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Dell U2412M monitor complains about input timing after turning off and on again

asked 2013-07-08 21:03:23 -0500

Christian gravatar image

updated 2013-07-09 06:02:33 -0500

FranciscoD_ gravatar image

I have an odd problem with my Dell U2412M monitor, which I have connected to my PC (a Dell StudioSlim 540s, with intel i915 driver) via HDMI (with DVI adapter to the monitor). I'm using KDE on Fedora 18. When booting up my machine into X or resuming it from sleep, things work perfectly. Here's the problem: when I turn off the monitor (or whenever it turns itself off, if configured to do so) while the PC keeps running, I have a hard time getting the monitor to work when turning it on again. One of three things happens:

(1) The monitor pops up a message saying that "The current input timing is not supported by the monitor display. Please change your input to 1920x1200@60Hz".

(2) The expected desktop contents appear on screen, but only for a fraction of a second. Then the monitor goes blank again for a few seconds, and this iterates.

(3) Things work as expected, but unfortunately only after turning the monitor on and off on the order of a dozen times, which isn't workable.

Needless to say, I have the monitor configured to 1920x1200@60Hz in KDE's settings, and I've also tried variations of an xorg.conf in which I expressly state that this is what my monitor needs.

I have no idea how to debug this. It looks as if on power-up events the PC tells the monitor what to do, but otherwise the monitor has a hard time figuring it out. Suggestions?

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answered 2013-07-25 15:48:22 -0500

Christian gravatar image

For the record, this one was solved by replacing the HDMI cable + DVI adapter. :/ So silly...

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Asked: 2013-07-08 21:03:23 -0500

Seen: 5,191 times

Last updated: Jul 25 '13