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
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