[Letux-kernel] thermal madness
Andreas Kemnade
andreas at kemnade.info
Fri Sep 13 21:44:44 CEST 2019
Hi,
I was experimenting a bit a bit with the thermal:
fresh after rebooting and autoidling uarts and loading some modules I
made the letux3704 device consume 32mA, so I expect the temperature to
being low.
Reading the thermal gives this:
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
58500
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
47000
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
47000
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
47000
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
47000
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
47000
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
48500
root@(none):/# cat /sys/devices/virtual/thermal/thermal_zone0/temp
48500
That is just the opposite to what Nikolaus was getting. Here it jumps
down instead of up and stays stable.
My conclusion: the measurements are buffered somewhere/somehow and we
are getting something old here.
Regards,
Andreas
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