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: 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: 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/syslog: *Feb 20 12:44:30 op755 kernel: [ 2.106086] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 00:21:70:32:6a:ee *Feb 20 12:44:30 op755 kernel: [ 2.106146] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection *Feb 20 12:44:30 op755 kernel: [ 2.106207] e1000e 0000:00:19.0 eth0: MAC: 7, PHY: 6, PBA No: 1041FF-0FF *Feb 20 12:44:30 op755 kernel: [ 2.107682] e1000e 0000:00:19.0 enp0s25: renamed from eth0 *Feb 20 12:44:30 op755 kernel: [ 27.061742] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 *Feb 20 12:45:18 op755 ureadahead[231]: ureadahead:enp0s25: Ignored relative path *Feb 20 12:45:18 op755 ureadahead[231]: ureadahead:enp0s25: Ignored relative path *Feb 20 12:45:18 op755 ureadahead[231]: ureadahead:enp0s25: Ignored relative path *Feb 20 12:57:33 op755 kernel: [ 2.150044] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 00:21:70:32:6a:ee *Feb 20 12:57:33 op755 kernel: [ 2.150078] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection *Feb 20 12:57:33 op755 kernel: [ 2.150125] e1000e 0000:00:19.0 eth0: MAC: 7, PHY: 6, PBA No: 1041FF-0FF *Feb 20 12:57:33 op755 kernel: [ 2.150968] e1000e 0000:00:19.0 enp0s25: renamed from eth0 *Feb 20 12:57:33 op755 kernel: [ 17.469721] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 my xenial install does have network manager, and still works fine: $ ip a 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 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: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:21:70:32:6a:ee brd ff:ff:ff:ff:ff:ff inet 192.168.0.42/24 brd 192.168.0.255 scope global dynamic enp0s25 valid_lft 581511sec preferred_lft 581511sec inet6 fe80::221:70ff:fe32:6aee/64 scope link valid_lft forever preferred_lft forever and i find these matches for either "eth" or "enp" in /var/log/syslog: /x/var/log/syslog:Feb 22 05:43:47 op755 kernel: [ 1.870094] e1000e 0000:00:19.0 eth0: (PCI Express:2.5GT/s:Width x1) 00:21:70:32:6a:ee /x/var/log/syslog:Feb 22 05:43:47 op755 kernel: [ 1.870154] e1000e 0000:00:19.0 eth0: Intel(R) PRO/1000 Network Connection /x/var/log/syslog:Feb 22 05:43:47 op755 kernel: [ 1.870217] e1000e 0000:00:19.0 eth0: MAC: 7, PHY: 6, PBA No: 1041FF-0FF /x/var/log/syslog:Feb 22 05:43:47 op755 kernel: [ 1.871606] e1000e 0000:00:19.0 enp0s25: renamed from eth0 /x/var/log/syslog:Feb 22 05:43:53 op755 kernel: [ 37.579393] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 /x/var/log/syslog:Feb 22 05:44:01 op755 NetworkManager[740]: [1519299841.7604] devices added (path: /sys/devices/pci0000:00/0000:00:19.0/net/enp0s25, iface: enp0s25) /x/var/log/syslog:Feb 22 05:44:01 op755 NetworkManager[740]: [1519299841.7604] device added (path: /sys/devices/pci0000:00/0000:00:19.0/net/enp0s25, iface: enp0s25): no ifupdown configuration found. /x/var/log/syslog:Feb 22 05:44:01 op755 NetworkManager[740]: [1519299841.8553] Loaded device plugin: NMVethFactory (internal) /x/var/log/syslog:Feb 22 05:44:01 op755 NetworkManager[740]: [1519299841.8555] Loaded device plugin: NMEthernetFactory (internal) /x/var/log/syslog:Feb 22 05:44:03 op755 NetworkManager[740]: [1519299843.2271] manager: (enp0s25): new Ethernet device (/org/freedesktop/NetworkManager/Devices/0) /x/var/log/syslog:Feb 22 05:44:03 op755 NetworkManager[740]: [1519299843.2286] device (enp0s25): state change: unmanaged -> unavailable (reason 'managed') [10 20 2] /x/var/log/syslog:Feb 22 05:44:03 op755 kernel: [ 46.913832] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready /x/var/log/syslog:Feb 22 05:44:03 op755 kernel: [ 47.380135] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.7203] device (enp0s25): link connected /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.7206] device (enp0s25): state change: unavailable -> disconnected (reason 'carrier-changed') [20 30 40] /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.7223] device (enp0s25): Activation: starting connection 'Wired connection 1' (bd12b809-b1dd-4fa7-92b6-4d840187d333) /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.7225] device (enp0s25): state change: disconnected -> prepare (reason 'none') [30 40 0] /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.7230] device (enp0s25): state change: prepare -> config (reason 'none') [40 50 0] /x/var/log/syslog:Feb 22 05:44:06 op755 kernel: [ 50.404855] e1000e: enp0s25 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx /x/var/log/syslog:Feb 22 05:44:06 op755 kernel: [ 50.404990] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.7237] device (enp0s25): state change: config -> ip-config (reason 'none') [50 70 0] /x/var/log/syslog:Feb 22 05:44:06 op755 NetworkManager[740]: [1519299846.8199] dhcp4 (enp0s25): activation: beginning transaction (timeout in 45 seconds) /x/var/log/syslog:Feb 22 05:44:07 op755 NetworkManager[740]: [1519299847.3646] dhcp4 (enp0s25): dhclient started with pid 874 /x/var/log/syslog:Feb 22 05:44:08 op755 dhclient[874]: DHCPREQUEST of 192.168.0.42 on enp0s25 to 255.255.255.255 port 67 (xid=0x2e6ceb5f) /x/var/log/syslog:Feb 22 05:44:08 op755 avahi-daemon[744]: Joining mDNS multicast group on interface enp0s25.IPv4 with address 192.168.0.42. /x/var/log/syslog:Feb 22 05:44:08 op755 avahi-daemon[744]: New relevant interface enp0s25.IPv4 for mDNS. /x/var/log/syslog:Feb 22 05:44:08 op755 avahi-daemon[744]: Registering new address record for 192.168.0.42 on enp0s25.IPv4. /x/var/log/syslog:Feb 22 05:44:08 op755 NetworkManager[740]: [1519299848.6363] dhcp4 (enp0s25): state changed unknown -> bound /x/var/log/syslog:Feb 22 05:44:08 op755 NetworkManager[740]: [1519299848.6374] device (enp0s25): state change: ip-config -> ip-check (reason 'none') [70 80 0] /x/var/log/syslog:Feb 22 05:44:08 op755 NetworkManager[740]: [1519299848.6380] device (enp0s25): state change: ip-check -> secondaries (reason 'none') [80 90 0] /x/var/log/syslog:Feb 22 05:44:08 op755 NetworkManager[740]: [1519299848.6383] device (enp0s25): state change: secondaries -> activated (reason 'none') [90 100 0] /x/var/log/syslog:Feb 22 05:44:08 op755 avahi-daemon[744]: Joining mDNS multicast group on interface enp0s25.IPv6 with address fe80::221:70ff:fe32:6aee. /x/var/log/syslog:Feb 22 05:44:08 op755 avahi-daemon[744]: New relevant interface enp0s25.IPv6 for mDNS. /x/var/log/syslog:Feb 22 05:44:08 op755 avahi-daemon[744]: Registering new address record for fe80::221:70ff:fe32:6aee on enp0s25.*. /x/var/log/syslog:Feb 22 05:44:08 op755 NetworkManager[740]: [1519299848.8838] policy: set 'Wired connection 1' (enp0s25) as default for IPv4 routing and DNS /x/var/log/syslog:Feb 22 05:44:08 op755 NetworkManager[740]: [1519299848.9063] device (enp0s25): Activation: successful, device activated. /x/var/log/syslog:Feb 22 05:44:08 op755 nm-dispatcher: req:2 'up' [enp0s25]: new request (1 scripts) /x/var/log/syslog:Feb 22 05:44:08 op755 nm-dispatcher: req:2 'up' [enp0s25]: start running ordered scripts... /x/var/log/syslog:Feb 22 05:44:09 op755 dnsmasq[889]: using nameserver 8.8.8.8#53(via enp0s25) /x/var/log/syslog:Feb 22 05:44:09 op755 dnsmasq[889]: using nameserver 8.8.4.4#53(via enp0s25) /x/var/log/syslog:Feb 22 05:44:12 op755 ntpd[1065]: Listen normally on 3 enp0s25 192.168.0.42:123 /x/var/log/syslog:Feb 22 05:44:12 op755 ntpd[1065]: Listen normally on 5 enp0s25 [fe80::221:70ff:fe32:6aee%2]:123 /x/var/log/syslog:Feb 22 05:44:14 op755 ntpd[1065]: DNS timeserver.uleth.ca -> 142.66.33.101 should bionic be able to work without network manager? what do i have to do to get it working?