I have a Lenovo X1 Extreme Gen 5 laptop (running Ubuntu with kernel 5.15.0-47-generic) and a Dell monitor connected via USB-C.
When using the open source video driver, the Dell monitor is detected and working. When using nvidia-driver, the monitor is not detected (but other devices, like a USB keyboard, connected to the monitor is detected and working).
Booted with USB-C monitor plugged in - external monitor not detected (like screenshot above). Turned on fractional scaling, nothing happened. Turned off fractional scaling, nothing happened.
Booted with USB-C monitor NOT plugged in. Turned on fractional scaling, then plugged in USB-C monitor - and it got detected (see second screenshot above).
Please create another nvidia-bug-report.log in the non-working state.
Does running xrandr --setprovideroutputsource NVIDIA-G0 modesetting && xrandr --auto
enable the monitor?
Ok, today I’m at a new location (with new external monitors) and they’re not detected (2 monitors connected to a Lenovo docking station, which is connected to my laptop USB-C). nvidia-bug-report.log.gz (1.1 MB)
xrandr --setprovideroutputsource NVIDIA-G0 modesetting && xrandr --auto made the built-in monitor flash quickly, but still no detection of external monitors.
The fractional scaling on/off trick also made no difference.
Will try to reboot with the USB-C connected and see if it helps.
Rebooting with USB-C plugged in made no difference. Mouse and keyboard from the docking station works, but no external displays detected.
$ nvidia-smi
Thu Sep 15 08:52:10 2022
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 515.65.01 Driver Version: 515.65.01 CUDA Version: 11.7 |
|-------------------------------+----------------------+----------------------+
| 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 ... Off | 00000000:01:00.0 Off | N/A |
| N/A 43C P3 N/A / N/A | 5MiB / 4096MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 2587 G /usr/lib/xorg/Xorg 4MiB |
+-----------------------------------------------------------------------------+
$ nvidia-xconfig --query-gpu-info
Number of GPUs: 1
GPU #0:
Name : NVIDIA GeForce RTX 3050 Ti Laptop GPU
UUID : GPU-f7241ef5-c58c-40ff-2813-9f52f35b12e2
PCI BusID : PCI:1:0:0
Number of Display Devices: 0
Is that a different dock model? It seems to have DisplayLink devices, which means it doesn’t pass through the DP links of the nvidia gpu but has its own devices needing drivers.
Yes, this is a different dock (Lenovo dock), compared to the one I normally use (which is just a Dell monitor with built-in dock).
Do you know what driver I need to install?
I should add that I’ve been using the same setup (Lenovo dock + 2 monitors ) for a year with my old X1 Carbon…so it’s a working setup.
I tried to change from DP to HDMI for one of the monitors - and through the dock there’s no difference. But HDMI directly into the laptop does work (it’s not a long term solution, but at least it gives me one additional monitor to work on today).
Fine to hear. Please keep in mind that you now have a triple-gpu setup (intel/nvidia/displaylink) and the displaylink drivers don’t work well in conjunction with the nvidia drivers. So you shouldn’t use prime-select to switch modes.
Hello, I am having a very similar problem to the above. I have checked that all individual components work. I have a lenovo y740 with RTX 2070 max Q, using a dell monitor. The monitor is connected with a HDMI cord going into a dongle that then connects to the USB-C. This set up has been working fine for mouths now, and and just stopped working today. my primary monitor works fine, going directly to the HDMI port on the laptop. my NVIDIA drivers are also up to date.
Same issue. I installed DisplayLink driver, but still not able to view from usb-c port. Can you please provide detailed debugging steps and recommended actions? Thank you!
Just to bump this again, I am having the same issue with my Thinkpad P14s and Ubuntu 20.04.5. The ‘fix’ that havard posted earlier works for me too. Annoying to have to do this each time I boot my laptop though. Also a driver reinstall seems to fix it temporarily. I’m on nvidia 515 (525 was unstable on my system)
