[lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't read

[lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't read

[John Brier]

[root@tb303 ~]# sensors
Can't access procfs/sysfs file
Kernel interface access error
For 2.6 kernels, make sure you have mounted sysfs and libsensors
was compiled with sysfs support!

I have Debian 4.0 with 2.10.1-3 lm-sensors and libsensors3. I read
http://www.lm-sensors.org/wiki/Kernel2.6

"In kernel 2.6.22, the way the I2C adapters are presented in sysfs
changed, and this affects libsensors. You will need lm_sensors version
2.10.3 or later. Alternatively, the kernel can be compiled with
CONFIG_SYSFS_DEPRECATED=y, then version 2.10.2 will work too. Older
versions of lm_sensors will complain that the I2C adapter names can't
be read. This is only a warning though. "

So in my kernel 2.6.26.5 I have

# grep CONFIG_SYSFS_DEPRECATED /boot/config-2.6.26.5
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y

yet I still get this "warning" If it's only a warning why don't I get
the actual readings from my hardware? I looked into upgrading to
lm-sensors 3 and libsenseors4 packages from Debian testing tree but
the dependencies were pretty bad, I might as well upgrade the whole
system to testing.

I have run sensors-detect and have the proper modules loaded.

John Brier

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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[John Brier]

I should also mention that I have /sys mounted

sysfs on /sys type sysfs (rw)

On Mon, Dec 22, 2008 at 5:50 PM, John Brier <johnbrier@gmail.com> wrote:
> [root@tb303 ~]# sensors
> Can't access procfs/sysfs file
> Kernel interface access error
> For 2.6 kernels, make sure you have mounted sysfs and libsensors
> was compiled with sysfs support!
>
> I have Debian 4.0 with 2.10.1-3 lm-sensors and libsensors3. I read
> http://www.lm-sensors.org/wiki/Kernel2.6
>
> "In kernel 2.6.22, the way the I2C adapters are presented in sysfs
> changed, and this affects libsensors. You will need lm_sensors version
> 2.10.3 or later. Alternatively, the kernel can be compiled with
> CONFIG_SYSFS_DEPRECATED=y, then version 2.10.2 will work too. Older
> versions of lm_sensors will complain that the I2C adapter names can't
> be read. This is only a warning though. "
>
> So in my kernel 2.6.26.5 I have
>
> # grep CONFIG_SYSFS_DEPRECATED /boot/config-2.6.26.5
> CONFIG_SYSFS_DEPRECATED=y
> CONFIG_SYSFS_DEPRECATED_V2=y
>
> yet I still get this "warning" If it's only a warning why don't I get
> the actual readings from my hardware? I looked into upgrading to
> lm-sensors 3 and libsenseors4 packages from Debian testing tree but
> the dependencies were pretty bad, I might as well upgrade the whole
> system to testing.
>
> I have run sensors-detect and have the proper modules loaded.
>
> John Brier
>

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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[John Brier]

On Mon, Dec 22, 2008 at 5:50 PM, John Brier <johnbrier@gmail.com> wrote:
> [root@tb303 ~]# sensors

I should mention I do have sysfs mounted
sysfs on /sys type sysfs (rw)

I'm trying with a second kernel now

$ grep SYSFS /boot/config-2.6.27.10-JBstrikesagain
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_ACPI_SYSFS_POWER=y
CONFIG_SYSFS=y

still no go.

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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[Jean Delvare]

Hi John,

Le Lundi 22 Décembre 2008 23:50, John Brier a écrit :
> [root@tb303 ~]# sensors
> Can't access procfs/sysfs file
> Kernel interface access error
> For 2.6 kernels, make sure you have mounted sysfs and libsensors
> was compiled with sysfs support!
> 
> I have Debian 4.0 with 2.10.1-3 lm-sensors and libsensors3. I read
> http://www.lm-sensors.org/wiki/Kernel2.6
> 
> "In kernel 2.6.22, the way the I2C adapters are presented in sysfs
> changed, and this affects libsensors. You will need lm_sensors version
> 2.10.3 or later. Alternatively, the kernel can be compiled with
> CONFIG_SYSFS_DEPRECATED=y, then version 2.10.2 will work too. Older
> versions of lm_sensors will complain that the I2C adapter names can't
> be read. This is only a warning though. "
> 
> So in my kernel 2.6.26.5 I have
> 
> # grep CONFIG_SYSFS_DEPRECATED /boot/config-2.6.26.5
> CONFIG_SYSFS_DEPRECATED=y
> CONFIG_SYSFS_DEPRECATED_V2=y

Preliminary note: using something as old as lm-sensors 2.10.1 with
a kernel as recent as 2.6.26.5 doesn't make much sense IMHO. We do
our best to preserve compatibility but it's hard to always get it
right.

