CentOS - Jan 2007 - Switching from Vesa driver to video adapter driver fails

The Vesa driver works fine with CentOS 4.4. I have an NVidia 6200 video 
adapter. I go to Applications | System Settings | Display | Hardware tab 
and find my video adapter in the list and set it. The dialog tells me I 
have to log out for it to take effect, so I duly do that. I then getting 
a message from a non-graphics screen saying that the attempt to switch 
to the video adapter failed. When I view why, amidst all the information 
given is the messages:

(EE) No devices detected.
Fatal server error:
No screens found

I am able to switch back to the Vesa driver through the non-graphics 
screen, and this brings me back to my graphics login and I am once again 
successfully in CentOS 4.4 using the Vesa driver.

Does anybody have any idea what the messages above mean or how I can 
correct it so it can successfully load my video adapter specific settings ?

The NVidia 6200 is definitely on the Hardware tab menu, that is my video 
adapter, and I have the latest Xorg updates for CentOS 4.4.

On Fri, 12 Jan 2007 at 12:52pm, Edward Diener wrote
> The Vesa driver works fine with CentOS 4.4. I have an NVidia 6200 video 
> adapter. I go to Applications | System Settings | Display | Hardware tab
and
> find my video adapter in the list and set it. The dialog tells me I have to
> log out for it to take effect, so I duly do that. I then getting a message 
> from a non-graphics screen saying that the attempt to switch to the video 
> adapter failed. When I view why, amidst all the information given is the 
> messages:
>
> (EE) No devices detected.
> Fatal server error:
> No screens found
>
> I am able to switch back to the Vesa driver through the non-graphics
screen,
> and this brings me back to my graphics login and I am once again
successfully
> in CentOS 4.4 using the Vesa driver.
>
> Does anybody have any idea what the messages above mean or how I can
correct
> it so it can successfully load my video adapter specific settings ?
The contents of /var/log/Xorg.0.log would be very useful in debugging this 
(read: necessary).  If you have somewhere you can put them up for download 
(http or ftp), that'd be much preferable to mailing them to the list.

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University

Edward Diener wrote:
> The Vesa driver works fine with CentOS 4.4. I have an NVidia 6200 
> video adapter. I go to Applications | System Settings | Display | 
> Hardware tab and find my video adapter in the list and set it. The 
> dialog tells me I have to log out for it to take effect, so I duly do 
> that. I then getting a message from a non-graphics screen saying that 
> the attempt to switch to the video adapter failed. 
[snip]

Use the vesa driver or use the proprietary nvidia driver.  The nv driver 
from xorg (or at least the version(s) supplies with Centos 4 do not 
support my 6200 card.  No amount of fiddling made any difference.  The 
proprietary driver supports it very nicely (if your computing philosophy 
allows you to use  it).

Ted Miller