[Bug 1525841] Re: xubuntu and lubuntu (maybe other flavors?) don't display plymouth text theme on live

[Didier Roche]

Note: there is no "color" issue in the text theme. Despite what xubuntu
upstream says, the color in text detail plymouth theme is black as
intended (and was already in previous xubuntu releases)

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Title:
  xubuntu and lubuntu (maybe other flavors?) don't display plymouth text
  theme on live

Status in plymouth package in Ubuntu:
  New

Bug description:
  Here are some observation since the move to plymouth 1.2:
  1. All is fine for the plymouth-theme-ubuntu-*:
    1.1 On real hardware, the logo theme is displayed
    1.2 On vm (qemu/virtualbox), the background is aubergine and the ubuntu-text theme is displayed (with square dots)

  2. For flavors themes:
   1.1 On real hardware, their logo theme is displayed as expected, with the correct background color
   1.2 on vm:
     1.2.1 on the live image, their text themes (not details, only black text as a traditional console outputs) is displayed. The vga16fb driver isn't loaded, on the live session, but that may be the issue (no vga16fb support in new plymouth)?
     1.2.2 after installing (without any network connection), the text theme is displayed (square dots). However, the background is black and not the distro's theme color.

  Note that the files are where we are expecting them to be. The plymouth-theme-xubuntu-text has the same file than previous cycle:
  http://packages.ubuntu.com/wily/all/plymouth-theme-xubuntu-text/filelist
  http://packages.ubuntu.com/xenial/all/plymouth-theme-xubuntu-text/filelist
  which is loading the ubuntu-text module (the ubuntu-text theme is installed on the live, and so, contain the module as for case 1.2 which is working)
  [Plymouth Theme]
  Name=Xubuntu Text
  Description=Text mode theme based on xubuntu-logo theme
  ModuleName=ubuntu-text

  [ubuntu-text]
  title=Xubuntu 15.10
  black=0x000000
  white=0xffffff
  brown=0x000000
  blue=0xffffff

  The colors also present, under the same stenza. (The interesting part
  is that the ubuntu-text module loads successfully after iso install,
  but ignore the colors which can be a keyfile matching issue).

  Finally, note that on the live session, running sudo plymouth show-
  splash shows the xubuntu detail plugin as expected!

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