FreeBSD and DELL (Intel Graphics Battle)

For information purposes only, this post is about my personal experience installing FreeBSD 14.4 and 15 on my two laptops: a Dell G15 (13th Gen Intel Core i5) with Hybrid Graphics / Advanced Optimus (Intel Graphics + GeForce RTX 3050) and a basic Dell Inspiron (12th Gen Intel Core i3) with Intel Graphics only.

Dell G15

After overcoming some issues with the Wi-Fi driver, I completed a successful installation. Everything was going well; the installed drm-kmod (Intel) loaded properly, and Xorg was working fine. However, when running KDE Plasma following the default procedures explained in the Handbook, I faced an issue after the login screen. KDE was running, but it was extremely sluggish. I tried several tweaks, but nothing worked. Initially, I thought the problem was caused by both graphics cards working together, but I later discovered that I was wrong.

Dell Inspiron

With FreeBSD running on the G15, I tried the same approach on the Inspiron. I followed the Handbook guide and installed KDE, only to face the EXACT SAME PROBLEM.

I tested the environment using both X11 (Xorg) and Wayland, but KDE was lagging heavily on both display servers. Refusing to give up, I tried a different approach and installed XFCE instead. Guess what? It worked perfectly! Replicating this XFCE setup back on the G15 yielded the same successful result.

Conclusion

I have no idea what the root cause is, whether it stems from plasma components, Wayland/X11 integrations, or something similar, but KDE appears to be struggling with recent Intel Graphics generations (12th and 13th Gen). My question to the community is: Is this happening only with Dell laptops, or are most people experiencing the same issue on other devices with newer Intel graphics?
 
Thanks for the information pebkac , but if that is the case no idea. 12th and 13th gen igpus are more than fast enough to run KDE.
I myself don't use KDE for years, so possibly I'm mis-understanding.

Possibly, if the issue is related with timerfd, and if something in KDE core components are using timerfd for, i.e., synchronization or timing source, mis-behavior of timerfd could result in sluggish KDE.

And as OP states Xfce works fine, it wouldn't be issues in GPU drivers, Wayland nor X11, but KDE.
 
the OP needs too answer if he has installed either 15.0-RELEASE-p6, 14.4-RELEASE-p2, 14.3-RELEASE-p11: patch releases .
the CLock issue affects one CORE for about 10- 15 minutes after boot. if your CPU has 6 to 12 cores the problem is not so large as on an older laptop with dual or quad core cpu.
 
In really i didn't install the 15.0-RELEASE-p6 and 14.4-RELEASE-p2 or p11. So maybe this is the problem, i will try to install and i return here to give you all a feedback. Thank you so much =)
 
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