Thank you for your input. I believe that the threshold should be changed if this is the case. There should be tiers to how much fan speed is associated to temperature of the system. A gradual increase would be way better than a full blast (… for a second).
That is the question that I am trying to get an answer for! That’s the reason that I created this thread.
I don’t know if there are multiple sensors, for example in the link @46hawk posted, there is also cpu-f75303, which I don’t know where it is. But if that’s in the CPU itself (from the name of it), with temp_fan_off = <46> and temp_fan_max = <54>, which is a very small range. And on the CPU die itself, temps probably spike a lot more, even from some short background task on an otherwise idle CPU (which then goes down quickly again because of the thermal mass of the cooler). So maybe that fan-curve is too aggressive? 
Either way; it’s something that I am not comfortable enough to mess with just yet. If users are experiencing this regardless of host OS, this is something the manufacturer (Framework) should take a look at.
I also have this little beast here and must say i’m happy with the noise levels. i also use firefox and it seems not to act like yours with the fan jumps. i also did a little browser benchmarking and it it started to give more cooling just in the upper 80 degrees (celsius).
regarding the question about multiple sensors or not - i thought of there are some more internal sensors for measuring hotspots in the cpu/apu but i cannot provide sources for this piece information (sorry about that).
Thank you for your response. I am also working on some out of the box Linux customizations. To assist myself in the future (in case I distro hop) I am tracking all of my configurations in a handy Libre Office file. I am daily driving Fedora for the first time on my AMD FW13, and it has been an interesting experience. Nice of you to mention auto_cpufreq. This is something I had recently learned about while doing some background research about power management on Linux. To my surprise, power management might as well be non-existent on Linux since it does barely anything (at least with the default tools). I first heard of the auto_cpufreq package from the Chris Titus Tech YT channel, where he covered the benefits of using it. From what he described, it looks fairly promising and I think I may check it out:
However, I hate to be the bearer of bad news, I don’t think this will address the rapid spikes in fan noise. Though it may help place a band-aid over the issue at least. I cannot say for sure, before I do more testing of my own.
Thank you (again) for your comment either way!
you are very welcome!
i like the idea of documenting the steps needed to create a reproducable workable linux installation on your baby! 
i also throught about that but in a more technical way (what i did not go so far). in my job our sysadmins use a tool called ansible to make such states reproducable by just running a “playbook” what is basically a configuration unit in a certain format. but i did not start with it yet.
when you are speaking of fedora - there is another post in this forum about OCI images - this is another step further by just creating dowloadable ready to use fedora images for the framework laptop with certain hardware configurations - but i think they are in the beginning of that topic. maybe you can provide your docs there
link to the topic: Custom Fedora OCI images for Framework laptops
have a nice evening!
Very cool! At my job, imaging software is only used for Windows systems.
I’ll need to check it out! A lot of this is so new to me (especially the concept of Linux images), so it will probably take a while before I can make meaningful contributions. Of course this is something that is possible, considering everything in Linux is a file. This is def something I should look in to more. If I can contribute to open source initiatives that make my life, and everyone else’s easier, I am all for it!
Tracking this. As you have new details please update it here. Thanks
I’m just weighing in here to say this is happening on my AMD 13" on Arch Linux also.
Also experiencing this in my AMD version with Ryzen 7640U. Happens once every 1~2 minutes. Not a big issue of everyday use, but I am a little wary about the potential impact of battery life since the moment a fan starting to spin is the most energy-consuming one to my knowledge. I wonder if the fan control can be smoothed a little bit to prevent it from being toggled frequently.
I’ve got the 13 AMD FW running Windows 11, all latest drivers (ones from the AMD site) and BiOS and it does this to me as well. Fan spins up to max for 1 second and then immediately stops. Laptop doesn’t even seem that hot and I don’t have much load on the machine – it has happened when I was just doing some very light web browsing in a 68F room.
I don’t have too many additional details to add at the moment, but I’ve had this happen to me too, in both Windows 11 and Arch Linux/EndeavorOS. The timing and frequency tends to vary pretty wildly in my experience, sometimes it might only happen once or twice in an hour long session, sometimes it spikes once every minute or two. I haven’t really put any time into figuring out if it depends on e.g. power saving settings, if the laptop is plugged in or not, etc., but I’ll pay more attention to these going forward and add details if I figure anything out.
I am seeing same fan behavior. I believe it make sense. Fan is off and temperature is slowly rising. Once it reaches some threshold, FW decides - it’s time to start fan (at lowest speed). Running fan causes the temperature to drop below threshold so fan is shut down. This repeats every few minutes.
And the fan speed spike? It’s “kick start”, where fan is started into higher speed for a moment and then it’s dialed down to expected speed. This is quite common, because fans are often not able to start into low speeds, but once spinning, they can be lowered into such speeds.
I believe that fan kick start is too aggressive here - too long and too strong.
I’m not sure how true that is of PWM fans, and even when using just voltage range to control a fan it still isn’t necessary to kickstart it at full pelt.
I have the same issue.
Fedora 39, Ryzen 7 7840u, 16GB/512GB Prebuilt
I’m only using the web browser with a couple of tabs
Been seeing this happen on mine since day 1.
Doing nothing fan quiet, fan spikes high for 1 second, fan off.
It is rather odd and can be jarring when working quietly.
OS: Ubuntu 22.04.3 LTS x86_64
DE: Unity
CPU: AMD Ryzen 7 7840U
Memory: 31266MiB
I just received my fw13 amd ryzen 5. And the fan has been going up and down abruptly a lot. For the 2 hours that the device has been on. The fan has been loud for the 99% of the time. I thought the amd version was quiet.
Update: the fan quieted itself after all the drivers have been installed.
Just wanted to mention, that I have the same issue on my FW 13 AMD Ryzen 5. I’m on Ubuntu 22.04.03.
Same issue for me, the fan seems to jump to full speed for 1 second and back down. AMD Ryzen 7 with EndeavourOS with kernel 6.7.3-arch1-2
It’s been about 3 months since this issue has been reported and many Framework AMD users seem to be affected by it.
Is there any update on resolving the bug? I’d highly appreciate it!
