On Wednesday 22 August 2007, pol wrote: > <posted & mailed> > > After 6 months working fine, the default method to suspend to ram does not > resume X correctly any more, on my laptop. > Luckly, i have found the plain line command 's2ram -f' works, although not > to perfection (e.g. fan does not start). > > I have suitably changed the script used by 'power manager', that is: > /usr/lib/hal/scripts/linux/hal-system-power-suspend-linux > to select 's2ram -f' as command to suspend my machine. Powermanager and HAL are two totally different applications. > However, I would like to understand why the default dbus command does not > work so as to try to fix it, but syntax is so cryptic i need your help. > Here is the command: > dbus-send --system --dest=com.novell.powersave \ > --print-reply /com/novell/powersave \ > com.novell.powersave.action.SuspendToRam > > What are those options? Which parameters affect the resume process? dbus-send is the D-Bus utililty program for sending messages on the D-Bus --system tells the program to connect to the D-Bus system bus (as opposed to connecting to the user's session bus) --dest tells the program which recepient to send to, i.e. which destination program the message should be sent to --print-reply just enabled printing of any answer the destination might send back, e.g. an error or an OK /com/novell/powersave is a so-called object path. This is an internal address of the destination program, so it knows which of its D-Bus enabled objects should process the message com.novell.powersave.action.SuspendToRam is the method/function of the object the message is sent to. Since there are no further parameters, in indicates that this function does not expect any parameters If you need a concept to compare this to, it is a bit like this: the --dest part is the address of a house, the path thing is the description how to reach a certain room and the function is something to do in that room. Cheers, Kevin -- Kevin Krammer, KDE developer, xdg-utils developer KDE user support, developer mentoring
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