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Problem Description
========================
 Tried installing ubuntu16.04 using netboot method and it fails with error 'Illegal instruction'

>  Tried installing ubuntu16.04 using netboot method - yupg1 guest.
>  Added DHCP entry in KTE for the yupg1 guest.
>  Able to select Langauage and Location from installer menu.
>  It prompts for 'configure network window' as below


   ??????????????????????? [!] Configure the network ???????????????????????
   ?                                                                       ?
   ? Please enter the hostname for this system.                            ?
   ?                                                                       ?
   ? The hostname is a single word that identifies your system to the      ?
   ? network. If you don't know what your hostname should be, consult your ?
   ? network administrator. If you are setting up your own home network,   ?
   ? you can make something up here.                                       ?
   ?                                                                       ?
   ? Hostname:                                                             ?
   ?                                                                       ?
   ? yupg1________________________________________________________________ ?
   ?                                                                       ?
   ?     <Go Back>                                          <Continue>     ?
   ?                                                                       ?
   ?????????????????????????????????????????????????????????????????????????


> After selecting continue button, it thows message as 'Illegal instruction'

Illegal instruction

> Unable to proceed further and it continously throws above message

Host Details:
---------------
  KVM BUILD LEVEL:                       GA3 SP1 build 55

== Comment: #8 - Vaishnavi Bhat <vaish123@xxxxxxxxxx> -  ==
When I started the installation and reached the point to enter the hostname, the installation hanged with 'Illegal instruction'. At this point I could not collect any debug logs. I tried installation with multipath enabled and could reach a point where I could collect the debug logs. I did not see ''Illegal instruction' on my console this time but it was recorded in the logs. 

Mar  8 16:40:09 main-menu[209]: DEBUG: resolver (libc6-udeb): package doesn't exist (ignored)
Mar  8 16:40:09 main-menu[209]: INFO: Menu item 'network-preseed' selected
Mar  8 16:40:09 kernel: [   43.752359] wget[1357]: unhandled signal 4 at 000000003159de5c nip 000000003159de5c lr 000000003159de48 code 30001
Mar  8 16:40:09 kernel: [   43.754753] wget[1362]: unhandled signal 4 at 00000000369fde5c nip 00000000369fde5c lr 00000000369fde48 code 30001
Mar  8 16:40:16 main-menu[209]: (process:1340): expr: warning: '^.*\[[:a-fA-F0-9]*\]': using '^' as the first character
Mar  8 16:40:16 main-menu[209]: (process:1340): of a basic regular expression is not portable; it is ignored
Mar  8 16:40:16 main-menu[209]: (process:1340): Illegal instruction
Mar  8 16:40:16 main-menu[209]: (process:1340): Illegal instruction
Mar  8 16:40:16 main-menu[209]: WARNING **: Configuring 'network-preseed' failed with error code 1
Mar  8 16:40:16 main-menu[209]: WARNING **: Menu item 'network-preseed' failed.
Mar  8 16:40:20 main-menu[209]: INFO: Modifying debconf priority limit from 'high' to 'medium'
Mar  8 16:40:20 debconf: Setting debconf/priority to medium
Mar  8 16:40:20 main-menu[209]: DEBUG: resolver (libc6-udeb): package doesn't exist (ignored)
Mar  8 16:40:28 main-menu[209]: INFO: Menu item 'di-utils-shell' selected
Mar  8 16:41:56 main-menu[209]: DEBUG: resolver (libc6-udeb): package doesn't exist (ignored)
Mar  8 16:42:08 main-menu[209]: INFO: Menu item 'save-logs' selected

== Comment: #9 - INDIRA P. JOGA <indira.priya@xxxxxxxxxx> -  ==
Hi,

I am able to recreate the issue on 2 different host machines with 2
different networks

Raykvm - Travis3En network on host
Yupkvm - Austin network on host.

Tried installing ubunu16.04 using netboot on both kvm hosts and it
failed with same error 'Illegal Instruction"

Regards,
Indira

== Comment: #10 - Richard M. Scheller <rschelle@xxxxxxxxxx> -  ==
I was able to get to a shell in the installer so that I could look for broken binaries that might cause a SIGILL.  I found that /usr/bin/wget is incorrectly linked as a shared object instead of an executable.

I verified from the installer command line that "wget" does, in fact,
die with SIGILL:

/usr/bin # ./wget
Illegal instruction
/usr/bin #

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bot-comment bugnameltc-138308 severity-critical targetmilestone-inin---
-- 
Ubuntu16.04 netboot installation fails with illegal instruction error
https://bugs.launchpad.net/bugs/1555264
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