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Old 11-13-2007, 10:26 PM   #1
redjokerx
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Registered: Aug 2004
Location: San Diego
Distribution: Slackware
Posts: 303

Rep: Reputation: 31
Question xset dpms force on lowers my backlight


This hasn't happened before, but for some reason, when I run
Code:
xset dpms force on
the backlight on my x41 tablet goes to its lowest state.

I first noticed it when my backlight was set to lowest after coming back from a blank screen.

xorg.conf
Code:
Section "ServerLayout"
        Identifier     "X.org Configured"
        Screen      0  "Screen0" 0 0
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
        # vvv thinkwiki.org vvv
        InputDevice    "cursor" "SendCoreEvents"
        InputDevice    "stylus" "SendCoreEvents"
        # ^^^ thinkwiki.org ^^^
EndSection

Section "Files"
        RgbPath      "/usr/share/X11/rgb"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/TTF"
        FontPath     "/usr/share/fonts/OTF"
        FontPath     "/usr/share/fonts/Type1"
        FontPath     "/usr/share/fonts/misc"
        FontPath     "/usr/share/fonts/75dpi/:unscaled"
EndSection

Section "Module"
        Load  "extmod"
        Load  "dbe"
        Load  "record"
        Load  "glx"
        Load  "dri"
        Load  "GLcore"
        Load  "xtrap"
        Load  "freetype"
        Load  "type1"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option       "XkbModel"  "pc104"
        Option       "XkbLayout"  "us"
EndSection

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mice"
        Option      "EmulateWheel" "true"
        Option      "EmulateWheelButton" "2"
        Option      "Emulate3Button" "true"
        Option      "XAxisMapping" "6 7"
        Option      "YAxisMapping" "4 5"
        Option      "ZAxisMapping" "6 7"
EndSection

# from thinkwiki.org

Section "InputDevice"
     Driver        "wacom"
     Identifier    "cursor"
     Option        "Device"        "/dev/ttyS0"
     Option        "Type"          "cursor"
     Option        "ForceDevice"   "ISDV4"
     Option        "Mode"          "Absolute"
EndSection

Section "InputDevice"
     Driver        "wacom"
     Identifier    "stylus"
     Option        "Device"        "/dev/ttyS0"
     Option        "Type"          "stylus"
     Option        "ForceDevice"   "ISDV4"
EndSection

Section "InputDevice"
     Driver        "wacom"
     Identifier    "eraser"
     Option        "Device"        "/dev/ttyS0"
     Option        "Type"          "eraser"
     Option        "ForceDevice"   "ISDV4"
EndSection

# ^^^ from thinkwiki.org ^^^

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
EndSection

Section "Device"
        Identifier  "Card0"
        Driver      "intel"
        VendorName  "Intel Corporation"
        BoardName   "Mobile 915GM/GMS/910GML Express Graphics Controller"
        BusID       "PCI:0:2:0"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth 24
        SubSection "Display"
                Viewport   0 0
                Depth     1
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     4
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     8
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     15
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection
 
Old 11-13-2007, 10:55 PM   #2
redjokerx
Member
 
Registered: Aug 2004
Location: San Diego
Distribution: Slackware
Posts: 303

Original Poster
Rep: Reputation: 31
/proc/acpi/ibm/brightness seems to be stuck at 0
/sys/class/backlight/ibm/brightness or actual_brightness seem to be stuck at zero as well.

I think this whole thing might've happened when I unloaded and reloaded ibm-acpi driver (PowerTOP suggested it might be causing power draw).

Can anybody confirm or deny this? I'll try rebooting tomorrow and see if this still happens.
 
  


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backlight, brightness, ibm, lcd, thinkpad


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