I am running Jaunty with a BFG 6600 and a ViewSonic 2235wm Monitor. The monitor has both a DVI and VGA Analog port.

I have been running DVI for the past two months with a clean install of Jaunty and prior with Feisty for two years.

I just rebooted from hard disk and the screen was black. I connected the analog cable (now have both connected which is ok) and the analog works fine but I cannot switch to DVI using the buttons on the monitor.

Here is what I did so far.

I booted from the Live CD and both DVI and VGA work fine and I could switch between using the monitor controls.

When I boot from the hard disk only VGA works so I uninstalled the nvidia drivers, rebooted, reinstalled nidia and rebooted and have the same problem. No DVI.

I do not think the problem is with the nvidia drivers since this happens before you fully boot up.

The only thing I can think of is to reinstall the entire OS but then I will have to spend hours getting my configuration the way I like it.

The fact that is works OK from Live CD tells me the DVI ports on both the monitor and video card work and the cables are ok.

Does anybody have any ideas.

Just to be clear: Do you have a dual-output card, and a dual-input monitor, and you have both card plugs connected to both monitor plugs? If so...

Most likely, the LiveCD, for whatever reason, was configured to enable both video card outputs (each is configured as a single video card, basically) but with your hard-disk installation, that configuration is not in effect by default. As a result, only ONE of the video card outputs is being enabled by default. That is normal.

You would need to specify in your xorg.conf file, a device section for each card output, as well as a monitor section for each monitor connection. Probably also, you would need to have an extra "screen" section, for the second card+monitor combination.

I have a pretty much very similar setup, with dual-output nvidia cards and Samsung 2243WM monitors, and all is well doing what I describe above.

If you need help configuring your xorg.conf file as I describe, first do a search for a thread in the HARDWARE forum, posted by me, which lists a bunch of xorg.conf examples I have used over the past few years, for clues as to what you need in your file.

If I've missed the point of your question, my apology; please explain again in more detail if I have

Sasha