[Bug 1551078] Re: CDROM installation fails for ubuntu 14.04.3 if another CDROM of ubuntu version is attached to same system

[Steve Langasek]

The information in the bug is clear. However, it is unlikely that this
bug will be resolved for 16.04.  This is a function of the ISO detection
that has been in place in Ubuntu since its inception; the nature of the
image build process means there is no 100% reliable way to determine
which CD is the "right" one, so the heuristics used can fail in the
manner you describe if more than one Ubuntu CD is present on the system
at install time.

I think the obvious workaround, which seems to have sufficed for
everyone up to now, is to not leave multiple CDs in the system when
installing. So I do not agree with the proposed "critical" severity.

** Changed in: debian-installer (Ubuntu)
   Importance: Undecided => Low

** Changed in: debian-installer (Ubuntu)
       Status: New => Triaged

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Title:
  CDROM installation fails for ubuntu 14.04.3 if another CDROM of ubuntu
  version is attached to same system

Status in debian-installer package in Ubuntu:
  Triaged

Bug description:
  == Comment: #0 - NAVEED A. UPPINANGADY SALIH <naveedaus at in.ibm.com> - 2016-02-24 09:23:59 ==
  ---Problem Description---
  Two or more different versions (for example 14.04.3 and 15.04) of Ubuntu DVD/CDROM is attached to any Power system then installation fails after language selection as installer tries to mount other Ubuntu DVD/CDROM which is not supposed to happen and throws below error.

  
     ???????????????? [!!] Load installer components from CD ?????????????????
     ?                                                                       ?
     ? No kernel modules were found. This probably is due to a mismatch      ?
     ? between the kernel used by this version of the installer and the      ?
     ? kernel version available in the archive.                              ?
     ?                                                                       ?
     ? If you're installing from a mirror, you can work around this problem  ?
     ? by choosing to install a different version of Ubuntu. The install     ?
     ? will probably fail to work if you continue without kernel modules.    ?
     ?                                                                       ?
     ? Continue the install without loading kernel modules?                  ?
     ?                                                                       ?
     ?     <Go Back>                                       <Yes>    <No>     ?
     ?                                                                       ?
     ?????????????????????????????????????????????????????????????????????????

  note: we used virtual dvd function from vios to attach two different versions of Ubuntu to our lpar.
  I think this issue will even occur with two or more physical dvd with different ubuntu version <-- but we have not verified this

   
  ---uname output---
  3.19.0-25-generic
   
  Machine Type = 9119-MME 
   
  Contact Information = naveedaus at in.ibm.com 
   
  ---boot type---
  CDROM / ISO image
   
  ---Install repository type---
  CDROM
   
  ---Point of failure---
  Failed while accessing install media

  == Comment: #5 - NAVEED A. UPPINANGADY SALIH <naveedaus at in.ibm.com> -
  2016-02-25 01:56:35 ==

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