GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
sudo update-grubNow you should change brightness using hotkey.
sudo apt-get install -y libxcb1-dev libxcb-keysyms1-dev libxcb-util0-dev libxcb-icccm4-dev libyajl-dev libstartup-notification0-dev libxcb-randr0-dev libev-dev libxcb-xinerama0-dev libpango1.0-dev libxcursor-dev libxcb-keysyms1-dev libpango1.0-dev libxcb-util0-dev libxcb-icccm4-dev libyajl-dev libstartup-notification0-dev libev-dev libxcb-xkb-dev libxcb-cursor-dev libxcb-xinerama0-dev libxkbcommon-x11-dev libxkbcommon-dev
sudo apt-get install -y libxcb1-dev libxcb-keysyms1-dev libxcb-util0-dev libxcb-icccm4-dev libyajl-dev libstartup-notification0-dev libxcb-randr0-dev libev-dev libxcb-xinerama0-dev build-essential freeglut3-dev libfreeimage-dev libgl1-mesa-dev libopenal-dev bpango1.0-dev libsdl-ttf2.0-dev libsndfile-dev libxinerama-dev libxcursor-dev libxcb-cursor-dev
sudo apt-get install ifenslave
[main]
plugins=ifupdown,keyfile
dns=dnsmasq
[ifupdown]
managed=false
[keyfile]
unmanaged-devices=mac:your_mac
auto bond0
iface bond0 inet dhcp
bond_mode 0
bond_primary eth0
bond_miimon 100
bond_downdelay 200
bond_updelay 200
wpa-ssid ssid
wpa-ap-scan 1
wpa-psk password
wpa-scan-ssid 1
wpa-iface wlan0
dns-nameserver 8.8.8.8
slaves eth0 wlan0
nameserver 8.8.8.8
nameserver 8.8.4.4
"如果一个连接或者会话的数据包从不同的接口发出的话，中途再经过不同的链路，在客户端很有可能会出现数据包无序到达的问题，而无序到达的数据包需要重新要求被发送，这样网络的吞吐量就会下降"
//Sample using LiquidCrystal library
#include <LiquidCrystal.h>
/*******************************************************
This program will test the LCD panel and the buttons
Mark Bramwell, July 2010
********************************************************/
// select the pins used on the LCD panel
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
// define some values used by the panel and buttons
int lcd_key = 0;
int adc_key_in = 0;
#define btnRIGHT 0
#define btnUP 1
#define btnDOWN 2
#define btnLEFT 3
#define btnSELECT 4
#define btnNONE 5
// read the buttons
int read_LCD_buttons()
{
adc_key_in = analogRead(0); // read the value from the sensor
// my buttons when read are centered at these valies: 0, 144, 329, 504, 741
// we add approx 50 to those values and check to see if we are close
if (adc_key_in > 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result
// For V1.1 us this threshold
if (adc_key_in < 50) return btnRIGHT;
if (adc_key_in < 250) return btnUP;
if (adc_key_in < 450) return btnDOWN;
if (adc_key_in < 650) return btnLEFT;
if (adc_key_in < 850) return btnSELECT;
// For V1.0 comment the other threshold and use the one below:
/*
if (adc_key_in < 50) return btnRIGHT;
if (adc_key_in < 195) return btnUP;
if (adc_key_in < 380) return btnDOWN;
if (adc_key_in < 555) return btnLEFT;
if (adc_key_in < 790) return btnSELECT;
*/
return btnNONE; // when all others fail, return this...
}
void setup()
{
lcd.begin(16, 2); // start the library
lcd.setCursor(0,0);
lcd.print("Push the buttons"); // print a simple message
}
void loop()
{
lcd.setCursor(9,1); // move cursor to second line "1" and 9 spaces over
lcd.print(millis()/1000); // display seconds elapsed since power-up
lcd.setCursor(0,1); // move to the begining of the second line
lcd_key = read_LCD_buttons(); // read the buttons
switch (lcd_key) // depending on which button was pushed, we perform an action
{
case btnRIGHT:
{
lcd.print("RIGHT ");
break;
}
case btnLEFT:
{
lcd.print("LEFT ");
break;
}
case btnUP:
{
lcd.print("UP ");
break;
}
case btnDOWN:
{
lcd.print("DOWN ");
break;
}
case btnSELECT:
{
lcd.print("SELECT");
break;
}
case btnNONE:
{
lcd.print("NONE ");
break;
}
}
}
ac_cv_file__dev_ptmx=no
ac_cv_file__dev_ptc=no
CONFIG_SITE=config.site CC=arm-linux-gcc CXX=arm-linux-g++ AR=arm-linux-ar RANLIB=arm-linux-ranlib ./configure --host=arm-linux --build=x86_64-linux-gnu --prefix=/python LDFLAGS="-static -static-libgcc" CPPFLAGS="-static -march=armv4t" --disable-ipv6
make HOSTPYTHON=./hostpython HOSTPGEN=./Parser/hostpgen BLDSHARED="arm-linux-gcc -static" CROSS_COMPILE=arm-linux- CROSS_COMPILE_TARGET=yes HOSTARCH=arm-linux BUILDARCH=x86_64-linux-gnu
make install HOSTPYTHON=./hostpython BLDSHARED="arm-linux-gcc -static" CROSS_COMPILE=arm-linux- CROSS_COMPILE_TARGET=yes prefix=~/mypython
sudo qemu-system-x86_64 -kernel /boot/vmlinuz-3.8.0-19-generic -m 256這段指令執行到最後會發生 kernel panic 。因為找不到 root
sudo qemu-system-x86_64 -kernel /boot/vmlinuz-3.8.0-19-generic -initrd /boot/initrd.img-3.8.0-19-generic -append "root=/ram/" -m 256上面這個指令複雜一些，kenel 會讀取 initrd (用來讀取其他檔案系統的玩意，細節） 。他會執行這個執行檔在 initrd 裡的 /init 這個執行檔，最後會失敗。進入 terminal 模式。你可以打 cat /init 看他做了什麼。
Device Boot Start End Blocks Id System /dev/sdd1 2048 133119 65536 83 Linux /dev/sdd2 133120 15278079 7572480 83 Linux
$mkdir /tmp/sdd1 /tmp/sdd2
$sudo mount -t ext2 ${card}1 /tmp/sdd1
$sudo mount -t ext4 ${card}2 /tmp/sdd2
$sudo tar -C /tmp/sdd1 -xvf bootfs-part1.tar.gz
$sudo tar -C /tmp/sdd2 -xvf rootfs-part2.tar.gz
$sync
$sudo umount /tmp/sdd1
$sudo umount /tmp/sdd2
qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 panic=1 rootfstype=ext4 rw" -hda 2013-09-25-wheezy-raspbian.img