Public bug reported:
This used to work well in the past, but on edgy it doesn't work anymore.
I failed to notice before because I usually prefer to keep 100% of the
brightness also when running on battery.
(May be a HAL issue, not sure)
1) From gnome-power-prefs, set brigthness on battery to 50%
2) detach power cord
expected:
screen is dimmed
result:
nothing happens
I digget in it a tiny bit and the proper script
/usr/share/hal/scripts/hal-system-lcd-set-brightness gets called.
I made the script do the following:
echo "$HAL_PROP_LAPTOP_PANEL_ACCESS_METHOD" >> /home/paolo/acpihasrun
echo "$HAL_PROP_LAPTOP_PANEL_NUM_LEVELS" >> /home/paolo/acpihasrun
echo "$HAL_PROP_LINUX_ACPI_PATH" >> /home/paolo/acpihasrun
...
# read value for set brightness
read value
echo ${value} >> /home/paolo/acpihasrun
and the result is:
sony
8
/proc/acpi/sony/brightness
7
sony
8
/proc/acpi/sony/brightness
6
sony
8
/proc/acpi/sony/brightness
5
sony
8
/proc/acpi/sony/brightness
4
sony
8
/proc/acpi/sony/brightness
3
sony
8
/proc/acpi/sony/brightness
2
sony
8
/proc/acpi/sony/brightness
1
which looks rather weird and leads to no effects
** Affects: hal (Ubuntu)
Importance: Medium
Status: Confirmed
--
doesn't dim screen on SONY VAIO (vgn FS215M / Z1 RMP) (regression)
https://launchpad.net/bugs/65028
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