Public bug reported:
Binary package hint: gnome-power-manager
In my experience, it does not seem to be possible to get g-p-m to use
battery percent remaining, rather than battery time remaining, as the
metric determining the current power state.
Steps to reproduce:
1. open gconf-editor
2. navigate to /apps/gnome-power-manager
3. uncheck key "use_time_for_policy" to switch to using battery percentage,
rather than time, as the metric.
4. set key "battery_percentage_action" to value "99", which should ensure that
an action is taken once the battery is <= 99%
5. set key "action_battery_critical" to value "suspend", to suspend the machine
once the battery is <= 99%
6. unplug your laptop. The machine should suspend within a few minutes, when
the battery percentage drops from 100% to 99%.
7. observe as the laptop does not suspend.
If my source-diving is correct, this is due to a line in
gpm_warning_get_state() in gpm-warning.c, line 102:
we initialize policy to warning->priv->use_time, which equals 0, since we want
to use percent.
Then, we compare policy to GPM_WARNING_TIME, and since policy == 0 ==
GPM_WARNING_TIME,
we go into the body of the if statement, and begin checking
status->remaining_time : clearly wrong.
90 /* get from gconf */
91 if (policy == GPM_WARNING_AUTO) {
92 policy = warning->priv->use_time;
93 }
94
95 /* this is a CSR mouse */
96 if (status->design_charge == 7) {
--- SNIP ---
102 } else if (policy == GPM_WARNING_TIME) {
103 if (status->remaining_time <= 0) {
104 type = GPM_WARNING_NONE;
105 } else if (status->remaining_time <= warning->priv->action_time) {
106 type = GPM_WARNING_ACTION;
107 } else if (status->remaining_time <= warning->priv->critical_time) {
108 type = GPM_WARNING_CRITICAL;
109 } else if (status->remaining_time <= warning->priv->very_low_time) {
110 type = GPM_WARNING_VERY_LOW;
111 } else if (status->remaining_time <= warning->priv->low_time) {
112 type = GPM_WARNING_LOW;
113 }
114 } else {
115 if (status->percentage_charge <= 0) {
I don't know the Gnome style conventions, but I think that the most
readable fix would be to change
policy = warning->priv->use_time;
to
if ( warning->priv->use_time )
policy = GPM_WARNING_TIME;
else
policy = GPM_WARNING_PERCENTAGE;
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: Unconfirmed
** Tags: action battery percentage time
--
g-p-m does not allow using battery percentage for policy in feisty
https://bugs.launchpad.net/bugs/113244
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