On Fri, 18 Oct 2024 at 13:28:05 +0100, Stuart Henderson wrote:
> I've not got a test machine running yet, but from observations (I
> haven't gone through all the logs to verify, those "seconds after start"
> logs are a pain to correlate with time of day!) it seems to only happen
> when the monitor is in a dpms power-saving mode. Not sure if that
> rings any bells..
As I mentioned earlier, running xrandr or xbacklight makes it print
the modelines in Xorg.0.log and if your monitor has a lot of them,
it will print a ton.
nano:~$ wc -l /var/log/Xorg.0.log
809 /var/log/Xorg.0.log
nano:~$ xbacklight -set 80
nano:~$ wc -l /var/log/Xorg.0.log
905 /var/log/Xorg.0.log
nano:~$ xbacklight -set 20
nano:~$ wc -l /var/log/Xorg.0.log
1021 /var/log/Xorg.0.log
When the monitor is off, is a screensaver running? Maybe it's
constantly checking xrandr to find new monitors attached? Or some
other thing in mate that is adjusting backlight?
