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Thread: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

  1. #1
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    Default Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    Hi all,
    Basically I cannot control the brightness. I have exhausted all avenues. Researched google, gone to ubuntu forum and this forum as well. Power Management does not have any control related to Brightness. Installed Compiz and still cannot control brightness. The screen is running at full brightness and it's hurting my eyes.

    Please see the output of various commands:

    root@bt:~# uname -a
    Code:
    Linux bt 3.2.6 #1 SMP Fri Feb 17 10:34:20 EST 2012 x86_64 GNU/Linux
    root@bt:~# lspci -nn | grep VGA
    Code:
    01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M93 [Mobility Radeon HD 4300/4500 Series] [1002:9555]
    root@bt:~# lsmod
    Code:
    Module                  Size  Used by
    ums_realtek            17850  0 
    usb_storage            55911  1 ums_realtek
    uas                    17756  0 
    rfcomm                 46309  4 
    bnep                   17999  2 
    radeon                813181  3 
    ttm                    68384  1 radeon
    drm_kms_helper         40041  1 radeon
    drm                   225891  6 radeon,ttm,drm_kms_helper
    i2c_algo_bit           13156  1 radeon
    dm_crypt               22668  0 
    arc4                   12529  2 
    ath9k                 134009  0 
    mac80211              478885  1 ath9k
    ath9k_common           13604  1 ath9k
    ath9k_hw              401846  2 ath9k,ath9k_common
    hp_accel               25976  0 
    btusb                  18371  2 
    snd_hda_codec_hdmi     31994  1 
    lp                     17789  0 
    snd_hda_codec_idt      69962  1 
    lis3lv02d              19401  1 hp_accel
    ath                    22992  3 ath9k,ath9k_common,ath9k_hw
    intel_ips              17943  0 
    parport                44368  1 lp
    psmouse                72820  0 
    cfg80211              190023  3 ath9k,mac80211,ath
    snd_hda_intel          33175  0 
    snd_hda_codec         110336  3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
    snd_hwdep              13554  1 snd_hda_codec
    snd_seq_midi           13324  0 
    snd_pcm                92879  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_rawmidi            29179  1 snd_seq_midi
    mei                    40623  0 
    snd_seq_midi_event     14436  1 snd_seq_midi
    uvcvideo               67221  0 
    snd_seq                60549  2 snd_seq_midi,snd_seq_midi_event
    snd_timer              28838  2 snd_pcm,snd_seq
    snd_seq_device         14129  3 snd_seq_midi,snd_rawmidi,snd_seq
    snd                    64384  10 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    videodev               93508  1 uvcvideo
    v4l2_compat_ioctl32    20896  1 videodev
    serio_raw              13211  0 
    soundcore              12598  1 snd
    bluetooth             166564  23 rfcomm,bnep,btusb
    snd_page_alloc         18101  2 snd_hda_intel,snd_pcm
    hp_wmi                 18048  0 
    joydev                 17457  0 
    input_polldev          13646  1 lis3lv02d
    sparse_keymap          13526  1 hp_wmi
    dm_mirror              21906  0 
    dm_region_hash         19667  1 dm_mirror
    dm_log                 18215  2 dm_mirror,dm_region_hash
    usbhid                 46275  0 
    hid                    97618  1 usbhid
    r8169                  56455  0 
    wmi                    18697  1 hp_wmi
    video                  18858  0
    root@bt:~# glxinfo
    Code:
    name of display: :0.0
    display: :0  screen: 0
    direct rendering: No (LIBGL_ALWAYS_INDIRECT set)
    server glx vendor string: SGI
    server glx version string: 1.2
    server glx extensions:
        GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, 
        GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, 
        GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGIS_multisample, 
        GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
    client glx vendor string: Mesa Project and SGI
    client glx version string: 1.4
    client glx extensions:
        GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, 
        GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory, 
        GLX_MESA_copy_sub_buffer, GLX_MESA_swap_control, 
        GLX_MESA_swap_frame_usage, GLX_OML_swap_method, GLX_OML_sync_control, 
        GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, 
        GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
        GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap
    GLX version: 1.2
    GLX extensions:
        GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, 
        GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, 
        GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGIS_multisample, 
        GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, 
