Welcome to my first post, be gentle 
I have Dell Precision 7680 running Ubuntu 22.04 with an Nvidia A1000 for a workstation and play around with CUDA and the like ( eventually ). I have the nvidia drivers installed with ubuntu-drivers and currently on nvidia-driver-550.
Periodically my screens will go black and unresponsive, sometimes just my second screen ( hdmi ). Other odd behavior will occur where my second screen will stay frozen but the laptop screen stays responsive. It seems to be associated with the errors below. When the screens both go black a REISUB won’t restart the machine.
I haven’t go through the process of uninstalling the drivers, defaulting back to the integrated intel gpu, then retrying installing the drivers.
Has anyone come across similar issues? Any suggestion on how to troubleshoot or recover in real time vs a hard reboot? Tell me what logs or info would be helpful.
Error:
Sep 14 09:43:11 Leslie kernel: [167858.505248] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to apply atomic modeset. Error code: -22
Sep 14 09:43:44 Leslie kernel: [167891.553454] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Flip event timeout on head 0
Sep 14 09:43:47 Leslie kernel: [167894.689449] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Flip event timeout on head 0
Sep 14 10:47:14 Leslie kernel: [171701.295825] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Flip event timeout on head 0
Sep 14 10:47:17 Leslie kernel: [171704.303618] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Flip event timeout on head 0
Sep 14 10:47:20 Leslie kernel: [171707.504719] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Flip event timeout on head 0
Sep 14 10:47:20 Leslie kernel: [171707.511915] [drm:nv_drm_atomic_commit [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00000100] Failed to apply atomic modeset. Error code: -22