When booting up, the kernel shows the following message:

[    2.160166] i915 0000:00:02.0: [drm] *ERROR* Stolen reserved area [mem
0xcf900000-0xcf9fffff] outside stolen memory [mem 0x8fa00000-0xb19fffff]

Nevertheless, the system boots into the desktop and I've found no other issues
related to that. But I think it should be fixed.

Kernel:
tux@linux:~> uname -r
6.4.0-150600.23.22-default

I use the onboard graphics of my Haswell Core i5-4xxx system with Q87 mainboard
chipset (shared memory, set to 1 GB in BIOS). Total RAM size is 16 GB.

00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen
Core Processor Integrated Graphics Controller (rev 06)