        GLX_EXT_texture_from_pixmap
    OpenGL vendor string: Advanced Micro Devices, Inc.
    OpenGL renderer string: Mesa DRI R600 (RV710 9555) 20090101  TCL
    OpenGL version string: 1.4 (1.5 Mesa 7.7.1)
    OpenGL extensions:
        GL_ARB_depth_texture, GL_ARB_draw_buffers, GL_ARB_fragment_program, 
        GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture, 
        GL_ARB_occlusion_query, GL_ARB_point_parameters, GL_ARB_shadow, 
        GL_ARB_shadow_ambient, GL_ARB_texture_border_clamp, 
        GL_ARB_texture_compression, GL_ARB_texture_cube_map, 
        GL_ARB_texture_env_add, GL_ARB_texture_env_combine, 
        GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, 
        GL_ARB_texture_mirrored_repeat, GL_ARB_texture_rectangle, 
        GL_ARB_transpose_matrix, GL_ARB_vertex_program, GL_ARB_window_pos, 
        GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, 
        GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate, 
        GL_EXT_blend_logic_op, GL_EXT_blend_minmax, GL_EXT_blend_subtract, 
        GL_EXT_copy_texture, GL_EXT_draw_range_elements, GL_EXT_fog_coord, 
        GL_EXT_multi_draw_arrays, GL_EXT_packed_pixels, GL_EXT_point_parameters, 
        GL_EXT_polygon_offset, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
        GL_EXT_separate_specular_color, GL_EXT_shadow_funcs, 
        GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_subtexture, 
        GL_EXT_texture, GL_EXT_texture3D, GL_EXT_texture_edge_clamp, 
        GL_EXT_texture_env_add, GL_EXT_texture_env_combine, 
        GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic, 
        GL_EXT_texture_lod_bias, GL_EXT_texture_mirror_clamp, 
        GL_EXT_texture_object, GL_EXT_texture_rectangle, GL_EXT_vertex_array, 
        GL_APPLE_packed_pixels, GL_ATI_draw_buffers, GL_ATI_texture_env_combine3, 
        GL_ATI_texture_mirror_once, GL_ATIX_texture_env_combine3, 
        GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate, 
        GL_MESA_pack_invert, GL_MESA_ycbcr_texture, GL_NV_blend_square, 
        GL_NV_depth_clamp, GL_NV_light_max_exponent, GL_NV_texgen_reflection, 
        GL_NV_texture_rectangle, GL_NV_vertex_program, GL_SGI_color_matrix, 
        GL_SGI_color_table, GL_SGIS_generate_mipmap, GL_SGIS_texture_border_clamp, 
        GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, GL_SGIX_shadow_ambient, 
        GL_SUN_multi_draw_arrays
    -------------truncated--------------------
    root@bt:~# ls -l /usr/lib/xorg/modules/drivers
    Code:
    total 5164
    -rw-r--r-- 1 root root  135848 2009-12-08 15:38 apm_drv.so
    -rw-r--r-- 1 root root   23368 2009-12-08 15:41 ark_drv.so
    -rw-r--r-- 1 root root   10392 2010-04-17 20:16 ati_drv.so
    -rw-r--r-- 1 root root   10488 2010-04-26 19:49 ch7017.so
    -rw-r--r-- 1 root root   10568 2010-04-26 19:49 ch7xxx.so
    -rw-r--r-- 1 root root  148312 2009-12-08 14:19 chips_drv.so
    -rw-r--r-- 1 root root   39888 2009-12-08 15:44 cirrus_alpine.so
    -rw-r--r-- 1 root root   15168 2009-12-08 15:44 cirrus_drv.so
    -rw-r--r-- 1 root root   31984 2009-12-08 15:44 cirrus_laguna.so
    -rw-r--r-- 1 root root   23560 2010-04-02 07:13 fbdev_drv.so
    -rw-r--r-- 1 root root   60616 2009-12-08 14:22 i128_drv.so
    -rw-r--r-- 1 root root   49344 2009-12-08 14:32 i740_drv.so
    -rw-r--r-- 1 root root  683040 2010-04-26 19:49 intel_drv.so
    -rw-r--r-- 1 root root   10488 2010-04-26 19:49 ivch.so
    -rw-r--r-- 1 root root  195264 2009-12-08 14:35 mach64_drv.so
    -rw-r--r-- 1 root root  177920 2010-03-31 16:01 mga_drv.so
    -rw-r--r-- 1 root root   74760 2010-03-23 09:35 neomagic_drv.so
    -rw-r--r-- 1 root root  198688 2010-04-02 07:17 nouveau_drv.so
    -rw-r--r-- 1 root root  206760 2010-01-08 05:21 nv_drv.so
    -rw-r--r-- 1 root root  355592 2011-06-07 06:01 openchrome_drv.so
    -rw-r--r-- 1 root root  112720 2010-04-12 08:28 r128_drv.so
    -rw-r--r-- 1 root root 1079896 2010-04-17 20:16 radeon_drv.so
    -rw-r--r-- 1 root root   39992 2009-12-08 14:40 rendition_drv.so
    -rw-r--r-- 1 root root   65872 2009-12-08 14:44 s3_drv.so
    -rw-r--r-- 1 root root   78016 2009-12-08 14:45 s3virge_drv.so
    -rw-r--r-- 1 root root  149128 2009-12-08 15:55 savage_drv.so
    -rw-r--r-- 1 root root   10488 2010-04-26 19:49 sil164.so
    -rw-r--r-- 1 root root  124592 2009-12-08 14:53 siliconmotion_drv.so
    -rw-r--r-- 1 root root  579976 2010-03-26 19:57 sis_drv.so
    -rw-r--r-- 1 root root   77160 2009-12-08 14:59 sisusb_drv.so
    -rw-r--r-- 1 root root   74136 2009-12-08 15:03 tdfx_drv.so
    -rw-r--r-- 1 root root   10488 2010-04-26 19:49 tfp410.so
    -rw-r--r-- 1 root root  166872 2009-12-08 15:04 trident_drv.so
    -rw-r--r-- 1 root root   56424 2009-12-08 15:10 tseng_drv.so
    -rw-r--r-- 1 root root   19016 2009-12-08 15:12 v4l_drv.so
    -rw-r--r-- 1 root root   27688 2010-03-25 12:19 vesa_drv.so
    -rw-r--r-- 1 root root   52856 2010-03-23 11:03 vmware_drv.so
    -rw-r--r-- 1 root root   31648 2009-12-08 15:18 voodoo_drv.so
    thanks a lot..
    Great Forum..

