Sebastian : could you post here the result of the command "lshal".
Laurent : I think that commenting out the exit line, will be necessary for some
VAIO model, because the laptop_panel is partially detected as a sony's panel
("linux.sysfs_path"). And thus, it uses it's behaviour ( the "echo" way and
then exit)
For example, my lshal laptop_panel part is :
udi = '/org/freedesktop/Hal/devices/computer_backlight'
info.capabilities = {'laptop_panel'} (string list)
info.category = 'laptop_panel' (string)
info.interfaces = {'org.freedesktop.Hal.Device.LaptopPanel'} (string list)
info.parent = '/org/freedesktop/Hal/devices/computer' (string)
info.product = 'Generic Backlight Device' (string)
info.udi = '/org/freedesktop/Hal/devices/computer_backlight' (string)
laptop_panel.access_method = 'general' (string)
laptop_panel.num_levels = 8 (0x8) (int)
linux.hotplug_type = 2 (0x2) (int)
linux.subsystem = 'backlight' (string)
linux.sysfs_path = '/sys/class/backlight/sony' (string)
org.freedesktop.Hal.Device.LaptopPanel.method_argnames = {'brightness_value',
''} (string list)
org.freedesktop.Hal.Device.LaptopPanel.method_execpaths =
{'hal-system-lcd-set-brightness', 'hal-system-lcd-get-brightness'} (string list)
org.freedesktop.Hal.Device.LaptopPanel.method_names = {'SetBrightness',
'GetBrightness'} (string list)
org.freedesktop.Hal.Device.LaptopPanel.method_signatures = {'i', ''} (string
list)
If we comment or delete the "exits", no harm will be done since you have the
same command in the end of the files...(I admit, it's not a clean).
So deleting the "exits" seems to me the best way to just make more things works
(because i absolutely don't how to change the detection of the "sysfs" path ).
--
LCD brightness setting doesn't work with Sony Vaio VGN-S5M
https://bugs.launchpad.net/bugs/77739
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