H2 fan

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H2 fan

Unread post by VinceB » Mon Dec 17, 2018 11:04 pm

GM, My H2 is up and running. I'm quite pleased. However, the fan does not run at all. I have used xsensors and the CPU is relatively cool @ 55 - 60C. Should the fan be running? If it should be can I test for faults? TNX Vince

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Re: H2 fan

Unread post by Yostarone » Tue Dec 18, 2018 3:58 am

have you turned on the fan in the bios?

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Re: H2 fan

Unread post by odroid » Tue Dec 18, 2018 10:29 am


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Re: H2 fan

Unread post by jamesgould » Tue Dec 18, 2018 5:01 pm

Installed my new fan. This is what the case type 4 looks like with the fan installed. See attached pics.
odroid_fan2.jpg
Case type 4 with fan
odroid_fan2.jpg (2.36 MiB) Viewed 1358 times
odroid_fan1.jpg
Case type 4 with fan installed
odroid_fan1.jpg (2.58 MiB) Viewed 1358 times
Using Debian 9.6 kernel 4.9.0-8-amd64
Running Windows guest VM with multiple busy tabs in browser and playing movie on main OS.
Previously CPU temp hits well over 80 degrees celcius regularly. With fan installed CPU temp does not get over 70. On average, stays around 60 degrees celcius under decent load.

I think case type 4 definitely needs the fan, especially if you are using nvme because it drives up the heat in the case.

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Re: H2 fan

Unread post by rooted » Tue Dec 18, 2018 5:15 pm

That doesn't look bad, a bit like a set of stairs but not bad ;)

In any small case the device will get relatively warm, all devices do. Even my Pi gets hot in a small case. Thanks for the information and for sharing the images.

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Re: H2 fan

Unread post by KuJoe » Tue Dec 18, 2018 10:26 pm

jamesgould wrote:Installed my new fan.
Did you set yours to intake or exhaust? I did some stress testing and I'm hitting 77C after a 10 minute CPU + GPU stress test with a Noctua 92x14mm fan (NF-A9x14) but I ordered a new fan off Ameridroid with the correct connector so I'll be changing it out soon.

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Re: H2 fan

Unread post by VinceB » Wed Dec 19, 2018 12:48 am

Many thanks for the prompt and courteous reply. All is well. Fan cycles nicely. CPU is cool.

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Re: H2 fan

Unread post by jamesgould » Wed Dec 19, 2018 11:25 am

KuJoe wrote:Did you set yours to intake or exhaust?
Mine is working effectively as inflow. How about yours?

I figured since its positioned right above the heat sink this may be much more effective.

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Re: H2 fan

Unread post by KuJoe » Wed Dec 19, 2018 10:09 pm

jamesgould wrote:
KuJoe wrote:Did you set yours to intake or exhaust?
Mine is working effectively as inflow. How about yours?

I figured since its positioned right above the heat sink this may be much more effective.
I went with exhaust since my office can get pretty warm so I'd rather have it pulling hot air away from the heatsink instead of blowing warm/hot air on it.

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Re: H2 fan

Unread post by tkaiser » Wed Dec 19, 2018 11:45 pm

KuJoe wrote:I went with exhaust since my office can get pretty warm so I'd rather have it pulling hot air away from the heatsink instead of blowing warm/hot air on it.
Are H2 and the fan in two different rooms? I mean where does the air come from that will be sucked into H2's enclosure when you put an exhaust fan above the heatsink?
rooted wrote:In any small case the device will get relatively warm, all devices do.
That's why efficient cases have the heatsink on the outside to allow for maximum passive convection outside of the enclosure and eliminate conductivity issues inside. ODROID-HC1 and HC2 are very good examples of this efficient design approach.

I really wonder why all this stuff is solely based on assumptions (and not measurements that seem to be rather simple and fast when done correctly) and why nobody seems to care about one specific air ingredient called dust. With forced convection in those fan scenarios without dust filters on the intakes the H2 will end up being the dust filter.

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Re: H2 fan

Unread post by jamesgould » Thu Dec 20, 2018 12:36 am

KuJoe wrote:I went with exhaust since my office can get pretty warm
Might I find out if you are using case type 4 as well? If so I'd be interested to know the details and how it goes, ie. ambient room temp, OS/Kernel and CPU temps under load.

Just that my guess is that the exhaust option will not work with case type 4.

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Re: H2 fan

Unread post by tkaiser » Thu Dec 20, 2018 1:20 am

jamesgould wrote:Just that my guess is that the exhaust option will not work with case type 4.
Can't you simply flip the fan and measure yourself to avoid 'apple vs. oranges' comparisons? I could imagine that an exhaust fan doesn't work that efficient since it's all about forced convection between the heatsink fins and air choosing the path of least resistance. But why assuming if it's that easy to simply try it out and measure? AFAIK /sys/class/hwmon/hwmon0/temp1_input contains the relevant SoC temperature.

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Re: H2 fan

Unread post by KuJoe » Thu Dec 20, 2018 11:43 am

jamesgould wrote:
KuJoe wrote:I went with exhaust since my office can get pretty warm
Might I find out if you are using case type 4 as well? If so I'd be interested to know the details and how it goes, ie. ambient room temp, OS/Kernel and CPU temps under load.

