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Bug 401349 - kernel >= 3.2.2 refuses to load w83627ehf [sensors] - resource w83627ehf [io 0x0295-0x0296] conflicts with ACPI region HWRE [io 0x290-0x299]
Summary: kernel >= 3.2.2 refuses to load w83627ehf [sensors] - resource w83627ehf [io ...
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Bug Wranglers and Kernel Maintainers
URL: https://bugzilla.kernel.org/show_bug....
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-01-29 16:50 UTC by Manfred Knick
Modified: 2012-06-20 22:53 UTC (History)
1 user (show)

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Package list:
Runtime testing required: ---

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Description Manfred Knick 2012-01-29 16:50:42 UTC 
kernel >= 3.2.2 refuses to load w83627ehf
because w83627ehf conflicts with ACPI region HWRE

(verified on an AMD Phenom platform
as well as on an Intel Xeon platform).

Reproducible: Always

Steps to Reproduce:
1. build 3.2.2 with CONFIG_SENSORS_W83627EHF=y
2. < re-boot >
3. grep -i w83627ehf /var/log/messages
Actual Results:  
w83627ehf: Found NCT6776F chip at 0x290
resource w83627ehf [io  0x0295-0x0296] conflicts with ACPI region HWRE [io 0x290-0x299]


Expected Results:  
w83627ehf: Found [...] chip at 0x290

Opened this bug for others to find (and follow) upstream bug cited above more easily.
Comment 1 Manfred Knick 2012-01-29 16:53:07 UTC 
detected because lm_sensors seemed not to display fan readings any more ;)
Comment 2 Azamat H. Hackimov 2012-01-29 17:21:18 UTC 
There lspci would be more helpful, but try asus_atk0110 module instead (CONFIG_SENSORS_ATK0110).
Comment 3 Manfred Knick 2012-01-30 10:25:00 UTC 
(In reply to comment #2)
> ... instead ...

Details:

"Old Box" =
AMD Phenom(tm) 9950 Quad-Core on
ASUS M2N-SLI Deluxe
featuring 
it87 sensor chip (ISA bus, address 0x290),
formerly driven by  "CONFIG_SENSORS_IT87";
now sensors being read by "CONFIG_SENSORS_ATK0110"
_instead_ successfully in 3.2.2 - no conflicts.

"New Box" =
Intel(R) Xeon(R) CPU E31275 on
ASUS P8B WS (new C206 B3 version)
featuring 
Nuvoton NVT6776F (ISA bus, address 0x290),
formerly driven by  "CONFIG_SENSORS_W83627EHF";
now sensors being read by "CONFIG_SENSORS_ATK0110"
in 3.2.2 - no conflicts;
cpu-temp readings working; no (fan-)sensor readings available.

Similar findings with 3.0.18.

I presume, IFF these drivers can be configured "=y" simultaneously,
they should be expected not to be mutually exclusive
or conflict at boot / load time ?
Comment 4 Manfred Knick 2012-01-31 10:01:57 UTC 
Please c.f.
https://bugzilla.kernel.org/show_bug.cgi?id=42682#c3

A well written explanation:
http://www.lm-sensors.org/wiki/FAQ/Chapter3
#Mysensorshavestoppedworkinginkernel2.6.31
Comment 5 Manfred Knick 2012-01-31 21:05:45 UTC 
With "acpi_enforce_resources=lax"
enabling the load of W83627EHF,
Nuvoton NVT6776F readings are available.

asus_atk0110 is not capable of providing the NVT6776F readings yet.

So perhaps this bug should be modified to become
a beg for enhancement of asus_atk0110
so that loading of W83627EHF becomes obsolete again ?
Comment 6 Mike Pagano gentoo-dev 2012-06-20 22:53:50 UTC 
Will watch the upstream bug and backport and fixes identified.