https://bugzilla.kernel.org/show_bug.cgi?id=15627
Summary: ACPI brightness bug no FN F7 F8 brightness control, no
keycode of 4 keys and start up with a dim brightness
Product: ACPI
Version: 2.5
Kernel Version: 2.6.31.20
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Created an attachment (id=25699)
--> (https://bugzilla.kernel.org/attachment.cgi?id=25699)
bugs detailed info
00oo00 wrote 16 hours ago: #2
Hello, I have a problem with my Samsung notebook.
My Function Keys (Fn) that manage the brightness level are bios-controlled,
because they work before Linux boot (in grub and in bios for example).
The problem is that they don't work after the boot. The only way to change the
screen brightness is doing echo n>/proc/acpi/video/GFX0/DD03/brightness (where
n is the desired brightness level).
I can't assign any function to the brightness fn keys (I think that's because
they're bios controlled).
I tried 4 keystrokes doesn`t return keycodes. They`re FN+F7 FN+F8 FN+F9 FN+F10
I did dmesg|tail -5 command and it returns this below.
[ 80.440431] ata4.00: status: { DRDY ERR }
[ 133.093263] ACPI: Please implement acpi_video_bus_ROM_seq_show
[ 133.250579] ACPI: Please implement acpi_video_bus_ROM_seq_show
[ 134.123082] ACPI: Please implement acpi_video_bus_ROM_seq_show
[ 1333.281087] CE: hpet increasing min_delta_ns to 15000 nsec
when cat '/proc/acpi/video/GFX0/DD03/brightness it returns some values.
levels: 13 25 38 50 63 75 88 100
current: 63
Brightness control not working with FN +F7(BRTN UP) FN+F8(BRTN DOWN). Tried
different versions not working as well. I think this is a bug. And run into
tty1 tried to get the two keycode but return nothing.
ProblemType: Bug
Architecture: i386
Date: Wed Mar 24 13:11:16 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: wl
Package: gnome-power-manager 2.28.1-0ubuntu1.3
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: gnome-power-manager
Uname: Linux 2.6.31-20-generic i686
XsessionErrors:
(gnome-settings-daemon:1715): GLib-CRITICAL **: g_propagate_error: assertion
`src != NULL' failed
(gnome-settings-daemon:1715): GLib-CRITICAL **: g_propagate_error: assertion
`src != NULL' failed
(nautilus:1822): Eel-CRITICAL **: eel_preferences_get_boolean: assertion
`preferences_is_initialized ()' failed
(polkit-gnome-authentication-agent-1:1854): GLib-CRITICAL **:
g_once_init_leave: assertion `initialization_value != 0' failed
(firefox:1959): GLib-WARNING **: g_set_prgname() called multiple times
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