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lightdm errors

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If this is off topic, let me know a better forum please.

Overnight, I'm getting errors every 2s from lightdm.
Jun 04 01:57:01 cerberus lightdm[1546921]: xrandr: cannot find mode 1920x1200
Jun 04 01:57:03 cerberus lightdm[1546948]: xrandr: cannot find mode 1920x1200
Jun 04 01:57:05 cerberus lightdm[1546982]: xrandr: cannot find mode 1920x1200
Jun 04 01:57:07 cerberus lightdm[1547009]: xrandr: cannot find mode 1920x1200

and so on.

I have three monitors on the onboard connectors.  The left (1920x1080) is
tall, the other two (1920x1200) are wide.  The default situation was that
the monitors were in the wrong order, and the left one was sideways.  I
wrote a script which used xrandr to fix this in XFCE, though I rarely need it.

Anyhow I don't know where that error is coming from.  There's a line

eben@cerberus:/etc/lightdm$ grep fixm *
lightdm.conf:# greeter-setup-script = /export/bin/fixmonitors

but as you see it's commented out.  And the string "1920x1200" appears
nowhere in the config files:

eben@cerberus:/etc/lightdm$ grep 1920 *
eben@cerberus:/etc/lightdm$

Does anyone know how to increase logging in lightdm so I can see why it's
complaining?  Thanks.

--
The United States of America: Screwing with
  the English Language for over 200 years.

     --  Mike Sphar on ASR

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Thread

lightdm errors Eben King <eben@gmx.us> - 2024-06-04 16:00 +0200
  Re: lightdm errors Charles Curley <charlescurley@charlescurley.com> - 2024-06-04 18:50 +0200
    Re: lightdm errors Charles Curley <charlescurley@charlescurley.com> - 2024-06-04 20:00 +0200
    Re: lightdm errors eben@gmx.us - 2024-06-04 20:10 +0200

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