TLDR: most likely the issue is fso-deviced
I have a Fujitsu laptop Lifebook and I am using Ubuntu 12.10. Since I
upgraded to this version of Ubuntu I experienced random screen blanking
each few minutes, like a "blank" screensaver. I solved this issue for
myself, but I want to describe it here for others.
The unsuccesful way I tried to solve this issues:
I disabled dpms and screensaver but something re-enabled it and blanked the
screen.
The methods how I tried to disable the dpms and screensaver are:
1) Launched this script:
xset dpms force on
xset s noblank
xset s off
xset -dpms
2) I put in /etc/rc.local these commands:
setterm -blank 0 -powerdown 0
echo -ne "\033[9;0]" >> /etc/issue
3) Added a new file in /usr/share/X11/xorg.conf.d/99-paul-dpms.conf
Section "Monitor"
Identifier "monitor"
Option "DPMS" "false"
EndSection
Section "ServerLayout"
Identifier "monitor"
Option "BlankTime" "0"
Option "StandbyTime" "0"
Option "SuspendTime" "0"
Option "OffTime" "0"
EndSection
4) All of the above with minor changes
The problem still persisted.
The successfull workaround:
Today (after many days of random screen blanking) I noticed that it is somehow
related with the WiFi Internet connection. Indeed, after I turned off and on
the router, the screen blanked imediately after wifi reconnection (usually
after few seconds).
So, decided to monitor the dbus system messages with the command: dbus-monitor
--system
I noticed that always just before screen blanking there is a "lock"
message where Interface=org.freesmartphone.Device.IdleNotifier:
--------dbus system monitor log----------------------
signal sender=:1.20 -> dest=(null destination) serial=3397
path=/org/freesmartphone/Device/IdleNotifier/0;
interface=org.freesmartphone.Device.IdleNotifier; member=State
string "idle_dim"
signal sender=:1.4 -> dest=(null destination) serial=2978
path=/org/freedesktop/NetworkManager/Devices/0;
interface=org.freedesktop.NetworkManager.Device.Wireless;
member=PropertiesChanged
array [
dict entry(
string "Bitrate"
variant uint32 1000
)
]
signal sender=:1.20 -> dest=(null destination) serial=3399
path=/org/freesmartphone/Device/IdleNotifier/0;
interface=org.freesmartphone.Device.IdleNotifier; member=State
string "idle_prelock"
signal sender=:1.20 -> dest=(null destination) serial=3401
path=/org/freesmartphone/Device/IdleNotifier/0;
interface=org.freesmartphone.Device.IdleNotifier; member=State
string "lock"
signal sender=:1.4 -> dest=(null destination) serial=2979
path=/org/freedesktop/NetworkManager/AccessPoint/0;
interface=org.freedesktop.NetworkManager.AccessPoint; member=PropertiesChanged
[screen shuts down here]
[I move the mouse and after less than one minute...]
signal sender=:1.4 -> dest=(null destination) serial=3000
path=/org/freedesktop/NetworkManager/Devices/0;
interface=org.freedesktop.NetworkManager.Device.Wireless;
member=AccessPointRemoved
object path "/org/freedesktop/NetworkManager/AccessPoint/15"
signal sender=:1.4 -> dest=(null destination) serial=3001
path=/org/freedesktop/NetworkManager/AccessPoint/0;
interface=org.freedesktop.NetworkManager.AccessPoint; member=PropertiesChanged
array [
dict entry(
string "Strength"
variant byte 81
)
]
signal sender=:1.20 -> dest=(null destination) serial=3424
path=/org/freesmartphone/Device/IdleNotifier/0;
interface=org.freesmartphone.Device.IdleNotifier; member=State
string "idle_prelock"
signal sender=:1.20 -> dest=(null destination) serial=3426
path=/org/freesmartphone/Device/IdleNotifier/0;
interface=org.freesmartphone.Device.IdleNotifier; member=State
string "lock"
[screen shuts down here again]
----------------------------------
So, the process which sent the message is "fsodeviced" (from "fso-
deviced" package, the freesmartphone.org). I uninstalled the fso-deviced
and the problem went away.
So, for anyone looking a solution to this annoying problem, this is the
workaround. If you need more help on debugging this issue, I will
reinstall this package in order to provide more useful data.
Paul
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https://bugs.launchpad.net/bugs/952521
Title:
Screen blanking and dpms can't be turned off
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