Just accidentally suspended my machine after several hours of uptime - so here's another dmesg transcript.
It contains some more error messages that I did not see the previous time. After resume, this time my screen remained black. After about 15 seconds a lot of error messages filled my screen, and then lightdm seemingly restarted showing me the boot-time greeter. I was then able to switch back and forth to another VT. After trying to log in through the greeter, the screen went black again. Pressing SysRq+K after a while made the empty Unity desktop appear, yet completely frozen with my keyboard lights indicating a kernel panic.
Just accidentally suspended my machine after several hours of uptime - so here's another dmesg transcript.
It contains some more error messages that I did not see the previous time. After resume, this time my screen remained black. After about 15 seconds a lot of error messages filled my screen, and then lightdm seemingly restarted showing me the boot-time greeter. I was then able to switch back and forth to another VT. After trying to log in through the greeter, the screen went black again. Pressing SysRq+K after a while made the empty Unity desktop appear, yet completely frozen with my keyboard lights indicating a kernel panic.