Well, on a tangent, you must be hitting the fallback code -- I'm surprised you're not using BACKLIGHT. Does xbacklight return any data for your display? What machine and graphics is this?

As for the failure of GetBrightness, I can't reproduce, but do you also get the warning if you try to change the brightness using the keys with SetBrightness in gdm, or is it just GetBrightness?

xbacklight reports 100.00.
this is a T61 with 965 graphics

Same error shows up here in gdm, also when I try to SetBrightness with keys:

Oct  6 08:08:09 victoria dbus: Rejected send message, 1 matched rules; type="method_call", sender=":1.152" (uid=42 pid=3382 comm="gnome-power-manager) interface="org.freedesktop.Hal.Device.LaptopPanel" member="GetBrightness" error name="(unset)" requested_reply=0 destination=":1.1" (uid=0 pid=1221 comm="hald))
Oct  6 08:08:09 victoria dbus: Rejected send message, 1 matched rules; type="method_call", sender=":1.152" (uid=42 pid=3382 comm="gnome-power-manager) interface="org.freedesktop.Hal.Device.LaptopPanel" member="SetBrightness" error name="(unset)" requested_reply=0 destination=":1.1" (uid=0 pid=1221 comm="hald))

This is a Dell XPS M1330 with Nvidia 8400M GS video.

Still getting this with the 2.9.0 intel driver, too.

[root@rikkilap log]# cat /etc/fedora-release 
Fedora release 12 (Constantine)

[root@rikkilap log]# uname -a
Linux rikkilap 2.6.31.5-127.fc12.i686 #1 SMP Sat Nov 7 21:41:45 EST 2009 i686 i686 i386 GNU/Linux

and....

Nov 21 23:05:32 localhost dbus: Rejected send message, 1 matched rules; type="method_call", sender=":1.24" (uid=42 pid=1599 comm="gnome-power-manager) interface="org.freedesktop.Hal.Device.LaptopPanel" member="SetBrightness" error name="(unset)" requested_reply=0 destination=":1.1" (uid=0 pid=1194 comm="hald))
Nov 21 23:11:21 localhost dbus: Rejected send message, 1 matched rules; type="method_call", sender=":1.79" (uid=42 pid=2756 comm="gnome-power-manager) interface="org.freedesktop.Hal.Device.LaptopPanel" member="GetBrightness" error name="(unset)" requested_reply=0 destination=":1.1" (uid=0 pid=1194 comm="hald))

SetBrightness and GetBrightness

I have my laptop docked and the primary display is very dark but the second display is OK.  NVidia card. HP nw9440 laptop.

http://www.smolts.org/client/show/pub_923ec415-c78c-442a-8fec-664179a75906


[ra@rikkilap Documents]$ xbacklight -get
No outputs have backlight property

[ra@rikkilap Documents]$ xgamma 
-> Red  1.000, Green  1.000, Blue  1.000

I see this is against Rawhide.   Can we change that to Fedora 12 ?

In dmesg I get:

[Firmware Bug]: ACPI: ACPI brightness control misses _BQC function
[Firmware Bug]: ACPI: ACPI brightness control misses _BQC function

Richard Allen, your problem is possibly something else - this message (and bug)  is just about within the login screen.

Richard Hughes, I have an Nvidia card (using the binary drivers). xdpyinfo doesn't show the BACKLIGHT extension (and |xbacklight -get| tells me "No outputs have backlight property". The brightness soft-keys on my laptop work fine when I'm logged in, but at the login screen I get the errors for GetBrightness and SetBrightness - one of each at the login screen, and then another set (both Get and SetBrightness) whenever I try to use the softkeys to change the brightness up or down)

Created attachment 377442 [details]
/var/log/messages

Seeing the same problem when attempting to start gdm on my macbook pro running Fedora 12 (updated to latest updates repo).

SMOLT: http://www.smolts.org/client/show/pub_a45bca46-400c-4444-a607-e0e9283eaff4

Dec 10 07:22:31 localhost dbus: Rejected send message, 1 matched rules; type="method_call", sender=":1.27" (uid=42 pid=1796 comm="gnome-power-manager) interface="org.freedesktop.Hal.Device.LaptopPanel" member="SetBrightness" error name="(unset)" requested_reply=0 destination=":1.1" (uid=0 pid=1346 comm="hald))
Dec 10 07:22:41 localhost dbus: Rejected send message, 1 matched rules; type="method_call", sender=":1.27" (uid=42 pid=1796 comm="gnome-power-manager) interface="org.freedesktop.Hal.Device.LaptopPanel" member="SetBrightness" error name="(unset)" requested_reply=0 destination=":1.1" (uid=0 pid=1346 comm="hald))

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