Dell U2412M monitor complains about input timing

[Christian Kreibich <christian@whoop.org>]

Hi all,

I hope I have found the right forum for asking my question -- apologies
if that's not the case. I have a Dell U2412M connected to a Dell
StudioSlim 540s, with the i915 driver on Fedora's 3.9.6 Kernel running
KDE (4.10.4). The monitor is connected via an HDMI cable, with a DVI
adapter to the monitor. When booting up my machine into X or waking it
from sleep, things work perfectly. However, 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 until I turn it off again.

(3) Things work as expected, but unfortunately only after turning the
monitor on and off on the order of a dozen times. Even then, the
configuration is a bit wonky (for example, xrandr shows all connections
disconnected).

I have the monitor configured to 1920x1200@60Hz both in KDE's settings
and via variations of an xorg.conf (including no xorg.conf) in which I
expressly state that this is what my monitor needs.

I'm wondering if the problem might be HDMI-related and whether it sounds
familiar to folks on this list. Any help is welcome.

Cheers,
Christian