Just that my guess is that the exhaust option will not work with case type 4.
I have the Type 2 case. When my new fan arrives and I take it apart I'll do a quick test to see if intake vs exhaust is better.

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Re: H2 fan

Unread post by jamesgould » Thu Dec 20, 2018 6:05 pm

tkaiser wrote:
Thu Dec 20, 2018 1:20 am
Can't you simply flip the fan and measure
Hey tkaiser and KuJoe, you will see when you get the fan, I think the screws that come with the fan are thread-forming. Unscrewing the fan numerous times may wear out the screw holes. So I am trying to avoid it.

At present the intake option for case type 4 has been very effective.

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Re: H2 fan

Unread post by psomero » Wed Jan 02, 2019 7:23 am

jamesgould wrote:
Thu Dec 20, 2018 6:05 pm
tkaiser wrote:
Thu Dec 20, 2018 1:20 am
Can't you simply flip the fan and measure
Hey tkaiser and KuJoe, you will see when you get the fan, I think the screws that come with the fan are thread-forming. Unscrewing the fan numerous times may wear out the screw holes. So I am trying to avoid it.

At present the intake option for case type 4 has been very effective.


unless you're doing it like 50 times, I wouldn't worry about the threads wearing out. Just be mindful to not overtorque them.

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Re: H2 fan

Unread post by mad_ady » Mon May 13, 2019 11:04 pm

I have a weird problem with the fan on my H2 (I'm using Hardkernel's fan). It's enabled in BIOS (https://wiki.odroid.com/odroid-h2/appli ... enable_fan) with 55/65/70 thresholds.
I'm running ubuntu 19.04 and doing some software video transcoding that takes temperature well into the 70s. However the fan never starts. Is there anything to configure on the linux side? I haven't upgraded my bios, but I think the changes were only for memory compatibility.
The weird thing is - the fan rotates a couple of times (while in BIOS) if I remove and replug the connector (when the temperature is over the limit). There is no noise to indicate mechanical problems with the fan.

Is there any way I can force it on/change PWM from userspace?

Here are my current readings:

Code: Select all

adrianp@lego:~$ sensors
emc2103-i2c-0-2e
Adapter: SMBus I801 adapter at f040
fan1:           FAULT  (div = 4)
temp1:        +47.6 C  (low  =  +0.0 C, high = +85.0 C)
temp2:        +47.1 C  (low  =  +0.0 C, high = +85.0 C)
temp3:        +46.9 C  (low  =  +0.0 C, high = +85.0 C)

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +63.0 C  (crit = +95.0 C)

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +64.0 C  (high = +105.0 C, crit = +105.0 C)
Core 0:        +64.0 C  (high = +105.0 C, crit = +105.0 C)
Core 1:        +63.0 C  (high = +105.0 C, crit = +105.0 C)
Core 2:        +63.0 C  (high = +105.0 C, crit = +105.0 C)
Core 3:        +63.0 C  (high = +105.0 C, crit = +105.0 C)

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Re: H2 fan

Unread post by mad_ady » Mon May 13, 2019 11:39 pm

I spoke too soon. It seems that the board temperature is the trigger, no the core temperature:

Code: Select all

adrianp@lego:~$ sensors
emc2103-i2c-0-2e
Adapter: SMBus I801 adapter at f040
fan1:        2070 RPM  (div = 4)
temp1:        +55.8 C  (low  =  +0.0 C, high = +85.0 C)
temp2:        +54.9 C  (low  =  +0.0 C, high = +85.0 C)
temp3:        +54.5 C  (low  =  +0.0 C, high = +85.0 C)

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +70.0 C  (crit = +95.0 C)

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +70.0 C  (high = +105.0 C, crit = +105.0 C)
Core 0:        +70.0 C  (high = +105.0 C, crit = +105.0 C)
Core 1:        +70.0 C  (high = +105.0 C, crit = +105.0 C)
Core 2:        +70.0 C  (high = +105.0 C, crit = +105.0 C)
Core 3:        +70.0 C  (high = +105.0 C, crit = +105.0 C)


Fan works ok, but the H2 is without a case currently so there is quite a temperature difference between core and board temperature.

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Re: H2 fan

Unread post by odroid » Tue May 14, 2019 9:20 am

It looks normal.
My H2 board temperature is 53°C and CPU temperature is 64.0°C while web browsing several heavy sites on multiple tabs. I don't use a cooling fan at this moment.
BTW, do you run Kernel 5.0 with Ubuntu 19.04? Is it stable enough for continuous video transcoding?

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Re: H2 fan

Unread post by mad_ady » Tue May 14, 2019 1:45 pm

It's stock 5.0.3 and yes, I've had no problems with it. :)
But the video transcoding is done in software only. Haven't had time to look into hardware accelerated transcoding yet.

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Re: H2 fan

Unread post by odroid » Tue May 14, 2019 2:05 pm

Cool!
I've updated to Ubuntu 19.04 from 18.10 and there is no issue so far.
It looks more stable and an intermittent suspend/resume kernel panic issue seems to be gone away after updating. :D :mrgreen:

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