[gdm-list] gdm-3.4.1: is patching gdm-server.c for extra command line arguments safe for this use case?

[Leho Kraav <leho kraav com>]

Hi all


I'm trying to obtain fast user switching functionality for my secondary 
video card. Currently I'm using xdm to just run an Xorg instance on the 
second card:

/etc/X11/xdm/Xservers:
:0 local /usr/bin/X :0 -nolisten tcp -config xorg-6600.conf -novtswitch 
-sharevts -isolateDevice PCI:0:2:0 vt8

But I don't have a user-friendly user switching UI with xdm. It is 
widely documented on the interwebs that somewhere between IIRC 2.20 and 
3.0 gdm lost the ability to accept user-configured Xorg parameters. I 
understand 3.4 landed some udev-based multi-seat support, but I'm not 
sure if this is applicable to my situation at all.

So in the meanwhile I'd just like to try for something simple:

diff --git a/daemon/gdm-server.c b/daemon/gdm-server.c
index d0d8ff9..df89555 100644
--- a/daemon/gdm-server.c
+++ b/daemon/gdm-server.c
@@ -320,7 +320,7 @@ gdm_server_init_command (GdmServer *server)
 fallback:
 #endif

-        server->priv->command = g_strdup_printf (X_SERVER " -br 
-verbose%s", logverbose);
+        server->priv->command = g_strdup_printf (X_SERVER " :0 -br 
-nolisten tcp -config xorg-6600.conf -novtswitch -sharevts 
-isolateDevice PCI:0:2:0 -verbose%s vt8", logverbose);
 }

 static gboolean


Is this destined to fail for either or both:

a) just switching from xdm to gdm
b) being able to use fast user switching on the second display adapter


Thanks for any information.

--
Leho Kraav, M.Sc.

http://leho.kraav.com