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--- linux:howtos-tips [2008/01/30 07:39]
127.0.0.1 external edit
+++ linux:howtos-tips [2014/03/28 16:18] (current)
cyril
@@ Line 99: / Line 99: @@
 <code bash>
 xhost +localhost
+</code>
+or/and maybe:
+<code bash>
+xhost local:
 </code>
@@ Line 396: / Line 400: @@
 If sound works with the speakers, but not with the headphones, check with ''alsamixer'' that the headphones output is not muted (''M'' key), and that the volume not at the minimum (up/down keys) (you can change output with left/right keys).
+===== Speakers are not disabled when plugging headphones =====
+If your speakers keep playing sound even if headphones are plugged, check with ''alsamixer'' that "Headphone Jack Sense" is not muted...
 ===== Full screen doesn't stretch image in MPlayer =====
@@ Line 408: / Line 415: @@
 To fix this, kill all ''rlocated'' instances and restart the rlocate service (''/etc/init.d/rlocate restart'').
+====== Configuration ======
+===== Do not wake up on lid open =====
+Add to /etc/local.d/misc.start:
+<code>
+echo " LID" > /proc/acpi/wakeup
+</code>
+Ensure that the file misc.start is executable.
+===== Fix laptop wakes up immediately after suspend =====
+May be due to some USB devices, even if not plugged. Look if some USB* or EHC* or XHC* are enabled in ''/proc/acpi/wakeup'', and disable them:<code>
+echo EHC1 > /proc/acpi/wakeup
+</code>
+You can run it in a script at boot time right before suspending:<code>
+for usb in "EHC1" "EHC2" "XHC"; do
+        state=`cat /proc/acpi/wakeup | grep $usb | cut -f3 | cut -d' ' -f1 | tr -d '*'`
+        echo "device = $usb, state = $state"
+        if [ "$state" == "enabled" ]; then echo $usb > /proc/acpi/wakeup; fi
+done
+</code>
+===== Keep screen off when lid shut =====
+If your laptop don't physically switch off your screen when the lid is closed, it sends an ACPI event. Your system will probably switch off the screen by software (if it does not uncomment the "xset" line in the script), but even if it does when you will move your mouse it will switch back on, even if the lid is still closed. One solution is to use "vbetool", but when I use it a few seconds later I cannot interact with the computer anymore. So instead I disable the mouse, with "xinput" you can selectively disable input devices, such as a mouse, the touchpad, the keyboard, the webcam... (use xinput --list to find ids).
+Create /etc/acpi/actions/lid.sh with execution permissions:
+<code sh>
+#!/bin/sh
+case `cat /proc/acpi/button/lid/LID/state | awk '{print $2}'` in
+    open)
+        #vbetool dpms on
+        DISPLAY=:0.0 XAUTHORITY="/home/cyril/.Xauthority" xinput set-int-prop 12 "Device Enabled" 8 1
+    ;;
+    closed)
+        #xset dpms force off
+        #vbetool dpms off
+        DISPLAY=:0.0 XAUTHORITY="/home/cyril/.Xauthority" xinput set-int-prop 12 "Device Enabled" 8 0
+    ;;
+esac
+</code>
+Edit /etc/acpi/default.sh to add:
+<code sh>
+ case "$group" in
+     button)
+         case "$action" in
++            lid)
++                /etc/acpi/actions/lid.sh
++                ;;
+</code>
+===== Lock on wake up =====
+== With hibernate-scripts ==
+(hibernate-scripts are probably deprecated)
+Add to /etc/hibernate/ram.conf:
+<code>
+LockGnomeScreenSaver true
+</code>
+See "man hibernate.conf" for more options.
+== With pm-utils ==
+When using the button or when it is automatic apparently gnome-power-manager and gnome-screensaver deals correctly with it if you configure it to lock when lid closed. But it doesn't work when you manually call "pm-suspend" for instance.
+So you can add this script /etc/pm/sleep.d/lock:
+<code>
+. "${PM_FUNCTIONS}"
+suspend_nm()
+{
+}
+resume_nm()
+{
+    DISPLAY=:0.0 XAUTHORITY="/home/cyril/.Xauthority" su cyril -c "(gnome-screensaver-command --lock)"
+}
+case "$1" in
+    hibernate|suspend)
+        suspend_nm
+        ;;
+    thaw|resume)
+        resume_nm
+        ;;
+    *) exit $NA
+        ;;
+esac
+</code>
+A more complete one to automatically detect the user name is available here:
+[[https://wiki.archlinux.org/index.php/Pm-utils#Locking_the_screen_saver_on_hibernate_or_suspend]]
+== With systemd ==
+Create service ''/usr/lib/systemd/system/slimlock.service'':<code>
+[Unit]
+Description=Lock X session using slimlock
+[Service]
+User=cyril
+ExecStart=/usr/bin/slimlock
+[Install]
+WantedBy=sleep.target
+</code>
+Ensure right permissions and enable it:<code>
+chmod a+r /usr/lib/systemd/system/slimlock.service
+systemctl enable slimlock
+</code>
+Now when you suspend the system with ''systemctl suspend'' the screen will be locked.
+===== Hard Drive power management =====
+Copy and edit /usr/lib/pm-utils/power.d/harddrive files to /etc/pm/power.d
+===== Root mail alias =====
+Add to /etc/mail/aliases:
+<code>
+root: <your-real-email-address>
+</code>
+And execute
+<code>
+newaliases
+</code>
+===== hddtemp =====
+Edit the file /usr/share/hddtemp/hddtemp.db, find the line with the hard drive model that is the closest to yours, duplicate it and modify the model into yours.
+===== Gnome Screensaver =====
+If you don't have gnome-session, it will lock correctly the session but won't monitor idle time to start automatically. You can start the script available [[http://www.narf.ssji.net/~shtrom/wiki/projets/gnomescreensavernosession|here]] instead of gnome-session. I had to make the following change to correctly detect the configured idle delay:
+<code patch>
+-gvalue = gclient.get('/apps/gnome-screensaver/idle_delay')
++gvalue = gclient.get('/desktop/gnome/session/idle_delay')
+</code>
+===== Automatically enable/disable second screen =====
+disper -s
+disper -e
+autodisper
+for completely automatic with dock:
+http://askubuntu.com/questions/42741/how-to-automatically-switch-monitors-with-my-laptop-dock/48627#48627