Ummm, why turn the monitor off first? I use suspend rather than hibernate, on a macbook 4,1 and just close the lid. I get a password screen as soon as I open up.
Keith Bainbridge 0447667468 keithrbaugro...@gmail.com Sent from my APad On 6 Jan 2017 08:04, "solitone" <solit...@mail.com> wrote: > I'm on debian stretch, and my computer is a MacBookPro 12,1. I've recently > noticed an issue that affect my system when it hibernates. > > When the screen is already switched off and then the system hibernates, it > won't resume correctly later on. Specifically, the monitor will be > switched off > again at the end of the resume process. > > E.g. I give the following command in order to switch off the monitor: > > $ sleep 1 && xset dpms force off > > then I close the lid so that my system hibernates. Then I resume the > system. > The monitors turns on, as I see the boot loader screen and some boot > messages. > But then, when the resume is complete, the screen is switched off again, > and > there is no way to turn it on. The only solution is press the power button > to > turn off the entire computer. > > I get the same issue even when, instead of using the xset command, I wait > several minutes so that the screen is switched off automatically by KDE's > power management, and then I hibernate the system. > > By contrast, I have no issue if I hibernate when the screen is still on. > The > resume works perfectly well. Besides, suspend (to RAM) has no issue either, > both when the screen is on and when it is off. > > I've already reported a bug to the mainteiners of debian kernel. But in the > meanwhile, as a workaround I'm thinking of using a systemd script that > forces > the monitor on just before the system starts hibernating. I've tried with > "xset dpms force on", however it won't in fact turn on the monitor. Is > there a > way to do this? > > Thanks & Regards, > Davide > >
