I've been having very similar issues on a lenovo legion laptop, disabling intel_iommu helped but doing so wouldn't give me results as smooth as windows/manjaro.
One thing that i noticed is that if my cpu (i7 10750h) gets stressed enough and reach high temperatures Ubuntu will throttle all cores to 800mhz.
Disabling thermald with `sudo systemctl stop thermald && sudo systemctl disable thermald && sudo shutdown -r now` apparently fixed the issue for my laptop. I even removed the `intel_iommu=off` workaround from /etc/default/grub since it seems it's no longer necessary and my system is still super smooth so far
I've been running multiple cpu-heavy docker images from work and the max temperature I recorded in any core was 95C, for reference according to sensors i7-10750h considers any temp up to 100C as high, only above that is that it becomes critical.
Since those images stresses my system a lot (even on manjaro) it's safe to say that even after disabling thermald cpu cooling is still working, otherwise my laptop would've probably shut off by this point
I've been having very similar issues on a lenovo legion laptop, disabling intel_iommu helped but doing so wouldn't give me results as smooth as windows/manjaro.
One thing that i noticed is that if my cpu (i7 10750h) gets stressed enough and reach high temperatures Ubuntu will throttle all cores to 800mhz.
Disabling thermald with `sudo systemctl stop thermald && sudo systemctl disable thermald && sudo shutdown -r now` apparently fixed the issue for my laptop. I even removed the `intel_iommu=off` workaround from /etc/default/grub since it seems it's no longer necessary and my system is still super smooth so far
I've been running multiple cpu-heavy docker images from work and the max temperature I recorded in any core was 95C, for reference according to sensors i7-10750h considers any temp up to 100C as high, only above that is that it becomes critical.
Since those images stresses my system a lot (even on manjaro) it's safe to say that even after disabling thermald cpu cooling is still working, otherwise my laptop would've probably shut off by this point