I have a fresh install of CachyOS. I just installed it by wiping the existing OS - using the entire drive. After installing the disk is no longer recognized as bootable. The motherboard is Asus X870 MAX Gaming. In BIOS under secure boot I have set OS Type to Other and Secore Boot Mode to custom (i…

Partition Table: msdos Somehow your Partition Table is set to MBR. But you should use GPT. It seems that something - at some point - set the Partition Table to msdos/MBR. Maybe your BIOS was set to CSM and Windows was installed in legacy mode (CSM). I thought Calamares (the installation tool)…

So this is a strange error - reinstalled a few times but it’s the same thing. First the BIOS setting. I cannot boot from the USB unless I enabled CSM. If I disabled it the only thing that shows up in my boot menu a network boot option. For some reason the disk I installed CachyOS on doesn’t show u…

can you try this ? [image] Unable To Boot into CachyOS Issues & Assistance i think some optoins in your Uefi motherboard failback to CSM / MBR mode can you recheck in your UEFI motherboard secureboot desactivated no CSM no legacy no fastboot all disks are on…

System: Kernel: 6.17.0-4-cachyos arch: x86_64 bits: 64 compiler: clang v: 20.1.8 clocksource: tsc avail: hpet,acpi_pm parameters: quiet nowatchdog splash rw rootflags=subvol=/@ root=UUID=7cb7dfa1-fc7b-433e-91bb-9237c07cad90 Desktop: KDE Plasma v: 6.4.5 tk: Qt v: N/A info: frameworks v: 6…

how did you create the USB iso ? on boot with live USB iso , can you see < UEFI >< USB vendor name> < partition 1 > ?

The USB iso I used to install CachyOS was just created with Etcher. The USB I use to boot into the installed CachyOS is actually a windows installation USB. I created that with dd. dd if=windows-installer.iso of=/dev/sda bs=4M conv=fdatasync status=progress

Thanks a bunch for the help. The main problem was that the USBs I created for some reason required CSM to be enabled to be able to boot. This is most likely because they were created on a computer with CSM enabled. I downloaded a fresh ISO and used my son’s computer and Rufus to force write it with…

BIOS Settings for Asus X870 MAX Gaming?

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stephane October 4, 2025, 5:36pm 4

can you try this ?