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[Ricardo Salveti <rsalveti@xxxxxxxxxxxx>]

Public bug reported:

current build number: 169
device name: mako
channel: ubuntu-touch/devel-proposed
alias: ubuntu-touch/vivid-proposed
last update: 2015-04-12 20:38:14
version version: 169
version ubuntu: 20150412
version device: 20150210
version custom: 20150412

This causes a bad side effect when changing volume via indicator-sound,
as that will cause a sync to accountsservice in order to sync the
volume. Once that sync happens, it will request the user properties, and
in case the user doesn't have a valid language at
/var/lib/AccountsService/users/<user>, it will always rely on the
fallback, which would be fine if calculating the fallback wasn't 't so
cpu or i/o intensive (and that happens multiple times).

As a test, just flash latest vivid image on mako, don't set any language
when the wizard shows up, run top and then change the volume by pressing
volume up/down. This is what I see with mako:

 PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
2609 phablet   20   0  499660 121220  52688 S   7.6  6.5   0:41.69 unity8
5600 phablet   20   0    3676   1760   1288 R   6.0  0.1   0:00.19 language-option
1312 root      20   0  211532  15572  11344 S   1.9  0.8   0:07.25 unity-system-co
1316 phablet   20   0   36532   3792   2928 S   1.3  0.2   0:01.66 accounts-daemon

And the reason why:
src/user.c
...
static void
user_get_property (GObject    *object,
                   guint       param_id,
                   GValue     *value,
                   GParamSpec *pspec)
{
        User *user = USER (object);
...
        case PROP_LANGUAGE:
                if (user->language)
                        g_value_set_string (value, user->language);
                else 
                        g_value_set_string (value, user_get_fallback_value (user, "Language"));
                break;
        case PROP_FORMATS_LOCALE:
                if (user->formats_locale)
                        g_value_set_string (value, user->formats_locale);
                else 
                        g_value_set_string (value, user_get_fallback_value (user, "FormatsLocale"));
                break;

user_set_property never gets called unless the user changes the system
language from system-settings or wizard.

Once you change the language, it will set a valid language at
/var/lib/AccountsService/users/<user>, causing this behavior to stop.

Another bad side effect of this issue is that it takes quite a while for
accountsservice to reply back to indicator-sound when the sync happens,
possibly causing sync aborts (as indicator-sound only waits 1 second
before triggering another sync).

Some possible ways to fix this issue:
1) Make wizard to set language even when the selected language is already the default one;
2) Change accountsservice to save the fallback value at the first time it gets that from the system;

** Affects: canonical-devices-system-image
     Importance: Undecided
         Status: New

** Affects: accountsservice (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: unity8 (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: unity8 (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: canonical-devices-system-image
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1443178

Title:
  Accounts Service always relies on language fallback if never set by
  the user

Status in the base for Ubuntu mobile products:
  New
Status in accountsservice package in Ubuntu:
  New
Status in unity8 package in Ubuntu:
  New

Bug description:
  current build number: 169
  device name: mako
  channel: ubuntu-touch/devel-proposed
  alias: ubuntu-touch/vivid-proposed
  last update: 2015-04-12 20:38:14
  version version: 169
  version ubuntu: 20150412
  version device: 20150210
  version custom: 20150412

  This causes a bad side effect when changing volume via indicator-
  sound, as that will cause a sync to accountsservice in order to sync
  the volume. Once that sync happens, it will request the user
  properties, and in case the user doesn't have a valid language at
  /var/lib/AccountsService/users/<user>, it will always rely on the
  fallback, which would be fine if calculating the fallback wasn't 't so
  cpu or i/o intensive (and that happens multiple times).

  As a test, just flash latest vivid image on mako, don't set any
  language when the wizard shows up, run top and then change the volume
  by pressing volume up/down. This is what I see with mako:

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
  2609 phablet   20   0  499660 121220  52688 S   7.6  6.5   0:41.69 unity8
  5600 phablet   20   0    3676   1760   1288 R   6.0  0.1   0:00.19 language-option
  1312 root      20   0  211532  15572  11344 S   1.9  0.8   0:07.25 unity-system-co
  1316 phablet   20   0   36532   3792   2928 S   1.3  0.2   0:01.66 accounts-daemon

  And the reason why:
  src/user.c
  ...
  static void
  user_get_property (GObject    *object,
                     guint       param_id,
                     GValue     *value,
                     GParamSpec *pspec)
  {
          User *user = USER (object);
  ...
          case PROP_LANGUAGE:
                  if (user->language)
                          g_value_set_string (value, user->language);
                  else 
                          g_value_set_string (value, user_get_fallback_value (user, "Language"));
                  break;
          case PROP_FORMATS_LOCALE:
                  if (user->formats_locale)
                          g_value_set_string (value, user->formats_locale);
                  else 
                          g_value_set_string (value, user_get_fallback_value (user, "FormatsLocale"));
                  break;

  user_set_property never gets called unless the user changes the system
  language from system-settings or wizard.

  Once you change the language, it will set a valid language at
  /var/lib/AccountsService/users/<user>, causing this behavior to stop.

  Another bad side effect of this issue is that it takes quite a while
  for accountsservice to reply back to indicator-sound when the sync
  happens, possibly causing sync aborts (as indicator-sound only waits 1
  second before triggering another sync).

  Some possible ways to fix this issue:
  1) Make wizard to set language even when the selected language is already the default one;
  2) Change accountsservice to save the fallback value at the first time it gets that from the system;

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