Hello,
I just tried twice to install Mageia 6 32-bit (Netinstall) on an Acer Travelmate 4000. Both times, there was nothing wrong during the install, but immediately after reboot the CPU fan on this laptop was running constantly. The system is so laggy that I had trouble typing in my username and password because some keystrokes were being missed.
When I finally got in, I ran top and the CPU load was around 3.20, yet no process in the list was using more than 1% CPU. The laptop only has 512MB of RAM so I did not select any desktop when installing, and set Xorg not to start at boot time.
I first suspected the non-free radeon driver that the Installer configured, so I tried booting with "nomodeset" added to the kernel boot parameters. Still no improvement. I then tried "nomodeset" plus "radeon.runpm=0" based on a quick Internet search of how to disable the radeon driver. It made no difference.
I tried re-installing, except this time I manually chose "Xorg-->vesa" as the driver. But upon reboot, the system was still extremely laggy. I tried booting to recovery mode, where the only processes were sh, systemd-journal and systemd-udevd. Based on that and the continued high cpu-load, I feel that there is some kernel module that is causing this behaviour.
Is there anything I can do to diagnose the problem? The high load doesn't occur on whatever configuration the kernel has in the Installer. It only happens in the installed system.