DVI On;y From Live CD Not From Boot Disk

[measekite]

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.

[RobinVossen]

Ok, so your config is messed up for some reason.
What do the logs say?

However this sounds like a really annoying program, what do you think about just reinstalling the System? Since I noticed in Linux thats often less work

[measekite]

Ok, so your config is messed up for some reason.
What do the logs say?

However this sounds like a really annoying program, what do you think about just reinstalling the System? Since I noticed in Linux thats often less work

I plan on going to Ubuntu 9.10 in November so I will just suffer until then. A few months after that I will build a new machine.

Since it takes a lot of time to configure a new install I will wait until them.

But I just want to understand why booting from a LiveCD gives me both digital and analog and even after a reinstall or nvidia I have this problem. It seems to switch from digital to analog right after the initial splash screen before you see the logon screen.

[MikeTbob]

Something to think about:
When you boot the LiveCD, they load everything including the kitchen sink. Load the LiveCD and check to see if perhaps they have an extra module or two that you do not have running on the HD. compare the output of the LiveCd and your OS.

lsmod

Check to see which video driver is being used on the LiveCD, or post the entire contents of /etc/X11/xorg.conf, you might need some extra option in there.

cat /etc/X11/xorg.conf |grep - driver

cat /etc/X11/xorg.conf

EDIT: you might need to preface those commands with sudo