Hi all,
New member here. I've got a few Ubuntu 20.04 desktops that have the same hardware and OS configuration. All of them ran great until Ubuntu 20.04 reached end-of-life. At that point I wiped the disk and installed 22.04 from scratch. I then installed OBS from the official obs-studio PPA (version 27.2.3). Oddly, however, I immediately started to see heavy delays and even app hangs when I tried switching scenes. Delays can be anywhere from 20 seconds to several minutes.
The scenes pull video from two IP cameras (Axis/RSTP) per scene and then publish the a composite stream (one video full screen, one video subsetted (pip)) to a broadcasting server.
Hardware:
Nvidia driver info....
CPU and memory utilization doesn't seem to be any different than it was with Ubuntu 20.04. These boxes are using virtualGL and x11vnc (they run headless via a HDMI dongle; I remote into them with Apache Guacamole). The cameras are on solid network links of at least 100Mbps (most are 1Gbps links).
The OBS logs in
One last item. The
Any suggestions as to what might be causing the slow down when switching scenes? If I can get to the right scene, it broadcasts fine. Help is appreciated. Thank you!
New member here. I've got a few Ubuntu 20.04 desktops that have the same hardware and OS configuration. All of them ran great until Ubuntu 20.04 reached end-of-life. At that point I wiped the disk and installed 22.04 from scratch. I then installed OBS from the official obs-studio PPA (version 27.2.3). Oddly, however, I immediately started to see heavy delays and even app hangs when I tried switching scenes. Delays can be anywhere from 20 seconds to several minutes.
The scenes pull video from two IP cameras (Axis/RSTP) per scene and then publish the a composite stream (one video full screen, one video subsetted (pip)) to a broadcasting server.
Hardware:
Code:
# lspci
00:00.0 Host bridge: Intel Corporation Device a703 (rev 01)
00:01.0 PCI bridge: Intel Corporation Device a70d (rev 01)
00:04.0 Signal processing controller: Intel Corporation Device a71d (rev 01)
00:08.0 System peripheral: Intel Corporation Device a74f (rev 01)
00:0a.0 Signal processing controller: Intel Corporation Device a77d (rev 01)
00:14.0 USB controller: Intel Corporation Device 7ae0 (rev 11)
00:14.2 RAM memory: Intel Corporation Device 7aa7 (rev 11)
00:15.0 Serial bus controller: Intel Corporation Device 7acc (rev 11)
00:16.0 Communication controller: Intel Corporation Device 7ae8 (rev 11)
00:17.0 SATA controller: Intel Corporation Device 7ae2 (rev 11)
00:1c.0 PCI bridge: Intel Corporation Device 7abe (rev 11)
00:1c.7 PCI bridge: Intel Corporation Device 7abf (rev 11)
00:1d.0 PCI bridge: Intel Corporation Device 7ab4 (rev 11)
00:1f.0 ISA bridge: Intel Corporation Device 7a85 (rev 11)
00:1f.3 Audio device: Intel Corporation Device 7ad0 (rev 11)
00:1f.4 SMBus: Intel Corporation Device 7aa3 (rev 11)
00:1f.5 Serial bus controller: Intel Corporation Device 7aa4 (rev 11)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 2882 (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 22be (rev a1)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 16)
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device b852
04:00.0 Non-Volatile memory controller: Sandisk Corp Device 5017 (rev 01)Nvidia driver info....
Code:
# nvidia-smi
Thu Oct 30 15:33:01 2025
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 580.95.05 Driver Version: 580.95.05 CUDA Version: 13.0 |
+-----------------------------------------+------------------------+----------------------+
| GPU Name Persistence-M | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap | Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|=========================================+========================+======================|
| 0 NVIDIA GeForce RTX 4060 Off | 00000000:01:00.0 On | N/A |
| 37% 33C P8 N/A / 115W | 195MiB / 8188MiB | 16% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
+-----------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=========================================================================================|
| 0 N/A N/A 1388 G /usr/lib/xorg/Xorg 80MiB |
| 0 N/A N/A 1741 G /usr/bin/gnome-shell 18MiB |
| 0 N/A N/A 482943 G obs 28MiB |
+-----------------------------------------------------------------------------------------+CPU and memory utilization doesn't seem to be any different than it was with Ubuntu 20.04. These boxes are using virtualGL and x11vnc (they run headless via a HDMI dongle; I remote into them with Apache Guacamole). The cameras are on solid network links of at least 100Mbps (most are 1Gbps links).
The OBS logs in
~/.config/obs-studio/logs don't seem to be capturing anything at all. I switched scenes before streaming anything while testing this morning, and there is no log at all for today.One last item. The
~/.config/obs-studio folder was copied directly from one of the machines before I wiped 22.04 off it it. Could there be a structural difference that is causing the delays?Any suggestions as to what might be causing the slow down when switching scenes? If I can get to the right scene, it broadcasts fine. Help is appreciated. Thank you!