Weirdly, this isn't happening as reliably as it used to. It still happens, but not 100% of the time, so I've hard trouble capturing it. I've applied some updates since I first reported it, so that may be changing the behaviour somewhat. I'm definitely still seeing it - just not every time.
And I'm seeing new things too. The dmesg.0 and syslog file I'm attaching today were captured after a similar issue (but not exactly the same). After the screen dimmed and locked, when I moved the mouse the monitor was blacked out and laptop screen on (as originally reported) but this time the login screen was on the laptop. However, I still couldn't log into it - no keyboard actions recognised, except ctrl-alt-F1 which blacked out the screen (but no console log in). I then had no option but to press power button.
I'll continue to try to capture logs with the orig symptoms, but hopefully these will help too.
Weirdly, this isn't happening as reliably as it used to. It still happens, but not 100% of the time, so I've hard trouble capturing it. I've applied some updates since I first reported it, so that may be changing the behaviour somewhat. I'm definitely still seeing it - just not every time.
And I'm seeing new things too. The dmesg.0 and syslog file I'm attaching today were captured after a similar issue (but not exactly the same). After the screen dimmed and locked, when I moved the mouse the monitor was blacked out and laptop screen on (as originally reported) but this time the login screen was on the laptop. However, I still couldn't log into it - no keyboard actions recognised, except ctrl-alt-F1 which blacked out the screen (but no console log in). I then had no option but to press power button.
I'll continue to try to capture logs with the orig symptoms, but hopefully these will help too.