Question about the modesetting on X server

[Julien Cristau]

On Thu, Apr 28, 2011 at 00:25:40 -0700, Alan Coopersmith wrote:

> On 04/27/11 10:26 PM, Huang, FrankR wrote:
> > Okay. I understand that. But how the X server knows that no cliens are connected again?
> 
> It keeps a count of open clients, increments it when a new client
> connects, decrements it when one disconnects.   When it decrements
> nClients, if the new value is now 0, then set the flag to reset in
> dispatch.
> 
> > Let me describe my debug process. I use GDB to debug the X server. When the X server is booting up, I set the breakpoint on modesetting function. Then I run "xrandr -s 1280x1024" to set the mode.
> 
> Start xlogo before running xrandr if you don't want the reset.
> Or xclock.  Or twm, or any client that doesn't XCloseDisplay()
> right away like xrandr, xdpyinfo, xset, etc. do.
> 
Or start Xorg with -noreset to disable that behaviour.

Cheers,
Julien