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Binary package hint: hal
I file this bug against hal as this is probably where it will end up
anyway.
After loading the fujitsu-laptop module (which creates a backlight
interface under /sys/class/backlight/fujitsu-laptop), gpm believes it
can handle backlight settings. However, the handling is very weird as
setting backlight to 100 might result in 50% brightness, 30, results in
100% and so on.
I thought this might be related to the fact that the xbacklight tool
wasn't working properly, so after a suggestion from the xorg mailing
list I patched the intel driver so that it would be aware of the
fujitsu-laptop interface. After this, xbacklight works perfectly fine
(much better than gpm/hal worked), but gpm/hal stopped handling
backlight alltogether. That is, gpm still believes it can handle the
backlight (as hal finds the interface, I presume), but changing it
results in nothing.
For the record, the patch against the intel driver is this:
diff -Naur xserver-xorg-video-intel-2.2.1/src/i830_lvds.c
xserver-xorg-video-intel-2.2.1-new/src/i830_lvds.c
--- xserver-xorg-video-intel-2.2.1/src/i830_lvds.c 2008-02-20
22:41:25.000000000 +0100
+++ xserver-xorg-video-intel-2.2.1-new/src/i830_lvds.c 2008-03-01
11:37:09.000000000 +0100
@@ -68,6 +68,7 @@
"thinkpad_screen",
"acpi_video1",
"acpi_video0",
+ "fujitsu-laptop",
NULL,
};
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
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gnome-power-manager does not handle backlight properly on fujitsu platforms
https://bugs.launchpad.net/bugs/197253
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Bugs, which is subscribed to gnome-power-manager in ubuntu.
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