[solved] PXE boot/nfsboot broken; Eoan Ermine; 19.10

[beta-tester]

hello,

since ubuntu 19.10 Eoan Ermine (beta & daily) PXE boot/nfsboot is broken from:
http://releases.ubuntu.com/eoan/ubuntu-19.10-beta-desktop-amd64.iso
and
http://cdimage.ubuntu.com/daily-live/pending/eoan-desktop-amd64.iso

when i use the same boot options as of ubuntu 19.04 (or 18.04 LTS), where it was working, i will get am error message now:
"
...
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Runnint /scripts/nfs-top ... done.
Begin: Running /scripts/nfs-premount ... done.
[...] FS-Cache: Loaded
[...] RPC: Registered named UNIX socket transport module.
[...] RPC: Registered udp transport module.
[...] RPC: Registered tcp transport module.
[...] RPC: Registered tcp NFSv4.1 backchannel transport module.
[...] FS-Cache: Netfs 'nfs' registered for caching
Bebin: /scripts/casper-premount ... done.
done.
Begin: Trying netboot from 192.168.1.1:/srv/nfs/ubuntu-daily-x64 ... Begin: Trying nfsmount -o nolock -o ro 192.168.1.1:/srv/nfs/ubuntu-daily-x64 /cdrom ... connect: Network is unreachable
NFS over TCP not available from 192.168.1.1
connect: Network is unreachable
connect: Network is unreachable
NFS over TCP not available from 192.168.1.1
connect: Network is unreachable
connect: Network is unreachable
NFS over TCP not available from 192.168.1.1
connect: Network is unreachable
connect: Network is unreachable
...
"

i use lpxelinux.0 as boot loader.
the pxe boot menu entry looks like:
    ########################################
    LABEL ubuntu-daily-x64
        MENU LABEL Ubuntu x64 Daily-Live
        KERNEL http://192.168.1.1/nfs/ubuntu-daily-x64/casper/vmlinuz
        INITRD http://192.168.1.1/nfs/ubuntu-daily-x64/casper/initrd
        APPEND nfsroot=192.168.1.1:/srv/nfs/ubuntu-daily-x64 ro netboot=nfs file=/cdrom/preseed/ubuntu.seed boot=casper -- debian-installer/language=de console-setup/layoutcode=de keyboard-configuration/layoutcode=de keyboard-configuration/variant=German
        TEXT HELP
            Boot to Ubuntu x64 Daily-Live
            User: ubuntu
        ENDTEXT

this ist the same as for ubuntu 19.04 Disco Dingo, and there i don't run into this error message

[beta-tester (alpha-beta-release)]

PXE boot from ubuntu 19.04 and ubuntu 18.04 is working.
since ubuntu 19.10 PXE boot is broken.

[beta-tester (alpha-beta-release)]

okay... solved.

for unknown reason i have to add ip=dhcp to the boot options now, what i didn't had in the past.

sorry for that report.
can be closed now.

[Robin (brobert420)]

I also had this problem and indeed, the solution was ip=dhcp. Thank you very much!

[ITEAS (info-tux-pc)]

Since 20.04.1 this is back, same error message. With 20.04 it still works.

[Daniel Ruzeu (druzeu)]

I was having the same issue "NFS over TCP not available...". I found I was missing ".disk" from the Ubuntu 20.04 ISO. I copied it to my nfs share and I'm now able to boot all the way with out issue.