[Bug 1752362] [NEW] garbled recovery mode in Simplified Chinese language OS install

[Eric Desrochers]

Public bug reported:

[Impact]

The menu is garbled in recovery mode when using CJK font in Linux
console.

[Test Case]

1. Install Ubuntu with selected Simplified Chinese language.
2. Boot to recovery mode.
3. Most character won't be seen and appear in a square shape. 
(See "Bug attachment" for a screenshot)

[Regression Potential]

Regression risk is low. The fix simply default the system variables to
something the console can output when detecting a blacklisted LANG in
lib/recovery-mode/l10n.sh.

+           export LANG=C.UTF-8
+           export LANGUAGE=en

[Other Info]

Old LP reference :
https://bugs.launchpad.net/bugs/573502

** Affects: friendly-recovery (Ubuntu)
     Importance: Medium
     Assignee: Eric Desrochers (slashd)
         Status: In Progress

** Affects: friendly-recovery (Ubuntu Trusty)
     Importance: Undecided
         Status: New

** Affects: friendly-recovery (Ubuntu Xenial)
     Importance: Undecided
         Status: Confirmed

** Affects: friendly-recovery (Ubuntu Artful)
     Importance: Undecided
         Status: Confirmed

** Affects: friendly-recovery (Ubuntu Bionic)
     Importance: Medium
     Assignee: Eric Desrochers (slashd)
         Status: In Progress


** Tags: sts

** Also affects: friendly-recovery (Ubuntu Artful)
   Importance: Undecided
       Status: New

** Also affects: friendly-recovery (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: friendly-recovery (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Tags added: sts

** Description changed:

  [Impact]
  
  The menu is garbled in recovery mode when using CJK font in Linux
  console.
  
  [Test Case]
  
- 1. Install Ubuntu with selected Simplified Chinese language. 
- 2. Boot to recovery mode. 
+ 1. Install Ubuntu with selected Simplified Chinese language.
+ 2. Boot to recovery mode.
+ 3. Most character won't be seen and appear in a square shape.
  
  [Regression Potential]
  
  Regression risk is low. The fix simply default the system variables to
  something the console can output when detecting a blacklisted LANG in
  lib/recovery-mode/l10n.sh.
  
  +           export LANG=C.UTF-8
  +           export LANGUAGE=en
  
  [Other Info]
-  
+ 
  Old LP reference :
  https://bugs.launchpad.net/bugs/573502

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https://bugs.launchpad.net/bugs/1752362

Title:
  garbled recovery mode in Simplified Chinese language OS install

Status in friendly-recovery package in Ubuntu:
  In Progress
Status in friendly-recovery source package in Trusty:
  New
Status in friendly-recovery source package in Xenial:
  Confirmed
Status in friendly-recovery source package in Artful:
  Confirmed
Status in friendly-recovery source package in Bionic:
  In Progress

Bug description:
  [Impact]

  The menu is garbled in recovery mode when using CJK font in Linux
  console.

  [Test Case]

  1. Install Ubuntu with selected Simplified Chinese language.
  2. Boot to recovery mode.
  3. Most character won't be seen and appear in a square shape. 
  (See "Bug attachment" for a screenshot)

  [Regression Potential]

  Regression risk is low. The fix simply default the system variables to
  something the console can output when detecting a blacklisted LANG in
  lib/recovery-mode/l10n.sh.

  +           export LANG=C.UTF-8
  +           export LANGUAGE=en

  [Other Info]

  Old LP reference :
  https://bugs.launchpad.net/bugs/573502

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