How to debug PXE kerrnel boot failure
I’ve got a weird problem and looking for possible pointers.
On at least one of our servers, kernel 5.10.0-0.deb10.16-amd64
boots without a problem. Bat as we don’t want to rely on an “ancient” kernel build for Debian Buster, we also tried various later ones but they all fail to start in the same way. Taking for example 6.1.0-11-amd64
from Debian Bookworm, this one would boot fine from local disk, but the very same one loaded via DHCP/PXE/TFTP would load the kernel and initrd seemingly fine but then only print
<span style="color:#323232;">early console in setup code
</span><span style="color:#323232;">Probing EDD (edd=off to disable)... ok
</span>
and then hang, i.e. the newly loaded kernel does not even start. Kernel command line options include already
<span style="color:#323232;">debug loglevel=7 ro console=ttyS1,115200n8 earlyprintk=serial,ttyS1,115200n8 console=tty0
</span>
and I don’t get any more info from the system, neither via serial port nor at the console.
Anyone with pointers?
Edit: edd=off
results in the very same except the corresponding line missing from output