Here are :
- a hald fdi policy script
(/usr/share/hal/fdi/policy/20thirdparty/10-laptop-panel-mgmt-policy.fdi) which :
* modifies the hal "laptop_panel.num_levels" property provided by buggy acpi
to replace it with 21 (the correct value for my computer)
* changes the laptop_panel.access_method not to interfere with the others
sony systems.
These modifications are applied only for Sony CorporationVGN-S5M_S.
- patches for hal-system-lcd-{get,set}-brightness-linux (hal
0.5.8.1-4ubuntu1)
With these, all works fine on my computer using gnome-power-manager.
** Attachment added: "hal fdi policy"
http://librarian.launchpad.net/5579378/10-laptop-panel-mgmt-policy.fdi
--
LCD brightness setting doesn't work with Sony Vaio VGN-S5M
https://launchpad.net/bugs/77739
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