strange behaviour on newer kernel
#1
Hello,
I noticed that after upgrade to:


linux-image-4.4.154-1122-rockchip-ayufan-g7859b9b904a9 linux-headers-4.4.154-1122-rockchip-ayufan-g7859b9b904a9 linux-firmware-image-4.4.154-1122-rockchip-ayufan-g7859b9b904a9

My Fan stop and start, almost by itself..

Does anyone is experiencing the same?


I am um the bionic image..
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#2
(10-05-2018, 10:44 PM)tuxd3v Wrote: Hello,
I noticed that after upgrade to:


linux-image-4.4.154-1122-rockchip-ayufan-g7859b9b904a9 linux-headers-4.4.154-1122-rockchip-ayufan-g7859b9b904a9 linux-firmware-image-4.4.154-1122-rockchip-ayufan-g7859b9b904a9

My Fan stop and start, almost by itself..

Does anyone is experiencing the same?


I am um the bionic image..

Something that occurs me..
It could be that this newer kernel, only activate Fan, when temps reach 57°C ..

Because the hwmon facility, has 3 or 4 options..
which include
Throtling, and Active Thermal

And so maybe it is a feature..??
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#3
cooling-levels = <0 80 170 230>;

lines: 279...286 and 645...669
_____________________________________________________________________________________________________________________________________________
my SOHO NAS RockPro64 4GB v2.1 / eMMC 32GB / PCIe -> 4*SATA Marvell 88SE9235 / SD-card 64 GB / NAS Casing / image Debian Stretch Minimal / Kernel 4.4.xxx ayufan
my Multimedia desktops: ASUS H310T G5500, ODROIDs -XU4, -XU3, -C2, -C1;
my trash BananaPi; RPi B, B+; ODROID-W
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#4
(10-06-2018, 12:32 PM)romtorwator Wrote: cooling-levels = <0 80 170 230>;

lines: 279...286 and 645...669

thanks for that  Shy
the fan will need more power at start.

For example in fanctl I start it like:
130
200ms
190
1 second
so that it can gain momentum, then I set the pwm to a value, imagine 40.
The fan already started it can then be at 40..
I don't advise going lower than 30-35, it depends again..

because of it, I choose 40 as minimum..
  Reply


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