[Bug 1800719] Re: missing conf files noted on apt upgrade after distribution upgrade

[sr9000]

Same symptoms like Jerzy Luszawski @dr-agon wrote, except my links
pointing on:

/etc/ld.so.conf.d/i386-linux-gnu_GL.conf -> /etc/alternatives/i386-linux-gnu_gl_conf
/etc/ld.so.conf.d/x86_64-linux-gnu_EGL.conf -> /etc/alternatives/x86_64-linux-gnu_egl_conf
/etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf -> /etc/alternatives/x86_64-linux-gnu_gl_conf

alternatives are also symlinks, pointing to real files
/etc/alternatives/i386-linux-gnu_gl_conf -> /usr/lib/i386-linux-gnu/mesa/ld.so.conf
/etc/alternatives/x86_64-linux-gnu_egl_conf -> /usr/lib/x86_64-linux-gnu/mesa-egl/ld.so.conf
/etc/alternatives/x86_64-linux-gnu_gl_conf -> /usr/lib/x86_64-linux-gnu/mesa/ld.so.conf

When I copied real files into /etc/ld.so.conf.d/ the problem is gone.
`update-initramfs -u` didn't write any waning anymore.

Update-initramfs seems to have problems with symlinks (why?).

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https://bugs.launchpad.net/bugs/1800719

Title:
  missing conf files noted on apt upgrade after distribution upgrade

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  Since upgrading from 17.10 to 18.04, the following errors occur during
  routine apt upgrade:

  /sbin/ldconfig.real: Warning: ignoring configuration file that cannot be opened: /etc/ld.so.conf.d/i386-linux-gnu_EGL.conf: No such file or directory
  /sbin/ldconfig.real: Warning: ignoring configuration file that cannot be opened: /etc/ld.so.conf.d/i386-linux-gnu_GL.conf: No such file or directory

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.27
  ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18
  Uname: Linux 4.15.0-38-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Oct 30 16:26:01 2018
  InstallationDate: Installed on 2018-03-07 (237 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to bionic on 2018-08-02 (89 days ago)
  VarLogDistupgradeTermlog:

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