bionic mini.iso dhcp falls

[gregrwm]

dhcp works fine once xenial or bionic are installed, and the mini.iso manual network configuration works, but the mini.iso dhcp fails. the mini.iso was downloaded last night.

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[gregrwm (gregrwm)]

no surprise the installed bionic uses the same static ip address i gave for the mini.iso to use. same issue on desktop and laptop. for the desktop i expect i can just populate /etc/network/interfaces and uninstall NetworkManager. i don't think that's a good solution for the lappy tho. can anybody clue me to a workaround, to fix/complete my laptop bionic configuration? i think ssb is the broadcom wifi driver module, when running bionic it's already listed in lsmod but only eth0 shows up in the network applet or /sys/class/net, when running trusty the lappy wifi works, APs are listed and it connects to my modem just fine, seems likely i can just copy some missing bit of configuration from the trusty install, but what?

[gregrwm (gregrwm)]

i'm looking for a workaround.

retracing my steps, i try the full iso again, but i guess the fire's gone out of my cdburner:
$ cdrecord bionic-desktop-amd64.iso
wodim: No write mode specified.
wodim: Assuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.
Device was not specified. Trying to find an appropriate drive...
Looking for a DVD-R drive to store 1431.56 MiB...
Detected DVD-R drive: /dev/dvdrw
Using /dev/cdrom of unknown capabilities
Device type : Removable CD-ROM
Version : 5
Response Format: 2
Capabilities :
Vendor_info : 'TSSTcorp'
Identification : 'DVD+-RW TS-L633C'
Revision : 'D300'
Device seems to be: Generic mmc2 DVD-R/DVD-RW.
Using generic SCSI-3/mmc DVD-R(W) driver (mmc_mdvd).
Driver flags : SWABAUDIO BURNFREE
Supported modes: PACKET SAO
Speed set to 11080 KB/s
Starting to write CD/DVD at speed 8.0 in real unknown mode for single session.
Last chance to quit, starting real write in 0 seconds. Operation starts.
Errno: 5 (Input/output error), reserve track scsi sendcmd: no error
CDB: 53 00 00 00 00 00 0B 2F 20 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 72 05 21 04 00 00 00 0E 09 0C 00 00 00 03 00 00
Sense Key: 0x1 Recovered Error, Segment 5
Sense Code: 0x00 Qual 0x03 (setmark detected) Fru 0x0
Sense flags: Blk 67108864 (not valid) illegal block length
cmd finished after 40.725s timeout 40s
wodim: Cannot open new session.
$

well, so, that's what the mini.iso is for, right? as an alternative installation method.

so, but, the bionic mini.iso dhcp fails, tho manual network configuration works, and thus mini.iso installs a static ip configuration. well, on my desktop, i want a dhcp configuration. i figure why not just drop back to the simple way it was done before network manager, so, i uninstalled wpasupplicant, which took network manager out with it:
 Start-Date: 2018-02-20 12:41:02
 Commandline: apt-get --auto-remove purge wpasupplicant
 Purge: network-manager-pptp:amd64 (1.2.4-4), iputils-arping:amd64 (3:20161105-1ubuntu2), pptp-linux:amd64 (1.9.0+ds-2), dnsmasq-base:amd64 (2.78-1), network-manager-gnome:amd64 (1.8.10-2ubuntu1), network-manager :amd64 (1.8.4-1ubuntu4), lubuntu-desktop:amd64 (0.90), lubuntu-gtk-desktop:amd64 (0.90), wpasupplicant:amd64 (2:2.6-15ubuntu1), dns-root-data:amd64 (2018013001)
 End-Date: 2018-02-20 12:41:24

and edited /etc/network/interfaces to contain:
 auto lo
 iface lo inet loopback

 auto enp0s25
 iface enp0s25 inet dhcp

and there's nothing in /etc/udev/rules.d

clearly it still needs something, it boots up like this:
$ ip a
 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
     inet 127.0.0.1/8 scope host lo
        valid_lft forever preferred_lft forever
     inet6 ::1/128 scope host
        valid_lft forever preferred_lft forever
 2: enp0s25: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
     link/ether 00:21:70:32:6a:ee brd ff:ff:ff:ff:ff:ff

and i find these matches for either "eth" or "enp" in /var/log/sys...