Since I've always had the problem that the cinnmon produced quite some CPU utilisation when playing videos (which didn't bother me that much) I've re-installed gnome and tried its gnome-classic session.

Originally I've assumed it was only a kernel problem, so I've reported the issue I describe my tests in more details, so it's worth a look. it's just the temperature (and CPU fans) which go crazy. Interestingly, on 5.4, the cinnamon CPU utilisation as shown by top, isn't much different from what I see on 5.2.

the email list of Evolution or Thunderbird (which is just a list of subject/from/date lines. Similarly, when scrolling up/down quickly in e.g. When playing videos or quickly moving windows, 90-100☌ are reached quite quickly, and even if the 'responsible' action is stopped, it take 10 mins or more, until the temperature goes back to 'normal' values (which are still 10-15 ☌ higher than with kernel 5.2). When cinnamon runs, even when it's idle and no video whatsoever is played, the CPU temperature increased at average between 10-15 ☌.

In such situation, the cinnamon process went up to 30 or 40%īut when I've recently upgraded from linux 5.2 to 5.3 (and it still persists with 5.4) the situation got just extreme.

I've always had the issue that when playing videos (despite hardware acceleration being used), CPU utilisation got quite high, especially when playing fullscreen. The system has a Intel(R) Core(TM) i7-7600U CPU 2.80GHz. * Intel(R) HD Graphics 620 (Kaby Lake GT2) / Kernel driver in use: i915 / Xorg uses modesetting * Cinnamon 4.2.4 (not running in software rendering mode)

Ubuntu intel graphics driver avc1