Systemd is logging list of NVIDIA GPU interfaces each 30 seconds all the time

Hello,
I would like to ask here, if anyone can help. I really tried hard to find out, how to solve it, but I am helpless. This is long lasting issue.

My machine runs GTX 1080 on Arch Linux + Gnome on Xorg, using the latest Nvidia drivers. When I look at journalctl logs, it’s always full of this NVIDIA-related messages:

Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-7: 165.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-7: Internal TMDS
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-7: disconnected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-6: 1440.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-6: Internal DisplayPort
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-6: disconnected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-5: 165.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-5: Internal TMDS
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-5: disconnected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-4: 1440.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-4: disconnected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-3: Internal TMDS
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-3: disconnected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-2: 1440.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-2: Internal DisplayPort
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): DFP-2: disconnected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): LG Electronics LG TV (DFP-1): 600.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): LG Electronics LG TV (DFP-1): Internal TMDS
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): LG Electronics LG TV (DFP-1): connected
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0):
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): Ancor Communications Inc VW246 (DFP-0): 330.0 MHz maximum pixel clock
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): Ancor Communications Inc VW246 (DFP-0): Internal TMDS
Oct 23 23:17:44 pascal /usr/lib/gdm-x-session[589]: (--) NVIDIA(GPU-0): Ancor Communications Inc VW246 (DFP-0): connected

This repeats each 30 seconds again and again and again. Of course I can provide any additional info when requested. The only thing I can say now is, that it doesn’t matter which monitor/tv is connected.

Thank you very much for any help or tips.

What Gnome extensions are you using? Anything display related? Special autostarts? That message about the connectors normally only gets logged if something queries/changes xrandr settings.

Hello generix, thanks for your reply. Few minutes ago I googled again, and found one old thread with similair problem, and it looks like missing acpid causes Xorg to poll for displays changes. Installed acpid, and the problem disappeared. OMG, why didn’t I found out this before I posted here :-D. It’s weird, I thought that systemd takes care of acpid calls. So, problem is gone, sorry for bothering. Hope this thread will help someone else, who will not have to google it for almost two years. :-)

Hello generix, the acpid wasn’t the reason of the log flood. It was what you said. I use Argos gnome shell extension with a custom script, that allowes me to switch between my LCD and TV. And that script runs every 30s and calls xrandr --listactivemonitors. So thank you again for your reply, I accepted your answer, set the script to stop the auto-update, and the problem is definetely gone.