Raspberry Pi Forums

I finally got a chance to really play with my Pi tonight, and I cannot get it work with my big monitor over DVI.

I have a HUGE 30-inch 2560x1600 monitor (Dell U3011), and I CANNOT get the Pi to talk to this monitor over a HDMI-to-DVI cable.

Note that this exact same cable works great with my spare Dell S2209W 1920x1080 monitor, so the Pi is OK and the cable is OK.

I can also get a display if I connect the Pi to the big monitor with a HDMI-to-HDMI cable, but that is not a long-term solution, as I need this thing to work through my DVI-KVM. I cannot have two monitors on my desk for more than a few days due to the "wife-approval-factor."

Yes, I tried the troubleshooting steps listed in the wiki.

Debian6-19-04-2012

It fails with a NO config.txt, and the following config.txt:

disable-overscan=1
config_hdmi_boost=4
hdmi_force_hotplug=1
hdmi_drive=1
hdmi_group=2
hdmi_mode=82

How do I debug this?

No ideas yet?

I do admit that it is a little perverse hooking up a $35 computer up to a $1200 monitor.

OK. I solved it.

The key turned out to be finding the right modes. hdmi_group=2 and hdmi_mode=69 gives me a perfect 1920x1200 display (awesome).

The trick turned out to be turning ssh on, and booting the device with the non-working display. From there, I was able to ssh in and determine what modes were supported (as it turns out, NO CEA modes were supported).

I do not know why auto-negotiation failed, and that is something that probably needs to be looked into.

Can you capture your edid (with /opt/vc/bin/tvservice -d edid.dat) and post it here?

Here it is...