The lamentations of colord and gdm3

I recently installed a machine dedicated to transmit live Holy Masses from my parish and I discovered a subtle malfunctioning of the hardware that sometimes makes it unusable: the Solid State Disk becomes read-only. As you can imagine, almost everything stopped working. Also logging, of course. As I had to hunt it out and catch it, I redirected it on an external USB key, discovering tons of logs like

nov 20 07:51:27 carloacutis colord[426039]: failed to get session [pid 1500]: Nessun dato disponibile (i.e. no data available)

and entire descriptions of the video modes available in the form of something like

nov 14 09:44:52 carloacutis /usr/lib/gdm3/gdm-x-session[2830]: (II) AMDGPU(0): #0: hsize: 1920  vsize 1080  refresh: 60  vid: 49361
 nov 14 09:44:52 carloacutis /usr/lib/gdm3/gdm-x-session[2830]: (II) AMDGPU(0): #1: hsize: 1680  vsize 1050  refresh: 60  vid: 179
 nov 14 09:44:52 carloacutis /usr/lib/gdm3/gdm-x-session[2830]: (II) AMDGPU(0): #2: hsize: 1600  vsize 1200  refresh: 60  vid: 16553
 nov 14 09:44:52 carloacutis /usr/lib/gdm3/gdm-x-session[2830]: (II) AMDGPU(0): #3: hsize: 1600  vsize 900  refresh: 60  vid: 49321

It happens every time the screen blanks.

In a machine currently used by a human, all those tons of logs – something in the range of a hundred of megabytes per day (in Debian bug #813334 it is labelled as “syslog spam”) are not produces. But the screen of this machine remain almost always blank as I’ve automated the transmissions.

I somehow hacked gdm3 with this two onliner patches:

--- gdm3-3.34.1.orig/daemon/gdm-server.c
+++ gdm3-3.34.1/daemon/gdm-server.c
@@ -242,7 +242,7 @@ gdm_server_init_command (GdmServer *serv
         if (debug)
             verbosity = "7";
         else
-            verbosity = "3";
+            verbosity = "0";
 #endif
 
         if (g_access (SYSTEMD_X_SERVER, X_OK) < 0) {

--- gdm3-3.34.1.orig/daemon/gdm-x-session.c
+++ gdm3-3.34.1/daemon/gdm-x-session.c
@@ -282,7 +282,7 @@ spawn_x_server (State        *state,
         if (state->debug_enabled) {
                 g_ptr_array_add (arguments, "7");
         } else {
-                g_ptr_array_add (arguments, "3");
+                g_ptr_array_add (arguments, "0");
         }
 
         if (state->debug_enabled) {

I should push them if I was sure it’s not harmful to anyone else.

I still have not found how to tell those colord daemon that it can stay quiet.