Comment 4 for bug 137598

Here is the trace from gnome-power-manager when the brightness changes to maximum on idle...

gpm_screensaver_powersave_idle_changed] gpm-screensaver.c:102 (23:12:51): emitting powersave-idle-changed : (1)
[powersave_idle_changed_cb] gpm-idle.c:335 (23:12:51): Received GS powesave idle changed: 1
[gpm_idle_set_mode] gpm-idle.c:98 (23:12:51): Doing a state transition: 1
[gpm_backlight_notify_system_idle_changed] gpm-backlight.c:581 (23:12:51): we were active for 73.247393s
[gpm_backlight_notify_system_idle_changed] gpm-backlight.c:584 (23:12:51): changing powersave idle status to 1
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:374 (23:12:51): 1. main brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:387 (23:12:51): 2. battery scale 1.000000, brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:402 (23:12:51): 3. idle scale 1.000000, brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:422 (23:12:51): 4. ambient scale 1.000000, brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:440 (23:12:51): emitting brightness-changed : 100
[gpm_brightness_lcd_dim_hw] gpm-brightness-lcd.c:267 (23:12:51): new_level_hw=117
[gpm_brightness_lcd_dim_hw_step] gpm-brightness-lcd.c:198 (23:12:51): new_level_hw=117, last_set_hw=17
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 17 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 22 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 27 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 32 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 37 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 42 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 47 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 52 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 57 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 62 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 67 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 72 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 77 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 82 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 87 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 92 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 97 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 102 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 107 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 112 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_brightness_lcd_set_hw] gpm-brightness-lcd.c:155 (23:12:51): Setting 117 of 117

(gnome-power-manager:16993): GLib-GObject-CRITICAL **: g_value_set_int: assertion `G_VALUE_HOLDS_INT (value)' failed
[gpm_info_event_log] gpm-info.c:591 (23:12:51): Adding 2 to the event log
[gpm_screensaver_powersave_idle_changed] gpm-screensaver.c:102 (23:12:58): emitting powersave-idle-changed : (0)
[powersave_idle_changed_cb] gpm-idle.c:335 (23:12:58): Received GS powesave idle changed: 0
[gpm_idle_set_mode] gpm-idle.c:98 (23:12:58): Doing a state transition: 0
[gpm_backlight_notify_system_idle_changed] gpm-backlight.c:553 (23:12:58): we have just been idle for 7.301470s
[gpm_backlight_notify_system_idle_changed] gpm-backlight.c:564 (23:12:58): increasing idle dim time to 60s
[gpm_backlight_notify_system_idle_changed] gpm-backlight.c:584 (23:12:58): changing powersave idle status to 0
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:374 (23:12:58): 1. main brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:387 (23:12:58): 2. battery scale 1.000000, brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:402 (23:12:58): 3. idle scale 1.000000, brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:422 (23:12:58): 4. ambient scale 1.000000, brightness 1.000000
[gpm_backlight_brightness_evaluate_and_set] gpm-backlight.c:430 (23:12:58): values are the same, no action
[gpm_backlight_sync_policy] gpm-backlight.c:158 (23:12:58): choosing sensible default
[gpm_backlight_sync_policy] gpm-backlight.c:160 (23:12:58): laptop, so use GPM_DPMS_METHOD_OFF
[gpm_backlight_sync_policy] gpm-backlight.c:192 (23:12:58): BACKLIGHT parameters 0 0 1800, method '4'
[x11_sync_server_dpms_settings] gpm-dpms.c:130 (23:12:58): Syncing DPMS settings enabled=1 timeouts=0 0 0
[idle_changed_cb] gpm-manager.c:778 (23:12:58): Idle state changed: NORMAL
[gpm_info_event_log] gpm-info.c:591 (23:12:58): Adding 4 to the event log
[gconf_key_changed_cb] gpm-conf.c:332 (23:12:58): emitting value-changed : '/apps/gnome-screensaver/power_management_delay'
[gconf_key_changed_cb] gpm-screensaver.c:181 (23:12:58): key : /apps/gnome-screensaver/power_management_delay
[hal_device_property_modified_cb] gpm-cell.c:249 (23:12:59): udi=/org/freedesktop/Hal/devices/acpi_BAT0, key=battery.charge_level.current, added=0, removed=0, finally=0
[hal_device_property_modified_cb] gpm-cell.c:249 (23:12:59): udi=/org/freedesktop/Hal/devices/acpi_BAT0, key=battery.voltage.current, added=0, removed=0, finally=0
[hal_device_property_modified_cb] gpm-cell.c:249 (23:12:59): udi=/org/freedesktop/Hal/devices/acpi_BAT0, key=battery.reporting.current, added=0, removed=0, finally=1