Not having any log evidence of the system waking up is common. It usually just means the filesystem journal wasn't flushed before the reboot. To avoid this you can wait 10 seconds before rebooting and/or press Alt+SysRq+S (https://en.wikipedia.org/wiki/Magic_SysRq_key) before rebooting.
NVreg_PreserveVideoMemoryAllocations should be set already to avoid bug 1876632 which can also cause freezes. So you should never turn that off. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2124978 Title: Graphics driver (Nvidia) does not resume from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-580/+bug/2124978/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