> yet I still get this "warning" If it's only a warning why don't I get
> the actual readings from my hardware?

The warning documented above is unrelated to your problem, this is
why.

> I looked into upgrading to 
> lm-sensors 3 and libsenseors4 packages from Debian testing tree but
> the dependencies were pretty bad, I might as well upgrade the whole
> system to testing.

Shouldn't be. For one thing you should be able to install libsensors3
and libsensors4 in parallel. Once this is done you should be able to
upgrade lm-sensors (and only lm-sensors) from version 2.x to version
3.x. I am no Debian expert though, maybe I'm missing something.

> I have run sensors-detect and have the proper modules loaded.

Which modules are these?

Please provide the full output of sensors-detect.

Did this system ever work with a different combination of lm-sensors
version and kernel version? And what system is this?

-- 
Jean Delvare

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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[John Brier]

On Thu, Dec 25, 2008 at 9:29 AM, Jean Delvare <khali@linux-fr.org> wrote:
> Hi John,
Hi Jean! thanks for responding!

>
> Preliminary note: using something as old as lm-sensors 2.10.1 with
> a kernel as recent as 2.6.26.5 doesn't make much sense IMHO. We do
> our best to preserve compatibility but it's hard to always get it
> right.
>

Fair enough. I expected this.

>> yet I still get this "warning" If it's only a warning why don't I get
>> the actual readings from my hardware?
>
> The warning documented above is unrelated to your problem, this is
> why.
>
>> I looked into upgrading to
>> lm-sensors 3 and libsenseors4 packages from Debian testing tree but
>> the dependencies were pretty bad, I might as well upgrade the whole
>> system to testing.
>
> Shouldn't be. For one thing you should be able to install libsensors3
> and libsensors4 in parallel. Once this is done you should be able to
> upgrade lm-sensors (and only lm-sensors) from version 2.x to version
> 3.x. I am no Debian expert though, maybe I'm missing something.

lm-sensors 3 and libsensors 4 want a newer version of libc6 than I
have installed, and upgrading that seems like a bad idea (it would
probably force upgrading all the packages on the system since they all
depend on libc6, thus I might as well move the whole system from
debian stable to debian testing) In the end this may be the only
solution :-(

==============[root@tb303 ~]# dpkg -i libsensors4_3.0.2-1+b2_amd64.deb
(Reading database ... 30914 files and directories currently installed.)
Preparing to replace libsensors4 1:3.0.2-1+b2 (using
libsensors4_3.0.2-1+b2_amd64.deb) ...
Unpacking replacement libsensors4 ...
dpkg: dependency problems prevent configuration of libsensors4:
 libsensors4 depends on libc6 (>= 2.7-1); however:
  Version of libc6 on system is 2.3.6.ds1-13etch7.
dpkg: error processing libsensors4 (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libsensors4
[root@tb303 ~]# dpkg -i lm-sensors_3.0.2-1+b2_amd64.deb
(Reading database ... 30914 files and directories currently installed.)
Preparing to replace lm-sensors 1:2.10.1-3 (using
lm-sensors_3.0.2-1+b2_amd64.deb) ...
Unpacking replacement lm-sensors ...
dpkg: dependency problems prevent configuration of lm-sensors:
 lm-sensors depends on libc6 (>= 2.7-1); however:
  Version of libc6 on system is 2.3.6.ds1-13etch7.
 lm-sensors depends on libsensors4 (>= 1:3.0.0-1); however:
  Package libsensors4 is not configured yet.
dpkg: error processing lm-sensors (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 lm-sensors
[root@tb303 ~]# dpkg -i libc6_2.7-16_amd64.deb
dpkg: regarding libc6_2.7-16_amd64.deb containing libc6:
 libc6 conflicts with tzdata-etch
  tzdata provides tzdata-etch and is installed.
dpkg: error processing libc6_2.7-16_amd64.deb (--install):
 conflicting packages - not installing libc6
Errors were encountered while processing:
 libc6_2.7-16_amd64.deb
[root@tb303 ~]# dpkg -p libc6
Package: libc6
Priority: required
Section: libs
Installed-Size: 11468
Maintainer: GNU Libc Maintainers <debian-glibc@lists.debian.org>
Architecture: amd64
Source: glibc
Version: 2.7-16
Provides: glibc-2.7-1
Depends: libgcc1
Suggests: locales, glibc-doc
Conflicts: libterm-readline-gnu-perl (<< 1.15-2), tzdata (<< 2007k-1),
tzdata-etch
Filename: pool/main/g/glibc/libc6_2.3.6.ds1-13etch5_amd64.deb
Size: 4936850
MD5sum: d25329a43a9631173dac87a4ed161ee5
Description: GNU C Library: Shared libraries
 Contains the standard libraries that are used by nearly all programs on
 the system. This package includes shared versions of the standard C library
 and the standard math library, as well as many others.
==============


