tvservise return edid of previously used display

[Candlestone]

I got a Raspberry Pi for Christmas, and haven't had time until recently to play with it until now (building a robot in 6 weeks takes most of ones free time). My pi works fine with our tv, but it doesn't want to work with my Dell 1901FP monitor using a HDMI to DVI cable. I've tried getting the EDID and parsing it, but on a new install it doesn't work. It works fine on our tv using HDMI so it's not broken. When I tried to use it with the 1901FP it dumped the EDID from the tv! Anyone have an idea as to whats going on here? I'd also appreciate any help in getting the pi to drive the monitor at the native resolution (1280x1024@60Hz), which the pi doesn't want to do (When I set it do hdmi_gorup=2 and hdmi_mode=35 it displays at 1280x720@60Hz). Thanks in advance for helping a Pi Newbie!

Edit: Fixing resolution from 2018x768@60Hz to 1280x720@60Hz

[FTrevorGowen]

If you're using "Wheezy 2013-02-09" you may now need "hdmi_force_hotplug=1" - see the wiki at http://elinux.org/R-Pi_Troubleshooting# ... put_at_all for more info.
Trev.

[Candlestone]

I am now using "Wheezy 2013-02-09", I tried it yesterday before posting to see if it fixed the issue.

I've tried a bunch of things, but haven't keep track of them so I'm going to try everything even if I have before. Here's what I've got so far from testing after your reply:

• Using pi with 5V 1A PSU and HDMI to DVI:
• config.txt file with no active lines rresulted in 1280x720@60Hz with overscan and some horizontal green lines appearing and disappearing
• config.txt file with the following active lines

  Code: Select all

  hdmi_force_hotplug=1

  resulted in 1280x720@60Hz with overscan and some horizontal green lines appearing and disappearing

So I don't think that makes a difference with this monitor.

I see I had the displayed resolution posted incorrectly in my first post as 2018x768@60Hz... edited that.

[FTrevorGowen]

Is this thread of any relevance/ help?:
http://www.raspberrypi.org/phpBB3/viewt ... 28&t=38818
(Unless you've already read it? )
Trev.

[Candlestone]

Thanks for linking to that thread. I hadn't seen it yet but will go ahead and try it and report back.

[Candlestone]

config.txt file with:

Code: Select all

framebuffer_width=1280
framebuffer_height=1024
hdmi_force_hotplug=1
hdmi_drive=2

results in monitor saying "Cannot Display This Video Mode" and tvservice -s reporting the following over SSH

Code: Select all

state 0x12001a [HDMI CEA (4) RGB lim 16:9], 1280x720 @ 60Hz, progressive

config.txt file with

Code: Select all

framebuffer_width=1280
framebuffer_height=1024
hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=35
hdmi_drive=2

results in monitor saying "Cannot Display This Video Mode", and tvservice -s reporting the following over SSH

Code: Select all

state 0x12001a [HDMI CEA (4) RGB lim 16:9], 1280x720 @ 60Hz, progressive

And tvservice -n reports that there is no device connected, when I do have a display.