Description of problem:

Back light on the MSI Wind N011 netbook blinks indefinitely if power cord is pluged in or unpluged. Or user tries to change screen brightness using function keys.

Version-Release number of selected component (if applicable):

kernel-2.6.32.11-99.fc12.i686
kernel-2.6.32.12-115.fc12.i686
kernel-2.6.32.14-127.fc12.i686

acpid-1.0.10-2.fc12.i686

How reproducible:

Always

Steps to Reproduce:

Plug or unplug power cord or change screen brightness using function keys. Also can happen if netbook is left for some time. I suppose when the screen saver is activated.
  
Actual results:

The screen will blink indefinitely changing the brightness from 0% to 100% and back.

Expected results:

ACPI screen brightness changes should work flawlessly. User should be able to change the screen brithness using function keys.

Additional info:

It was normal under FC8 on the same netbook.

Netbook: MSI Wind N011

# lspci 
00:00.0 Host bridge: Intel Corporation Mobile 945GME Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
02:00.0 Network controller: RaLink RT2860

# lsmod 
Module                  Size  Used by
ipt_MASQUERADE          1776  1 
iptable_nat             4647  1 
nf_nat                 15785  2 ipt_MASQUERADE,iptable_nat
bridge                 39353  0 
stp                     1399  1 bridge
llc                     3671  2 bridge,stp
sunrpc                160120  1 
cpufreq_ondemand        6993  2 
acpi_cpufreq            6535  0 
xt_physdev              1395  1 
ip6t_REJECT             3394  2 
nf_conntrack_ipv6      14859  5 
ip6table_filter         2227  1 
ip6_tables              9409  1 ip6table_filter
ipv6                  223810  34 ip6t_REJECT,nf_conntrack_ipv6
fuse                   48375  4 
dm_multipath           12324  0 
uinput                  5244  0 
snd_hda_codec_realtek   197456  1 
snd_hda_intel          19915  3 
snd_hda_codec          59921  2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep               4868  1 snd_hda_codec
snd_seq                42811  0 
uvcvideo               47540  0 
videodev               28423  1 uvcvideo
snd_seq_device          5031  1 snd_seq
v4l1_compat            11370  2 uvcvideo,videodev
i2c_i801                8369  0 
joydev                  7408  0 
snd_pcm                60772  2 snd_hda_intel,snd_hda_codec
iTCO_wdt                8886  0 
wmi                     5620  0 
iTCO_vendor_support     2023  1 iTCO_wdt
r8169                  29597  0 
snd_timer              15541  2 snd_seq,snd_pcm
snd                    46576  14 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer
soundcore               4863  1 snd
mii                     3510  1 r8169
snd_page_alloc          6061  2 snd_hda_intel,snd_pcm
rt2860sta             646233  1 
usb_storage            34386  0 
i915                  240588  2 
drm_kms_helper         22263  1 i915
drm                   134881  3 i915,drm_kms_helper
i2c_algo_bit            4073  1 i915
i2c_core               21780  6 videodev,i2c_i801,i915,drm_kms_helper,drm,i2c_algo_bit
video                  16522  1 i915
output                  1605  1 video

# lscpu 
Architecture:          i686
CPU(s):                2
Thread(s) per core:    2
Core(s) per socket:    1
CPU socket(s):         1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 28
Stepping:              2
CPU MHz:               800.000
L1d cache:             24K
L1i cache:             32K
L2 cache:              512K

# xwininfo -root

xwininfo: Window id: 0x101 (the root window) (has no name)

  Absolute upper-left X:  0
  Absolute upper-left Y:  0
  Relative upper-left X:  0
  Relative upper-left Y:  0
  Width: 1024
  Height: 600
  Depth: 24
  Visual: 0x21
  Visual Class: TrueColor
  Border width: 0
  Class: InputOutput
  Colormap: 0x20 (installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +0+0  -0+0  -0-0  +0-0
  -geometry 1024x600+0+0