Hello, this seems to happen to me, also. Debian 9.3 kernel 4.14.0-0.bpo.3-amd64 Nvidia driver from the "testing" repository, 384.111 Nvidia card GeForce 1060
I found only two suspicious things in `nvidia-bug-report.log.gz`, which was freshly generated after the bug: [32940.892161] [Firmware Bug]: ACPI MWAIT C-state 0x0 not supported by HW (0x0) [32940.892198] cache: parent cpu15 should not be sleeping [32940.892287] microcode: CPU15: patch_level=0x08001129 [32940.892650] CPU15 is up [32940.894082] ACPI: Waking up from system sleep state S3 ... [32941.030214] nvidia 0000:23:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000e address=0x0000000000000000 flags=0x0000] https://pastebin.com/hQhyp8kC and [ 32952.583] (II) NVIDIA: Using 24576.00 MB of virtual memory for indirect memory [ 32952.583] (II) NVIDIA: access. [ 32952.586] (II) NVIDIA(0): ACPI: failed to connect to the ACPI event daemon; the daemon [ 32952.586] (II) NVIDIA(0): may not be running or the "AcpidSocketPath" X [ 32952.586] (II) NVIDIA(0): configuration option may not be set correctly. When the [ 32952.586] (II) NVIDIA(0): ACPI event daemon is available, the NVIDIA X driver will [ 32952.586] (II) NVIDIA(0): try to use it to receive ACPI event notifications. For [ 32952.586] (II) NVIDIA(0): details, please see the "ConnectToAcpid" and [ 32952.586] (II) NVIDIA(0): "AcpidSocketPath" X configuration options in Appendix B: X [ 32952.586] (II) NVIDIA(0): Config Options in the README. [ 32952.599] (II) NVIDIA(0): Setting mode "DFP-0:nvidia-auto-select,DFP-1:nvidia-auto-select" [ 32952.702] (==) NVIDIA(0): Disabling shared memory pixmaps [ 32952.702] (==) NVIDIA(0): Backing store enabled [ 32952.702] (==) NVIDIA(0): Silken mouse enabled [ 32952.703] (==) NVIDIA(0): DPMS enabled -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1721428 Title: Artful (17.10) Session logout after screen turned off Status in GNOME Shell: Unknown Status in Nouveau Xorg driver: New Status in gnome-shell package in Ubuntu: Incomplete Status in mutter package in Ubuntu: Incomplete Bug description: Whenever I turn off my screen, the computer (a desktop PC) logs me out of my session. Here is a discussion thread with users of similar issue: https://ubuntuforums.org/showthread.php?t=2372388&p=13694312&posted=1#post13694312 To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1721428/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
