Red Hat Bugzilla – Bug 702515
nv_backlight (from nouveau) not working
Last modified: 2012-08-16 09:50:02 EDT
Description of problem:
hitting the brightness keys in gnome causes the popop to appear, and the slider goes back and forth, but nothing changes. Upon investigation it seems the right values are getting set to /sys/class/backlight/nv_backlight , but they are having no effect.
Version-Release number of selected component (if applicable):
01:00.0 VGA compatible controller: nVidia Corporation G94 [GeForce 9800M GS] (rev a1)
ASUS G50vt notebook.
Steps to Reproduce:
1. Boot up.
2. Hit brightness key
Brightness should change
Brightness does not change.
This laptop also exposes the brightness via acpi, ie /sys/class/backlight/acpi_video0, and adjusting the values there works. However, there's no way to tell nouveau to not export the brightness control, nor is there a way to get gnome-power-manager to use a different backlight device.
This used to work fine before nouveau got backlight support. This is functionally a regression.
(In reply to comment #1)
> This used to work fine before nouveau got backlight support. This is
> functionally a regression.
A regression since when? Fedora 13?
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