I have the same graphics card in a Thinkpad P15 Gen1 (with Ubuntu 22.04 installed). Previously, I was using the "metapackage from nvidia-driver-525 (proprietary)" and everything was working fine, including screen sharing. However, after some regular updates on June 17, 2023, the second monitor stopped functioning.
On June 17, 2023, the following package was installed:
2023-06-17 09:16:51 status installed linux-modules-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:51 remove linux-modules-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1 <none>
2023-06-17 09:16:51 status half-configured linux-modules-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:51 status half-installed linux-modules-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:54 status config-files linux-modules-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:56 status installed linux-objects-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:56 remove linux-objects-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1 <none>
2023-06-17 09:16:56 status half-configured linux-objects-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:56 status half-installed linux-objects-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:57 status config-files linux-objects-nvidia-525-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:59 status installed linux-signatures-nvidia-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:59 remove linux-signatures-nvidia-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1 <none>
2023-06-17 09:16:59 status half-configured linux-signatures-nvidia-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:59 status half-installed linux-signatures-nvidia-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:59 status config-files linux-signatures-nvidia-5.19.0-42-generic:amd64 5.19.0-42.43~22.04.1
2023-06-17 09:16:59 status not-installed linux-signatures-nvidia-5.19.0-42-generic:amd64 <none>
Today, after installing some new updates, the issue seems to be resolved. I cannot guarantee that this fix will solve the exact problem mentioned in this post, but it might be worth a try.
2023-06-20 09:55:32 upgrade linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+1 5.19.0-43.44~22.04.1+2
2023-06-20 09:55:32 status half-configured linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+1
2023-06-20 09:55:32 status unpacked linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+1
2023-06-20 09:55:32 status half-installed linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+1
2023-06-20 09:55:32 status unpacked linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+2
2023-06-20 09:55:44 configure linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+2 <none>
2023-06-20 09:55:44 status unpacked linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+2
2023-06-20 09:55:44 status half-configured linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+2
2023-06-20 09:55:46 status installed linux-modules-nvidia-525-5.19.0-43-generic:amd64 5.19.0-43.44~22.04.1+2