Cannot install Ubuntu 24.04 properly

Update 2024-10-14: Using Ventoy I could easily install Kubuntu 24.04.1 on my laptop. But after install I got stuck in the grub menu with the same errors described below. Then I found out adding dis_ucode_ldr to the grub's linux command as described here, solves the problem. The strange part is that Ventoy successfully boots Ubuntu from USB without any issue and without disabling the microcode (Tested as described here in the section: "Checking the microcode version of your CPU"). So I reckon the problem is not related to the microcode but related to grub.

I created a bootable USB flash drive using Startup Disk Creator. During system boot, there were two choices to boot from it: SanDisk 'Cruzer Fit and UEFI: SanDisk 'Cruzer Fit, Partition 2. Kubuntu 22.04 was already installed in UEFI mode, so I chose the second one. Before seeing the GRUB options, two errors were printed (the first rror is not a typo, it was printed without e!)

rror: file '/boot/' not found.error: can't find command 'grub_platform'.

Then in the GRUB menu, choosing either Try or Install Ubuntu or Ubuntu (safe graphics) result in a black screen. After searching for hours I found out acpi was the culprit. So I tried disabling it by pressing c in the GRUB menu and then entering:

linux (hd0)/casper/vmlinuz root=(hd0) acpi=offinitrd (hd0)/casper/initrdboot

The above commands without acpi=off prints:

EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device pathEFI stub: Measured initrd data into PCR 9

and then nothing happens. But with acpi=off Ubuntu is booted from the USB flash drive, sadly, with 800x600 resolution. Anyway, I could easily install Ubuntu and after installation and rebooting the system I faced the same errors when booting from the SSD in which the Ubuntu was installed on. Now I gave up and switching back to 22.04 :-(, wait I can't! because I removed my 22.04.3 iso file and now I can't download it again because all 22.04releases point to 24.04.4 which itself causes another error:

[...] DMAR: [Firmware Bug]: No firmware reserved region can cover this RMMR [...], contact BIOS vendor for fixes[...] x86/cpu: SGX disabled by BIOS.

Tested with: Ubuntu 24.04, Kubuntu 24.04, Kubuntu 22.04.4 and KDE neon neon-user-20240502-0718 iso files.

System info:

ASUS N552VW,Latest BIOS release date: 2019/05/29,Processor: i7-6700HQ,Memory: 11.6 GiB of RAM,Graphics: NVIDIA 960m

References:

GNU GRUB Manual 2.12