Solved Boot log before '---<<BOOT>>---'

There's no mounted filesystem at that point so they are not recorded in any log file. You can enable the serial console and observe them there. Check the man of loader(8)
 
balanga said:
Are the initial boot msgs displayed before '---<<BOOT>>---' recorded anywhere?
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So far I assumed they're written by the bootloader, so, probably not (and they shouldn't be of particular interest either).

If for some reason, you WANT to study them, the only method I could think of is configuring loader to use a serial console and capture them with another machine…

balanga said:
dmesg doesn't seem to include them...
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Well, dmesg displays the kernel's ringbuffer, so for that to work, the kernel must have started.
 
VladiBG said:
There's no mounted filesystem at that point so they are not recorded in any log file. You can enable the serial console and observe them there. Check the man of loader(8)
Click to expand...
Just out of interest how could I view the serial output from a laptop which does not have a serial port?
 
Depending if your laptop have Intel AMT you can use serial over lan using Intel Manageability commander. If this is UEFI boot then the messages that you will see there are from loader.efi before the loading of the kernel so you will need to build your loader.efi with debug options

UEFI - OSDev Wiki

wiki.osdev.org wiki.osdev.org
 
Seems a bit too complicated.... I thought there may be possible using some sort of using USB cable...
 
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