>
>> I have run sensors-detect and have the proper modules loaded.
>
> Which modules are these?

i2c_nforce2
w83627hf
k8temp is compiled directly into the kernel (non modular).


>
> Please provide the full output of sensors-detect.
http://pastebin.ca/1293524

>
> Did this system ever work with a different combination of lm-sensors
> version and kernel version? And what system is this?

Yes it worked with an older kernel and same version of lm-sensors (not
certain on the version of lm-sensors because I've updated since then
of course, this was a year ago that it worked). The kernel it used to
work on (I can test this again) was 2.6.20.1.

The system is MSI K8N Neo4 Platinum nforce4 based motherboard.
http://www.msicomputer.com/product/p_spec.asp?model=K8N_Neo4_Platinum&class=mb

John Brier

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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[Jean Delvare]

Hi John,

Le Jeudi 25 Décembre 2008 19:05, John Brier a écrit :
> lm-sensors 3 and libsensors 4 want a newer version of libc6 than I
> have installed, and upgrading that seems like a bad idea (it would
> probably force upgrading all the packages on the system since they all
> depend on libc6, thus I might as well move the whole system from
> debian stable to debian testing) In the end this may be the only
> solution :-(

Ah, OK then. I only thought about libsensors compatibility issues,
not system-wide compatibility issues such as glibc.

That being said, I am a little surprised that Debian offers no half
way between lm-sensors 2.10.1 (over 2 year old!) and 3.0.2 (fairly
recent).

> > Which modules are these?
> 
> i2c_nforce2
> w83627hf
> k8temp is compiled directly into the kernel (non modular).

Please note that i2c-nforce2 isn't actually needed.

> > Please provide the full output of sensors-detect.
> http://pastebin.ca/1293524

Looks sane.

> > Did this system ever work with a different combination of lm-sensors
> > version and kernel version? And what system is this?
> 
> Yes it worked with an older kernel and same version of lm-sensors (not
> certain on the version of lm-sensors because I've updated since then
> of course, this was a year ago that it worked). The kernel it used to
> work on (I can test this again) was 2.6.20.1.

In kernel 2.6.22, the w83627hf driver was converted from an i2c-isa
driver to a platform driver. Even though this is supposedly supported
since lm-sensors 2.10.0, this may still be the cause for the
compatibility problem you're seeing, given how old lm-sensors 2.10.1
is.

Probably the best way to make sure what the exact problem is is to
run "strace sensors" and see where the failure occurs.

It would also be a good idea to check that everything is OK on the
kernel side. What does the following command return?

grep . /sys/class/hwmon/hwmon*/device/name

-- 
Jean Delvare

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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[John Brier]

On Thu, Dec 25, 2008 at 2:40 PM, Jean Delvare <khali@linux-fr.org> wrote:
> Probably the best way to make sure what the exact problem is is to
> run "strace sensors" and see where the failure occurs.
>
> It would also be a good idea to check that everything is OK on the
> kernel side. What does the following command return?
>
> grep . /sys/class/hwmon/hwmon*/device/name
I did the grep and then ran the strace on sensors and all the sudden
it was working! Could a grep and strace make it work?! No...

So apparently dpkg *did* install the newer lm-sensors 3 and
libsensors4.. and now it works. LOL. This just shows my inexperience
with Debian. (I know Red Hat based distros the best). Well I guess the
issue is resolved now.. Not sure how this happened when it clearly
looked like it failed dependencies..

