ASUS Eee PC 1001p

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Revision as of 13:10, 1 February 2011 by Mbrown (talk | contribs) (LCD Brightness: - kernel 2.6.37 changes)
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ACPI and Intel KMS

Screen goes black when Intel KMS and ACPI is on. Brightness controls aren't working.

Solution: Add the following to your kernel parameter list:

 acpi_osi=Linux acpi_backlight=vendor

I was unable to get this to work until I changed to grub2. Can someone else confirm (or refute) this please? TheFlyingPengwyn 21:18, 1 June 2010 (EDT)

I am still using grub(1) and it works like a charm --Lowercase 05:45, 1 July 2010 (EDT)

There is a better solution, as those parameters break some fn keys:

With acpi_osi=Linux or both - mute, wireless and sleep keys do not work.

With acpi_backlight=vendor, brightness is not shifted, but control is totally disabled, and brightness does not restore to max when ac power is restored.

All keys now work perfectly without any additional kernel parameters. The only problem is shifted brightness. This can be corrected by[1]:

setpci -s 00:02.0 f4.b=ff

Where "00:02.0" is pci address of video card. This shifts up min and max brightness levels on hardware level, without affecting anything in /sys/class/backlight/... or /proc/acpi/video/VGA/LCDD/...

Using acpi_backlight=vendor and changing f4.b register simultaneously will result in even brighter, blinding maximum backlight, while used separately the effect is roughly equal.

--Psycho zs 09:39, 2 October 2010 (EDT)

Network Adapter

The network adapter for wired LAN does not or rarely get recognized - "lspci" and "ifconfig -a" don't list it.

Solution: Add the following to your kernel parameter list:


LCD Brightness

As of kernel 2.6.37, LCD brightness information can be found in the following files:

/sys/devices/virtual/backlight/acpi_video/brightness /sys/devices/virtual/backlight/acpi_video/actual_brightness /sys/devices/virtual/backlight/acpi_video/max_brightness

So aside from using Fn + F5, F6, you can also do the following to adjust the brighness (eg from a script such as /etc/rc.local):

# echo <Number> > /sys/devices/virtual/backlight/acpi_video/brightness

If brightness levels are erratic, download the latest bios from

If maximum brightness seems lower, than it should be, see setpci solution above.


Two-Finger scrolling works with a /etc/X11/xorg.conf like this:

 Section "InputDevice"
  Identifier  "SynapticsTouchpad"
  Driver      "synaptics"
  Option      "AlwaysCore"        "true"  # send events to CorePointer
  #Option      "Device"            "/dev/input/mice"
  Option      "Device"            "/dev/psaux"
  Option      "Protocol"          "auto-dev"
  Option      "SHMConfig"         "false" # configurable at runtime? security risk
  Option      "LeftEdge"          "1700"  # x coord left
  Option      "RightEdge"         "5300"  # x coord right
  Option      "TopEdge"           "1700"  # y coord top
  Option      "BottomEdge"        "4200"  # y coord bottom
  Option      "FingerLow"         "25"    # pressure below this level triggers release
  Option      "FingerHigh"        "30"    # pressure above this level triggers touch
  Option      "MaxTapTime"        "180"   # max time in ms for detecting tap
  Option      "VertEdgeScroll"    "true"  # enable vertical scroll zone
  Option      "HorizEdgeScroll"   "true"  # enable horizontal scroll zone
  Option      "CornerCoasting"    "true"  # enable continuous scroll with finger in corner
  Option      "CoastingSpeed"     "0.30"  # corner coasting speed
  Option      "VertScrollDelta"   "100"   # edge-to-edge scroll distance of the vertical scroll
  Option      "HorizScrollDelta"  "100"   # edge-to-edge scroll distance of the horizontal scroll
  Option      "MinSpeed"          "0.10"  # speed factor for low pointer movement
  Option      "MaxSpeed"          "0.60"  # maximum speed factor for fast pointer movement
  Option      "AccelFactor"       "0.0020"    # acceleration factor for normal pointer movements
  Option      "VertTwoFingerScroll"   "true"  # vertical scroll anywhere with two fingers
  Option      "HorizTwoFingerScroll"  "true"  # horizontal scroll anywhere with two fingers
  Option      "TapButton1" "1"
  Option      "TapButton2" "2"
  Option      "TapButton3" "3"

Kernel configs

Working config for 2.6.34-rc5: