@...izon.net>, Linus Torvalds <torvalds@...ux-foundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: 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/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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