Bug 618496

This is unlikely to be related in any way to the acpid.  acpid is disabled when running GNOME.  More likely there's a driver issue.

You're right, gnome works with gnome-power-manager and HAL.

Maybe it's a driver problem, although I have no problem with the graphics. Convinces me more the idea that is related to power management.

I'll pass this error in gnome-power-management.

Thank you.

Hello everyone,
I tried the following:


$ cat  /sys/devices/virtual/backlight/acpi_video0/brightness 
9

$ cat  /sys/devices/virtual/backlight/acpi_video0/brightness 
0

Function keys for brightness control changes the values, but the brightness level does not change.


Some values from lshal:


udi = '/org/freedesktop/Hal/devices/computer'
  info.addons = {'hald-addon-acpi'} (string list)
  info.callouts.add = {'hal-storage-cleanup-all-mountpoints'} (string list)
  info.interfaces = {'org.freedesktop.Hal.Device.SystemPowerManagement'} (string list)
  info.product = 'Computer'  (string)
  info.subsystem = 'unknown'  (string)
  info.udi = '/org/freedesktop/Hal/devices/computer'  (string)
  org.freedesktop.Hal.Device.SystemPowerManagement.method_argnames = {'num_seconds_to_sleep', 'num_seconds_to_sleep', '', '', '', 'enable_power_save'} (string list)
  org.freedesktop.Hal.Device.SystemPowerManagement.method_execpaths = {'hal-system-power-suspend', 'hal-system-power-suspend-hybrid', 'hal-system-power-hibernate', 'hal
-system-power-shutdown', 'hal-system-power-reboot', 'hal-system-power-set-power-save'} (string list)
  org.freedesktop.Hal.Device.SystemPowerManagement.method_names = {'Suspend', 'SuspendHybrid', 'Hibernate', 'Shutdown', 'Reboot', 'SetPowerSave'} (string list)
  org.freedesktop.Hal.Device.SystemPowerManagement.method_signatures = {'i', 'i', '', '', '', 'b'} (string list)
  org.freedesktop.Hal.version = '0.5.14'  (string)
  org.freedesktop.Hal.version.major = 0  (0x0)  (int)
  org.freedesktop.Hal.version.micro = 14  (0xe)  (int)
  org.freedesktop.Hal.version.minor = 5  (0x5)  (int)
  power_management.acpi.linux.version = '20091214'  (string)
  power_management.can_hibernate = true  (bool)
  power_management.can_suspend = true  (bool)
  power_management.can_suspend_hybrid = false  (bool)
  power_management.can_suspend_to_disk = true  (bool)
  power_management.can_suspend_to_ram = true  (bool)
  power_management.is_powersave_set = false  (bool)
  power_management.quirk.dpms_on = true  (bool)
  power_management.quirk.dpms_suspend = true  (bool)
  power_management.quirk.vbe_post = true  (bool)
  power_management.quirk.vbemode_restore = true  (bool)
  power_management.quirk.vbestate_restore = true  (bool)
  power_management.quirk.vga_mode_3 = true  (bool)
  power_management.type = 'acpi'  (string)
  system.board.product = 'Aspire 4741'  (string)
  system.board.serial = 'LXPXH020080150C46E2000'  (string)
  system.board.vendor = 'Acer'  (string)
  system.board.version = 'Rev'  (string)
  system.chassis.manufacturer = 'Acer'  (string)
  system.chassis.type = 'Notebook'  (string)
  system.firmware.release_date = '03/02/2010'  (string)
  system.firmware.vendor = 'Phoenix Technologies LTD'  (string)
  system.firmware.version = 'V1.04'  (string)
  system.formfactor = 'laptop'  (string)
  system.hardware.primary_video.product = 70  (0x46)  (int)
  system.hardware.primary_video.vendor = 32902  (0x8086)  (int)
  system.hardware.product = 'Aspire 4741'  (string)
  system.hardware.serial = 'LXPXH020080150C46E2000'  (string)
  system.hardware.uuid = 'F263F980-4BF3-11DF-9F61-E44173AE8595'  (string)
  system.hardware.vendor = 'Acer'  (string)
  system.hardware.version = 'Rev'  (string)
  system.kernel.machine = 'x86_64'  (string)
  system.kernel.name = 'Linux'  (string)
  system.kernel.version = '2.6.33.6-147.fc13.x86_64'  (string)
  system.kernel.version.major = 2  (0x2)  (int)
  system.kernel.version.micro = 33  (0x21)  (int)
  system.kernel.version.minor = 6  (0x6)  (int)




udi = '/org/freedesktop/Hal/devices/computer_backlight'
  info.addons = {'hald-addon-generic-backlight'} (string list)
  info.capabilities = {'laptop_panel'} (string list)
  info.category = 'laptop_panel'  (string)
  info.interfaces = {'org.freedesktop.Hal.Device.LaptopPanel'} (string list)
  info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
  info.product = 'Generic Backlight Device'  (string)
  info.subsystem = 'backlight'  (string)
  info.udi = '/org/freedesktop/Hal/devices/computer_backlight'  (string)
  laptop_panel.access_method = 'general'  (string)
  laptop_panel.brightness_in_hardware = false  (bool)
  laptop_panel.num_levels = 10  (0xa)  (int)
  linux.hotplug_type = 2  (0x2)  (int)
  linux.subsystem = 'backlight'  (string)
  linux.sysfs_path = '/sys/devices/virtual/backlight/acpi_video0'  (string)

More info...

