(In reply to comment #49)
> (In reply to comment #47)
> > With kernel 3.15 and later I got "diplay not working after suspend" again.
> > But I find out how to work around. I had scrip on shortcut for KDE and this
> > script made display to work. Command of script is "sleep 1; xset dpms force
> > standby".
> Are you using that workaround alone, or with the pm-suspend + quirks
> solutions (shown in comment #15 and comment #34) ?

With quirks like in comment #34 and in grub options.