Hello, now it is possible for me to control the brightness via "System
Settings" -> Brightness and lock" -> "Brightness" slider!

But the fn button still not work (except once a time with the kernel
parameter "acpi_osi=" until to the next reboot).

Since Autum it works over die Brightness slider, but i don't no why...
maybe due to the newer nvidia driver (331.38 -> 331.113)...


 % uname -a

Linux G75VX 3.13.0-40-generic #69-Ubuntu SMP Thu Nov 13 17:53:56 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux


% sudo lspci -v| sed -ne '/NVIDIA/,/^$/ { p; }'

01:00.0 VGA compatible controller: NVIDIA Corporation GK104M [GeForce GTX 
670MX] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. Device 21ab
        Flags: bus master, fast devsel, latency 0, IRQ 46
        Memory at f4000000 (32-bit, non-prefetchable) [size=16M]
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Memory at d0000000 (64-bit, prefetchable) [size=32M]
        I/O ports at e000 [size=128]
        [virtual] Expansion ROM at f5000000 [disabled] [size=512K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Endpoint, MSI 00
        Capabilities: [b4] Vendor Specific Information: Len=14 <?>
        Capabilities: [100] Virtual Channel
        Capabilities: [128] Power Budgeting <?>
        Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 
<?>
        Kernel driver in use: nvidia

01:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev a1)
        Subsystem: ASUSTeK Computer Inc. Device 2116
        Flags: bus master, fast devsel, latency 0, IRQ 17
        Memory at f5080000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: [60] Power Management version 3
        Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [78] Express Endpoint, MSI 00
        Kernel driver in use: snd_hda_intel


% lspci -v | perl -ne '/VGA/../^$/ and /VGA|Kern/ and print' 

01:00.0 VGA compatible controller: NVIDIA Corporation GK104M [GeForce GTX 
670MX] (rev a1) (prog-if 00 [VGA controller])
        Kernel driver in use: nvidia


% dpkg --status nvidia-331 | grep Version

Version: 331.113-0ubuntu0.0.4


%   dpkg -l nvidia* 

ii  nvidia-331     331.113-0ubu amd64        NVIDIA binary driver - version 33
ii  nvidia-331-uvm 331.113-0ubu amd64        NVIDIA Unified Memory kernel modu
un  nvidia-common  <keine>      <keine>      (keine Beschreibung vorhanden)
un  nvidia-driver- <keine>      <keine>      (keine Beschreibung vorhanden)
ii  nvidia-libopen 331.113-0ubu amd64        NVIDIA OpenCL Driver and ICD Load
ii  nvidia-opencl- 331.113-0ubu amd64        NVIDIA OpenCL ICD
un  nvidia-persist <keine>      <keine>      (keine Beschreibung vorhanden)
ii  nvidia-prime   0.6.2        amd64        Tools to enable NVIDIA's Prime
ii  nvidia-setting 331.20-0ubun amd64        Tool for configuring the NVIDIA g
un  nvidia-setting <keine>      <keine>      (keine Beschreibung vorhanden)
un  nvidia-vdpau-d <keine>      <keine>      (keine Beschreibung vorhanden)

Kind regards,

patrice

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https://bugs.launchpad.net/bugs/1263498

Title:
  Asus G75VX, can not modify brightness

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