I have the intel i910 driver, but my video driver is an intel HD graphics

$ lsmod |grep video

uvcvideo               53873  0 
videodev               35123  1 uvcvideo
v4l1_compat            12570  2 uvcvideo,videodev
v4l2_compat_ioctl32     9793  1 videodev
i2c_core               24507  6 videodev,i2c_i801,i915,drm_kms_helper,drm,i2c_algo_bit
video                  20741  1 i915
output                  2117  1 video


$ modinfo video

filename:       /lib/modules/2.6.33.6-147.fc13.x86_64/kernel/drivers/acpi/video.ko
license:        GPL
description:    ACPI Video Driver
author:         Bruno Ducrot
srcversion:     FAF8A980798680EB6026B6B
alias:          acpi*:LNXVIDEO:*
depends:        output
vermagic:       2.6.33.6-147.fc13.x86_64 SMP mod_unload 
parm:           brightness_switch_enabled:bool
parm:           allow_duplicates:bool


$ modinfo i915

filename:       /lib/modules/2.6.33.6-147.fc13.x86_64/kernel/drivers/gpu/drm/i915/i915.ko
license:        GPL and additional rights
description:    Intel Graphics
author:         Tungsten Graphics, Inc.
license:        GPL and additional rights
srcversion:     A152491F8E8FF56466A9E3B
alias:          pci:v00008086d00000106sv*sd*bc03sc00i*
alias:          pci:v00008086d00000102sv*sd*bc03sc00i*
alias:          pci:v00008086d00000046sv*sd*bc03sc00i*
alias:          pci:v00008086d00000042sv*sd*bc03sc00i*
alias:          pci:v00008086d0000A011sv*sd*bc03sc00i*
alias:          pci:v00008086d0000A001sv*sd*bc03sc00i*
alias:          pci:v00008086d00002E42sv*sd*bc03sc00i*
alias:          pci:v00008086d00002E32sv*sd*bc03sc00i*
alias:          pci:v00008086d00002E22sv*sd*bc03sc00i*
alias:          pci:v00008086d00002E12sv*sd*bc03sc00i*
alias:          pci:v00008086d00002E02sv*sd*bc03sc00i*
alias:          pci:v00008086d00002A42sv*sd*bc03sc00i*
alias:          pci:v00008086d00002A12sv*sd*bc03sc00i*
alias:          pci:v00008086d00002A02sv*sd*bc03sc00i*
alias:          pci:v00008086d000029D2sv*sd*bc03sc00i*
alias:          pci:v00008086d000029C2sv*sd*bc03sc00i*
alias:          pci:v00008086d000029B2sv*sd*bc03sc00i*
alias:          pci:v00008086d000029A2sv*sd*bc03sc00i*
alias:          pci:v00008086d00002992sv*sd*bc03sc00i*
alias:          pci:v00008086d00002982sv*sd*bc03sc00i*
alias:          pci:v00008086d00002972sv*sd*bc03sc00i*
alias:          pci:v00008086d000027AEsv*sd*bc03sc00i*
alias:          pci:v00008086d000027A2sv*sd*bc03sc00i*
alias:          pci:v00008086d00002772sv*sd*bc03sc00i*
alias:          pci:v00008086d00002592sv*sd*bc03sc00i*
alias:          pci:v00008086d0000258Asv*sd*bc03sc00i*
alias:          pci:v00008086d00002582sv*sd*bc03sc00i*
alias:          pci:v00008086d00002572sv*sd*bc03sc00i*
alias:          pci:v00008086d0000358Esv*sd*bc03sc00i*
alias:          pci:v00008086d00003582sv*sd*bc03sc00i*
alias:          pci:v00008086d00002562sv*sd*bc03sc00i*
alias:          pci:v00008086d00003577sv*sd*bc03sc00i*
depends:        drm,drm_kms_helper,i2c-core,video,i2c-algo-bit
vermagic:       2.6.33.6-147.fc13.x86_64 SMP mod_unload 
parm:           modeset:int
parm:           fbpercrtc:int
parm:           powersave:int
parm:           lvds_downclock:int

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