Since the last couple days, I'm suffering a killer bug on my Ubuntu 18.04 that never had before.
I'm working on my desktop session, and suddenly, randomly, the screen turns black and then the login screen appears. I have to login again, and a blank session starts (that means, all my previously opened apps, programs, windows – are gone, like if I did a fresh boot).
This does not happen always, but too often, enough to feel like it's a Russian Roulette. In fact, on the last time this bug happened, I could not even get to the login screen again – just the typical "/dev/sda1 clean xxxxx blocks…" message appearing on the top and nothing else, HDD without activity and nothing happened so I had to reboot pressing CTRL+ALT+SUPR twice.
Specs of my system are:
CPU: AMD FX8320
GPU: Nvidia GTX970 (using privative drivers provided by Ubuntu)
Ubuntu: 18.04, vanilla/original flavour
2 screens (one with HDMI, one with VGA) – This bug happens since I changed my old secondary screen, connected using DVI-D, with my new secondary screen, connected using VGA.
Apart from all that, I have nothing weird installed that I'm aware of, but I edited the monitors.xml file on gdm3 to show the login screen on my HDMI monitor instead of the VGA one, by running
sudo cp ~/.config/monitors.xml /var/lib/gdm3/.config.
However, I've been having this problem before I did this modification, but maybe it avoids getting me back to the login screen, so I restored the original file just in case.
ls -al /var/crash:
total 89936 drwxrwsrwt 2 root whoopsie 4096 mar 19 10:47 . drwxr-xr-x 14 root root 4096 jul 25 2018 .. -rw-r----- 1 david whoopsie 92078339 mar 18 17:43 _opt_teamviewer_tv_bin_TeamViewer.1000.crash
sudo lshw -C video:
*-display descripción: VGA compatible controller producto: GM204 [GeForce GTX 970] fabricante: NVIDIA Corporation id físico: 0 información del bus: pci@0000:01:00.0 versión: a1 anchura: 64 bits reloj: 33MHz capacidades: pm msi pciexpress vga_controller bus_master cap_list rom configuración: driver=nvidia latency=0 recursos: irq:48 memoria:fd000000-fdffffff memoria:c0000000-cfffffff memoria:d0000000-d1ffffff ioport:e000(size=128) memoria:c0000-dffff
ls -al ~/.local/share/gnome-shell/extensions:
total 32 drwxrwxr-x 8 david david 4096 feb 5 16:06 . drwx------ 3 david david 4096 mar 25 11:49 .. drwxrwxr-x 3 david david 4096 oct 29 18:02 firstname.lastname@example.org drwxrwxr-x 4 david david 4096 sep 23 2018 email@example.com drwxrwxr-x 6 david david 4096 nov 7 21:26 gnomeGlobalAppMenu@lestcape drwxrwxr-x 4 david david 4096 feb 5 16:06 firstname.lastname@example.org drwxrwxr-x 2 david david 4096 oct 30 21:19 topIcons@email@example.com drwxrwxr-x 6 david david 4096 nov 7 21:29 firstname.lastname@example.org
Nvidia drivers installed: 390.116 (latest version provided by vanilla Ubuntu 18.04 repositories)