[root@tb303 log]# dpkg -p lm-sensors
Package: lm-sensors
Priority: extra
Section: utils
Installed-Size: 560
Maintainer: Aurelien Jarno <aurel32@debian.org>
Architecture: amd64
Source: lm-sensors-3 (1:3.0.2-1)
Version: 1:3.0.2-1+b2
Depends: sed (>= 4.0.5-1), libc6 (>= 2.7-1), libsensors4 (>= 1:3.0.0-1), perl
Suggests: sensord, read-edid, i2c-tools
Filename: pool/main/l/lm-sensors/lm-sensors_2.10.1-3_amd64.deb
Size: 126438
MD5sum: 1577df796b8e4502b6499450cd0fd1b5
Description: utilities to read temperature/voltage/fan sensors
 Lm-sensors is a hardware health monitoring package for Linux. It allows you
 to access information from temperature, voltage, and fan speed sensors. It
 works with most newer systems.
 .
 This package contains programs to help you set up and read data from
 lm-sensors.
Homepage: http://www.lm-sensors.org

[root@tb303 log]# dpkg -p libsensors4
Package: libsensors4
Priority: optional
Section: libs
Installed-Size: 212
Maintainer: Aurelien Jarno <aurel32@debian.org>
Architecture: amd64
Source: lm-sensors-3 (1:3.0.2-1)
Version: 1:3.0.2-1+b2
Depends: makedev (>= 2.3.1-45) | udev, ucf (>= 0.28), libc6 (>= 2.7-1)
Recommends: lm-sensors
Size: 63588
Description: library to read temperature/voltage/fan sensors
 Lm-sensors is a hardware health monitoring package for Linux. It allows you
 to access information from temperature, voltage, and fan speed sensors. It
 works with most newer systems.
 .
 This package contains a shared library for querying lm-sensors.
Homepage: http://www.lm-sensors.org

I had the older libsensors3 installed too but I just removed it.
Sensors was generating some syntax reading errors on the old config
file but i used sensors-conf-convert to fix that. I'm 100% back in
business. Still not sure how that install went forward when I didn't
actively force it.

[root@tb303 log]# sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:       +21.8�C  (crit = +96.8�C)

k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:  +26.0�C

w83627thf-isa-0290
Adapter: ISA adapter
VCore:       +1.07 V  (min =  +0.00 V, max =  +3.84 V)
+12V:       +12.65 V  (min =  +5.59 V, max =  +7.78 V)   ALARM
+3.3V:       +3.12 V  (min =  +2.82 V, max =  +1.31 V)   ALARM
+5V:         +5.01 V  (min =  +0.16 V, max =  +2.19 V)   ALARM
-12V:       -11.95 V  (min = -14.91 V, max =  -4.38 V)
V5SB:        +5.00 V  (min =  +2.61 V, max =  +1.40 V)   ALARM
VBat:        +2.98 V  (min =  +1.39 V, max =  +1.41 V)   ALARM
fan1:          0 RPM  (min = 28125 RPM, div = 2)  ALARM
CPU Fan:    2083 RPM  (min =   -1 RPM, div = 8)  ALARM
fan3:       5625 RPM  (min = 3688 RPM, div = 2)
M/B Temp:    +32.0�C  (high =  +4.0�C, hyst =  +1.0�C)  ALARM  sensor
= thermistor
CPU Temp:    +32.0�C  (high = +80.0�C, hyst = +75.0�C)  sensor = thermistor
temp3:       +13.5�C  (high = +21.0�C, hyst = +17.0�C)  sensor = diode
cpu0_vid:   +0.000 V
beep_enable:enabled

I guess this means I have the wrong version of libc6 installed now.
I'm off to figure out if I broke my system.. lol

John Brier
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Re: [lm-sensors] lm-sensors 2.10.1 with newer 2.6.x.x kernel can't

[John Brier]

On Thu, Dec 25, 2008 at 3:50 PM, John Brier <johnbrier@gmail.com> wrote:
> I guess this means I have the wrong version of libc6 installed now.
> I'm off to figure out if I broke my system.. lol

As it turns out dpkg -i installed the packages libsensors4 and
lm-sensors 3 but did not fully install them. libc6 was unchanged. Now
dselect wants to remove them because of the unmet libc6 requirement
when I upgrade. So I'm having Debian issues now. Thanks very much Jean
for helping me!

John

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