From aa847ba8d74eceeb816c3c8827a1c6822b75f44d Mon Sep 17 00:00:00 2001
From: Edouard DUPIN <yui.heero@gmail.com>
Date: Mon, 17 Sep 2018 21:36:48 +0200
Subject: [PATCH] [DEV] add documentation

---
 .config/awesome/rc.lua   |  6 ++---
 4_graphic_interface.md   |  9 +++++++-
 7_controlCPU.md          | 28 +++++++++++++++++++++++
 8_disable_nvidia_card.md | 34 ++++++++++++++++++++++++++++
 mosquitto.md             | 48 ++++++++++++++++++++++++++++++++++++++++
 5 files changed, 121 insertions(+), 4 deletions(-)
 create mode 100644 7_controlCPU.md
 create mode 100644 8_disable_nvidia_card.md
 create mode 100644 mosquitto.md

diff --git a/.config/awesome/rc.lua b/.config/awesome/rc.lua
index a1b2047..59f6e51 100644
--- a/.config/awesome/rc.lua
+++ b/.config/awesome/rc.lua
@@ -241,7 +241,7 @@ root.buttons(awful.util.table.join(
 
 -- {{{ Key bindings
 globalkeys = awful.util.table.join(
-    awful.key({ modkey,           }, "Pause",
+    awful.key({ modkey,           }, "F12",
         function ()
             awful.util.spawn("xlock")
         end,
@@ -259,7 +259,7 @@ globalkeys = awful.util.table.join(
     awful.key({ modkey,           }, "Right",
         function ()
             -- TODO : Do the last ID better ...
-            if awful.tag.selected().name ~= "12" then
+            if awful.tag.selected().name ~= "11" then
                 awful.tag.viewnext()
             end
         end,
@@ -399,7 +399,7 @@ clientkeys = awful.util.table.join(
 -- Bind all key numbers to tags.
 -- Be careful: we use keycodes to make it works on any keyboard layout.
 -- This should map on the top row of your keyboard, usually 1 to 9.
-for i = 1, 12 do
+for i = 1, 11 do
     globalkeys = awful.util.table.join(globalkeys,
         -- View tag only.
         awful.key({ modkey }, "F" .. i,
diff --git a/4_graphic_interface.md b/4_graphic_interface.md
index a3a4d62..03f6ec7 100644
--- a/4_graphic_interface.md
+++ b/4_graphic_interface.md
@@ -1,3 +1,10 @@
+Set first the Xautority:
+
+```
+touch ~/.Xauthority
+```
+
+
 gui
 ---
 ```
@@ -41,7 +48,7 @@ Check the Card graphic corectly install
 # list the output card : (permit to know wich graphic ard we have)
 lspci | grep VGA
 # install all the graphic card drivers:
-pacman -S xorg xorg-drivers xorg-xinit
+pacman -S xorg xorg-xinit
 # restart computer
 # ...
 # install bench tool
diff --git a/7_controlCPU.md b/7_controlCPU.md
new file mode 100644
index 0000000..fa51c8e
--- /dev/null
+++ b/7_controlCPU.md
@@ -0,0 +1,28 @@
+CPU can be downgraded to reduce fan noise
+=========================================
+
+For this you have tools
+
+Disable intel burst
+```
+echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo
+```
+
+Force the CPU to not upper a frequency:
+```
+echo 30 > /sys/devices/system/cpu/intel_pstate/max_perf_pct
+```
+
+you can check the all values with :
+```
+cat /sys/devices/system/cpu/intel_pstate/*
+```
+
+you can check you CPU frequency with:
+```
+cat /proc/cpuinfo | grep MHz
+```
+
+you can check :
+
+https://wiki.archlinux.org/index.php/CPU_frequency_scaling
\ No newline at end of file
diff --git a/8_disable_nvidia_card.md b/8_disable_nvidia_card.md
new file mode 100644
index 0000000..d796b21
--- /dev/null
+++ b/8_disable_nvidia_card.md
@@ -0,0 +1,34 @@
+Disable the nvidia 'nouveau driver'
+===================================
+
+see
+
+https://askubuntu.com/questions/841876/how-to-disable-nouveau-kernel-driver
+
+
+just do:
+========
+
+According to the NVIDIA developer zone: Create a file
+```
+nano /etc/modprobe.d/blacklist-nouveau.conf
+```
+
+with the following contents:
+```
+blacklist nouveau
+options nouveau modeset=0
+```
+
+Regenerate the kernel initramfs:
+```
+sudo update-initramfs -u
+```
+
+and finally: reboot
+```
+shutdown -r now
+```
+
+Read more at: http://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#ixzz4rQODN0jy
+
diff --git a/mosquitto.md b/mosquitto.md
new file mode 100644
index 0000000..ddc645d
--- /dev/null
+++ b/mosquitto.md
@@ -0,0 +1,48 @@
+Basic mosquitto interface
+=========================
+
+
+Install mosquitto
+-----------------
+
+```
+yaourt -S mosquitto
+go get github.com/RedBeardLab/mqtt-stereo
+```
+
+Run mosquitto
+-------------
+
+```
+systemctl start mosquitto
+```
+
+Read a simple topic
+-------------------
+
+```
+mosquitto_sub -h localhost -t "sensor/temperature"
+```
+
+Write on a single topic
+-----------------------
+
+```
+mosquitto_pub -h localhost -t sensor/temperature -m 22.5
+```
+
+Record MQTT message:
+--------------------
+
+```
+go run github.com/RedBeardLab/mqtt-stereo --topic=sensor/temperature record
+```
+
+Play MQTT message:
+--------------------
+
+```
+go run github.com/RedBeardLab/mqtt-stereo --topic=sensor/temperature play
+```
+
+