Last Tuesday, I updated my firmware from 13.2.x to 13.3.0.
Since then I observe a steep drop of my CPU frequency.
What has caused this? Is this normal?
)
Thanks for the response.
Out of curiosity : why is your CPU freq. approx 1.5GH dropping to 1.3GHz, while mine is 1.35 dropping to 0.9GHz? 
What does your CPU temperature look like? It might simply be throttling with the whole of Europe being a sauna at the moment.
Might need to start looking at water-cooling the next generation Homey if climate change continues like this
Of course rising as well. Could be throttling, although we had peaks of high temperature before.
@Doekse I checked my v13.3.0 installation date & time which where Wednesday Jun 24, 15.50hr.
That is the exact moment the clock speed went down (timed around Jun 24, 16.00hr)
Let’s see if it is the temperature and if it comes down next week. Also interested what others observe. See temp. below:
I see @Peter_Kawa has even higher temperatures (72degC)
Ruud
:
I do see a sharp spike in CPU load and temperature at the exact moment the clock speed dropped. Have you tried rebooting it?
As usual we are beta testing
@Doekse Rebooted yesterday evening. Approx 10 hours later, I can say that rebooting hasnt changed it. The device keeps running at low frequency.
For reference, I am seeing the same on my Homey Pro 2023. After the update the CPU clock frequency went down to 0.87 GHz.
I quickly checked with the team, and the most likely explanation is that the move to the Debian Bookworm base also changed the CPU frequency governor.
On Debian Bullseye, the default governor was typically ondemand, whereas newer kernels used by Debian Bookworm generally default to schedutil. The main difference is that schedutil adjusts the CPU frequency much more dynamically based on the scheduler, while ondemand periodically samples CPU utilization and often keeps the CPU at higher frequencies for longer.
As a result, seeing the CPU frequency continuously jump between different clock speeds is expected behaviour with schedutil. This can cause the reported CPU utilization to appear slightly higher (because the CPU spends more time at lower frequencies).
So, in essence, what you’re seeing is a Homey that is managing its CPU resources more efficiently. Instead of keeping the CPU running at its maximum frequency all the time, it continuously scales the clock speed up and down to match the current workload. This reduces unnecessary power consumption and heat generation while still allowing the CPU to ramp up to full performance whenever it is needed 
Homey starts throttling at 85°C so that isn’t whats happening here. You can also double check this by going to the Homey Developer Tools → System and check if the throttle values are true or false.
@Doekse Abe, thank you very much for prompt reply and clarification.
I checked for throttle factor and found :
| ideoCoreThrottleCurrently | false |
|---|---|
| videoCoreThrottleOccured | false |
Ruud
I’m having serious Thread issues since firmware v13.3 was installed
CPU core speed dropping below 1ghz every so often and tons of thread devices dropping off the network and taking a good hour to get back online
A stinky update that has clearly pushed the power supply to it’s limit and that’s caused the Thread radio to become underpowered
Classic Athom, not enough inhouse testing before pushing updates live and now all of our lives become more stressful as a result
