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    SubjectRe: Regression: Linux 2.6.31-rc7 lost sensors on asus mobo
    On Saturday 22 August 2009, Robert Hancock wrote:
    >On 08/21/2009 09:09 PM, Gene Heskett wrote:
    >> On Friday 21 August 2009, Linus Torvalds wrote:
    >>> You know the drill, so all together now: "Another week, another -rc
    >>> kernel".
    >> Another rebuild didn't help:
    >> Thinking it didn't load it87, I tried again:
    >> [root@coyote 3.002005]# modprobe it87
    >> FATAL: Error inserting it87
    >> (/lib/modules/2.6.31-rc7/kernel/drivers/hwmon/it87.ko): Device or
    >> resource busy [root@coyote 3.002005]# sensors
    >> No sensors found!
    >> Make sure you loaded all the kernel drivers you need.
    >> Try sensors-detect to find out which these are.
    >> Been there, done that, no joy.
    >> 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
    >> From uname -a
    >> Linux coyote.coyote.den 2.6.31-rc7 #2 SMP PREEMPT Fri Aug 21 22:37:38 EDT
    >> 2009 i686 athlon i386 GNU/Linux
    >> .config is attached, in case I've screwed the moose.
    >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.

    That module is loaded right now while I'm on rc5,

    [root@coyote]# lsmod|grep asus
    asus_atk0110 8124 0
    hwmon 2552 2 it87,asus_atk0110
    [root@coyote hwmon]# lsmod|grep it87
    it87 20908 0
    hwmon_vid 2780 1 it87
    hwmon 2552 2 it87,asus_atk0110

    and all seems well. I just went through a make xconfig for about 30 minutes,
    looking to see if there was someplace to select that and actually make it
    work in place of the it87 module.

    I was not able to locate such an option. Now what?

    Thanks, Robert.

    Cheers, Gene
    "There are four boxes to be used in defense of liberty:
    soap, ballot, jury, and ammo. Please use in that order."
    -Ed Howdershelt (Author)
    The NRA is offering FREE Associate memberships to anyone who wants them.

    Having a wonderful wine, wish you were beer.

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