A couple days ago I upgraded from 14.04 to 16.04 on a Lenovo Z50-75. When I close the lid, it suspends and powers down correctly; when I open the lid, I can hear the hard disk spin up, but the screen never comes back on, and I wind up having to power it off.
Won't come back from suspend 16.04 LTS and Xubuntu 16.04.1 won't wake up correctly after opening lid seemed similar, so I followed the instructions on Linux Daddy here and am now running a 4.4.25 kernel, but that didn't help.
sudo pm-suspend --quirk-dpms-on has the same effect: the machine powers down; pressing space or whatever causes it to spin back up, but the screen never turns back on.
I see other answers talk about editing your
/etc/systemd/logind.conf; I haven't changed anything in there (as my problem is on resume, not suspend). Everything in that file is commented out.
I see My Lenovo Z40 can't recover from sleep/suspend mode is about 16.04 on a Lenovo Z40 (similar I think to my Z50), and the one answer there mentions the Nvidia driver. However, the
lspci commands used here to figure out your NVIDIA card model don't say anything about an NVIDIA card; they just say AMD Radeon.
This page on help.ubuntu.com talks about editing your
/etc/X11/xorg.conf, but I don't have one of those, and there's no "Screen" section in anything under
Blank screen after resuming from suspend state on Ubuntu 16.04 (issue started after installing Nvidia Drivers) has instructions on working around it by installing bumblebee; I did that ("sort of"--see below), but there was a warning during the installation:
No Nvidia card found. If you really have an Optimus system, try selecting the Optimus setup in BIOS and run: sudo dpkg-reconfigure bumblebee-nvidia
I say I "sort of" did that, because step 1 & 2 was switching to Intel graphics in nvidia-settings, and... I had some problem with my nvidia-settings installation (starting it up, it complained that the registry key file should've been installed along with the driver, and to see the README; there was no README, either). And bumblebee isn't quite working (the Bumblebee daemon isn't starting automatically?), but I don't think I care. In any case, this didn't fix it, although maybe that's because I didn't do it correctly.
The only real progress I've made is adding the
/etc/pm/sleep.d/01_switchvt script suggested in the answer to Unable to resume after suspend. After adding that, manually running
pm-suspend, and then hitting the spacebar, the machine starts back up properly; but closing the lid, waiting, & reopening it (and flailing on the keyboard, etc.) still doesn't turn the screen back on. That seems to be a step in the right direction, at least... So, seeing on this thread on Fedora Forums that
systemd might be doing the sleep, I put something similar in my
/lib/systemd/system-sleep/, and I can see (from writing to a log file) that it's successfully calling
chvt during suspend & resume, but that didn't fix it.
Any idea how I can get suspend/resume to work again?