So... After reconfiguring uswsusp I increased logging level to 7. Also i tried disabling the nvidia modules again but the same issue persists. This is the information I could get:
http://imgur.com/gallery/YirJhdx The upper image shows what happens while trying to hibernate with nvidia modules enabled and on the other they were disabled. In both cases, hibernation works fine at first, even with 4 gb of ram usage and 2 hibernation cycles, but after I use the system more, and looks like the more ram gets used more likely it is the issue to happen. If I keep not opening programs or using the OS at all except for hibernating again and again after it turns on, seems like hibernation will work indefinitely. I thought it could be some specific program but I confirmed it's not, at least not something I am directly starting. ** Attachment added: "noNvidia.jpg" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1819915/+attachment/5251824/+files/noNvidia.jpg -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1819915 Title: s2disk freezes at saving image to disk (hibernation) Status in linux package in Ubuntu: Confirmed Bug description: This started happening after I upgrade to ubuntu 18.04.2. In 18.04.1 hibernation was working flawlessly on my machine. (with kernel 4.15-46! not a kernel issue then?) Another thing that got updated recently was nvidia drivers which were known to cause hibernation issues, but those were on restoring the snapshot. http://imgur.com/gallery/jOyHEcL --> I get stuck on this screen after running hibernate or pm-hibernate. (sys-req REISUB combination works there and is the only good way to restart I found) SPECS Laptop Dell Inspiron 7567 A30P Intel Core i7-7700HQ 1x 16 GB DDR4 1 TB HDD + 256 GB SSD Nvidia GeForce GTX 1050 Ti FHD display Intel Dual Band Wireless AC 3165 1x1 Motherboard: Intel HM175 Graphics adapter: NVIDIA GeForce GTX 1050 Ti (Laptop) - 4096 MB, Core: 1620 MHz, Memory: 1752 MHz, GDDR5, 21.21.13.7320 (ForceWare 373.20), Nvidia Optimus nvidia driver: 415.27 INFO # uname -a Linux matheus-Inspiron-15-7000-Gaming 4.15.0-46-generic #49-Ubuntu SMP Wed Feb 6 09:33:07 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux # free -m total used free shared buff/cache available Mem: 15906 2925 8742 161 4238 12485 Swap: 16333 0 16333 # cat /etc/fstab | grep swap # swap was on /dev/sda8 during installation UUID=70d967e6-ad52-4c21-baf0-01a813ccc6ac none swap sw 0 0 n root@matheus-Inspiron-15-7000-Gaming:/home/matheus# cat /var/log/syslog | grep hibernate root@matheus-Inspiron-15-7000-Gaming:/home/matheus# cat /var/log/syslog | grep hiber root@matheus-Inspiron-15-7000-Gaming:/home/matheus# cat /var/log/syslog | grep s2disk root@matheus-Inspiron-15-7000-Gaming:/home/matheus# cat /var/log/syslog | grep hibernation I could find nothing scrolling up on syslog about the hibernation process or with grep.... An interesting Note is that if I run hibernate just after I boot, it works and resumes perfectly! But after some system usage it randomly has that problem if I try. The percentage it freezes at is also random, sometimes 0, 1 even 30 once. --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0c: matheus 25949 F...m pulseaudio /dev/snd/pcmC0D0p: matheus 25949 F...m pulseaudio /dev/snd/controlC0: matheus 25949 F.... pulseaudio /dev/snd/seq: matheus 4986 f.... qsynth CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=bfc6f294-b737-4999-a444-01e1f410de06 InstallationDate: Installed on 2018-05-10 (308 days ago) InstallationMedia: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) MachineType: Dell Inc. Inspiron 15 7000 Gaming NonfreeKernelModules: nvidia_modeset nvidia Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-46-generic root=UUID=659db14c-2a6c-4f9c-93bf-d31c4a84abb6 ro nouveau.blacklist=1 debug no_console_suspend systemd.log_level=info nvidia-drm.modeset=0 ProcVersionSignature: Ubuntu 4.15.0-46.49-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-46-generic N/A linux-backports-modules-4.15.0-46-generic N/A linux-firmware 1.173.3 Tags: bionic Uname: Linux 4.15.0-46-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm audio cdrom dip kvm lpadmin netdev plugdev sambashare sudo vboxusers _MarkForUpload: True dmi.bios.date: 08/15/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.8.1 dmi.board.name: 0P84C9 dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.8.1:bd08/15/2018:svnDellInc.:pnInspiron157000Gaming:pvr:rvnDellInc.:rn0P84C9:rvrA01:cvnDellInc.:ct10:cvr: dmi.product.family: Inspiron dmi.product.name: Inspiron 15 7000 Gaming dmi.sys.vendor: Dell Inc. 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