how to drop the cache in linux

echo 1 > /proc/sys/vm/drop_caches

reconfigure laptop screen from suspend

Put the following into /etc/pm/sleep.d to make reconfigure the screens
after suspend or hibernation. Nice to have if you have suspended with a
different screen configuration.


#!/bin/bash

. /usr/lib/pm-utils/functions

case "$1" in
   hibernate|suspend)
   ;;
   thaw|resume)
    export DISPLAY=:0
 export XAUTHORITY=/home/username/.Xauthority
 xrandr --auto
   ;;
   *)
   ;;
esac

exit

suspend/hibernate with nvidia on dell latitude 820

Grabbed the text from internetarchive, you never know...

Suspend to RAM on the Dell D820, proprietary NVIDIA drivers under Ubuntu Gutsy

It works for Debian Sid too (tested). Anyone tried this on other Dell Latitude models? Please report your results by E-mail ;)

There should be everything here to get it work. That's what I did on a fresh Ubuntu Gutsy, after installing the proprietary driver.

/etc/X11/xorg.conf extracts

Section "Device"
       Identifier      "nVidia Corporation G72M [GeForce Go 7400]"
       Driver          "nvidia"
       Busid           "PCI:1:0:0"
       Option          "UseEDIDDpi"            "False"
       Option          "AddARGBVisuals"        "True"
       Option          "AddARGBGLXVisuals"     "True"
       Option          "NoLogo"                "True"
       Option          "NvAGP"                 "1"
EndSection

/etc/defaults/acpi-support changes

SAVE_VBE_STATE=false #ex-true
POST_VIDEO=false #ex-true
USE_DPMS=false #ex-true
LOCK_SCREEN=false #ex-true