From d6f9447f9df9b8d3b8c296e4ed22ba2e830cc5cc Mon Sep 17 00:00:00 2001
From: Emery Hemingway <emery@vfemail.net>
Date: Fri, 26 Feb 2016 11:38:21 +0100
Subject: [PATCH] import https://nixos.org/wiki/Samsung_NP900X3c

Fixes https://github.com/NixOS/nixpkgs/issues/13171
---
 samsung/np900x3c.nix  | 13 ++++++
 samsung/np900x3c.wiki | 94 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 samsung/np900x3c.nix
 create mode 100644 samsung/np900x3c.wiki

diff --git a/samsung/np900x3c.nix b/samsung/np900x3c.nix
new file mode 100644
index 0000000..73d16bd
--- /dev/null
+++ b/samsung/np900x3c.nix
@@ -0,0 +1,13 @@
+{ lib, ... }:
+with lib;
+{
+  imports = [ ../lib/kernel-version.nix ];
+
+  services.xserver.synaptics.enable = true;
+
+  kernelAtleast = singleton
+    { version = "3.9";
+      msg = "Runtime system freezes can be expected on Linux kernels prior to 3.9, probably  because of bugs in intel video drivers.";
+    };
+
+}
\ No newline at end of file
diff --git a/samsung/np900x3c.wiki b/samsung/np900x3c.wiki
new file mode 100644
index 0000000..e9fc58b
--- /dev/null
+++ b/samsung/np900x3c.wiki
@@ -0,0 +1,94 @@
+= Overview =
+
+Most of the features seem to be working with Linux >= 3.9
+
+== Hardware ==
+
+* CPU Intel(R) Core(TM) i5-3317U CPU @ 1.70GHz
+* RAM 4 GB
+* HDD 128GB SSD
+* Screen 13.3-Inch Screen
+* Graphics Intel HD Graphics 4000, Ivy bridge
+
+= Configuration =
+
+Full configurations is in my
+[https://raw.github.com/grwlf/nixpkgs/local/machines/samsung-np900x3c-v2.nix nixpkgs branch]. Note, it requires several local packages.
+
+=== Touchpad ===
+
+Touchpad is detected as 'ETPS/2 Elantech Touchpad'. xf86-input-synaptics handles
+it well. Corresponding config lines:
+
+<pre>
+  services.xserver = {
+    synaptics = {
+      enable = true;
+      accelFactor = "0.05";
+      maxSpeed = "10";
+      twoFingerScroll = true;
+      additionalOptions =
+        ''
+        MatchProduct "ETPS"
+        Option "FingerLow"                 "3"
+        Option "FingerHigh"                "5"
+        Option "FingerPress"               "30"
+        Option "MaxTapTime"                "100"
+        Option "MaxDoubleTapTime"          "150"
+        Option "FastTaps"                  "1"
+        Option "VertTwoFingerScroll"       "1"
+        Option "HorizTwoFingerScroll"      "1"
+        Option "TrackstickSpeed"           "0"
+        Option "LTCornerButton"            "3"
+        Option "LBCornerButton"            "2"
+        Option "CoastingFriction"          "20"
+        '';
+      };
+  };
+</pre>
+
+=== Wireless ===
+
+System requires iwlwifi-6000g2b-6.ucode in order to work. I've extracted the
+file from some debian package and placed it into /root/firmware. Corresponding
+config settings:
+
+<pre>
+  hardware.firmware = [ "/root/firmware" ];
+</pre>
+
+= Problems =
+There are some. See
+
+* [http://ubuntuforums.org/showthread.php?t=1737086 Ubuntu thread]
+* [http://bugzilla.kernel.org/show_bug.cgi?id=44161 Kernel.org bug]
+* [http://jablonskis.org/2012/linux-and-samsung-series-laptop-9-fn-keys/ jablonskis.org]
+
+=== BIOS problems ===
+I had to disable SSD boot completely in order to boot from USB. Just changing boot priority didn't help.
+
+Fix: Update BIOS up to recent version
+
+=== Battery ===
+Battery charging/discharging indicator doesn't work good.
+
+Fix: Update BIOS up to recent version
+
+=== Lid ===
+Acpi thinks lid is always open
+<pre>
+[ierton@greyblade:~]$ cat /proc/acpi/button/lid/LID0/state 
+state:      open
+</pre>
+
+Related [https://bugzilla.kernel.org/show_bug.cgi?id=44161 Kernel bug #44161]
+
+=== Multimedia keys ===
+* rfkill/fanless don't work
+* volume up/down don't work
+* brightness up/down work, but release is broken
+* touchpad disable works
+
+Related discussion on
+[http://jablonskis.org/2012/linux-and-samsung-series-laptop-9-fn-keys/ jablonskis.org]
+