Re: [gdm-list] help: Xvnc + gdm

[Brian Cameron <Brian Cameron Sun COM>]

Travis:

I think you may need to run gdm with the --nodaemon option in a
debugger and see if you can track down where it is hanging.  Can
you do this?

Brian

> On 5/15/06, Brian Cameron <Brian Cameron sun com> wrote:
> > It sounds like GDM may be having trouble starting the Xserver.  Can
> > you start up Xvnc by hand and try running the command to start X
> > and see if you can get X to startup on the display directly?  Without
> > using GDM to manage the display, in other words?
>
> GDM isn't managing the display.  In all my trials, I was running Xvnc
> or vncserver manually.
>
> IIUC, they should be connecting to it via XDMCP over the loopback
> interface.  When they try, they hang.  If I don't tell it to XDMCP
> query localhost, it sits there with a black screen and a X cursor.
>
> I originally reported that I saw a gdmlogin child being started, but
> now I believe this was a misinterpretation.
>
> I did an strace on Xvnc, and it appeared to be waiting in a select()
> loop.  Based on the tcpdump output, it appears it sent the last XDMCP
> message, so maybe it's waiting for a response from gdm but it never
> comes?
>
> I've replicated the problem on another computer, Fedora Core 5 instead 
> of FC3.
>
> I couldn't coax any debugging output from either program.