  2. #2
    Just burned his ISO
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    Default Re: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    I am having the same problem though I haven't had much time to try and fix it.

    Lenovo Y570 with GT555m (optimus)

    It was working fine with Backtrack r1 64-gnome but when I did a clean wipe->r2 64-gnome I had this problem as well. I too would appreciate any solutions other people may have figured out.

  3. #3
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    Default Re: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    hi guys...I now have done a clean install of Backtrack 5 R2.. everything is working fine am still having this issue of no being able to control the brightness of my laptop screen..
    please someone guide me a solution for this problem..am I also trawling through ubuntu forums as well..

  4. #4
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    Default Re: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    A bit more info..if this helps to sort out this issue please:
    I ran following commands and output are as followss

    root@bt:~# ls /sys/class/backlight
    acpi_video0

    root@bt:~# lsmod | grep video
    uvcvideo 67221 0
    videodev 93508 1 uvcvideo
    v4l2_compat_ioctl32 20896 1 videodev
    video 18858 0

    root@bt:~# cat /proc/cmdline
    BOOT_IMAGE=/boot/vmlinuz-3.2.6 root=UUID=087eacdb-87c5-4c4a-9cc9-4521a44231a1 ro text splash vga=791

  5. #5
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    Default Re : Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    Hello!

    Open a terminal and try the following:

    Code:
    # lspci
    You'll get the list of your hardware.
    Take note of the number in front of VGA adapter (on my computer, it's 00:02.0)

    Then, type the following:
    Code:
    # setpci -s xx:xx.x F4.B=xx
    
    Where xx:xx.x = device number and xx = brightness in hexa (00 to FF)
    For me, I set the following:
    # setpci -s 00:02.0 F4.B=E0
    It should work....

  6. #6
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    Default Re: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    Hi Sil3nc3r many thanks for your advice..

    Here commands output as suggested:

    Code:
    root@bt:~# lspci | grep "VGA"
    01:00.0 VGA compatible controller: ATI Technologies Inc M93 [Mobility Radeon HD 4300/4500 Series]
    Then I have tried various levels of brightness with the following commands:

    Code:
    root@bt:~# setpci -s 01:00.0 F4.B=0A
    root@bt:~# setpci -s 01:00.0 F4.B=00
    root@bt:~# setpci -s 01:00.0 F4.B=E0
    However the brightness in my laptop LCD remains changed..

    On the same issue I have installed f.lux from here:
    http://stereopsis.com/flux/linux.html

    I can see the f.lux applet however I cannot change the color temperature. When I go to preference of this applet and choose a color temperature and then press Preview, the screen changes color momentarily and then goes back to full brightness again. I wonder if this is to do with GNOME shell as Backtrack runs GNOME 2.30.2 where as the latest version of GNOME is 3.2.

    Any thanks a lot for trying to help however it is still not working. I still cannot control the brightness of the screen of my laptop.

  7. #7
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    Default Re: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    Ok I got it sorted somehow.. this is what I have done..
    I have gone into this folder..
    /sys/class/backlight/acpi_video0/

    Then run this command:
    root@bt:~# nano brightness

    Shows my brightness value as 24 (which is the brightest). Here one can directly change this number. Lower means lesser brightness.

    Anyway this command in the terminal will do the same job as well:

    root@bt:~# echo $12 > /sys/class/backlight/acpi_video0/brightness

    the above command changes my brightness to 2 from 24. Now I do not know what is the correlation here. Anyway would like to know other ways to control the screen brightness. Thanks to all.

    You also can edit the file brightness directly with command..
    nano brightness

    My values are from 0 - 24..where 0 is the least brightness to 24 which is the highest.
    Last edited by hannah; 03-09-2012 at 06:17 PM. Reason: To add more instruction

  8. #8
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    Default Re: Cannot control Brighness : fn + f2/f3 does not work : HP ProBook 4520s

    Ok Now solved..
    This is what I have done. I have installed ubuntu-tweak with this method:
    Please note that you need to install the Lucid version (which is the commands do anyway)

    add-apt-repository ppa:tualatrix/ppa
    apt-get update
    apt-get install ubuntu-tweak

    After doing this I can control the brightness of the screen with fn+f2/f3 keys. Perfect. You can also go to System -> Preferences -> Power Mangement. You will now have a Display menu here.

    Thanks to all.

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