Posts by bootit

    rootwait and rootdelay= parameters don't help. The SD card root is either detected early enough or not at all.

    But a netconsole= parameter makes SD card detection "reliable", even if the network driver is not built-in and netconsole stops immediately. And any delay introduced seems to be less than a second. I know and agree, this does not make sense, but it is the case. Linux 5.17 and 5.19 working.

    Would a different bios even help?

    Is there any "known best" bios version (as opposed to just the latest)?


    I have an APU board, trying to describe it:

    PCEngines apu2

    coreboot build 20160307

    4080 MB ECC DRAM

    SeaBIOS (version ?-20160307_153453-michael-desktop64)

    Found mainboard PC Engines PCEngines apu2

    multiboot: eax=0, ebx=0

    boot order:


    it has 3 1G ethernet ports, and 4 GBytes RAM.

    This has always been extremely hard to get booted. It can't boot from SD card, it is absolutely required to boot from USB (and it is very hard to find a USB device that works). Then, in Linux, it is completely impossible to mount root from USB, even as devices are claimed to be found. The root partition HAS to be on SD Card. And it takes many many repeat attempts to boot, to find the SD card. (An "sdhci" controller is always found, but almost never the partitions on the SD card) Since Linux kernel 5.18, there is no way to mount any root.

    What is it?

    Is there any Bios that is more reliable?