/sys/class/hwmon not populated on Jessie

[Maurice H.]

I tried this image: https://rcn-ee.com/rootfs/bb.org/testing/2015-12-13/lxqt-4gb/bone-debian-8.2-lxqt-4gb-armhf-2015-12-13-4gb.img.xz

As I understand it this is the most recent jessie build. 

Unfortunately on this image /sys/class/hwmon is not populated.

It *is* populated on the wheezy builds. 

Do I need to install a package or kernel-module that solves this problem?

Or is there a fix in the pipeline?

[Robert Nelson]

TI deemed the internal temp sensor too "inaccurate" to push mainline..

Feel free to downgrae to 3.8.x if you need it:

cd /opt/scripts/tools/
git pull
sudo ./update_kernel.sh --bone-channel --stable

Regards,

--
Robert Nelson
https://rcn-ee.com/

[Maurice H.]

I did. Thanks. 

Any chance this could be implemented by a third-party? Or is the TI-code a proprietary blob?

[Robert Nelson]

On Sat, Dec 19, 2015 at 12:39 PM, Maurice H. <maus...@gmail.com> wrote:
>
> I did. Thanks.
>
> Any chance this could be implemented by a third-party? Or is the TI-code a
> proprietary blob?

Yeah, it's easy to fix:

sudo ln -s /dev/urandom /sys/class/hwmon/temp_sensor

okay so it's not "that" bad.. But /dev/urandom is more 'consistent'...

But bad enough, TI hardware engineers told TI kernel developers to not
bother pushing it upstream.

This has been discussed previously on this list..

[Maurice H.]

I know this has been discussed and I understand TI's POV. I apologize if I seemed pushy or something. That is not my intention. It's just that I currently see data coming from my BBB that seems reasonable, although slightly offset. There seems to be a nice correlation with changes in room-temperature too.

Anyway, it was just me wondering. Never mind. I'll retire my code.

Thanks for the answer. Really appreciating your effort.

[William Hermans]

Yeah, it's easy to fix:

sudo ln -s /dev/urandom /sys/class/hwmon/temp_sensor

. . .

LMAO !

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[Robert Nelson]

On Sat, Dec 19, 2015 at 1:34 PM, Maurice H. <maus...@gmail.com> wrote:
> I know this has been discussed and I understand TI's POV. I apologize if I
> seemed pushy or something. That is not my intention. It's just that I
> currently see data coming from my BBB that seems reasonable, although
> slightly offset. There seems to be a nice correlation with changes in
> room-temperature too.

http://permalink.gmane.org/gmane.linux.linaro.devel/16501

[William Hermans]

One can not help but wonder. Why have a "thing" at all, if it doesn't work properly . . . and this isn't the first "thing" on this SoC which doesn't work properly . . .