Hotplugging HDMI fails

[Sami00Sami]

Affected computer: Dell Precision 15 5000 Series (5510) with Quadro M1000M/PCIe/SSE2 graphics card (kernel 4.2.0-23-generic).

Expected behaviour:

- hotplugging HDMI cable would work

Current behaviour:

- Hotpluging doesn't work (no kernel events, used udevadm monitor to verify)

Current observations:

- HDMI output works if connected from the boot
- When DPMS kicks in HDMI output disappears (tested with 2 different monitors)
- Hotpluging doesn't work (no kernel events, used udevadm monitor to verify)
- VGA (via usb-c adapter) works, hotplugging also
- HDMI (via usb-c adapter) causes black screen in computer display and eventually crashes X. Unplugging adapter before crash restores state (computer display restored)
- display port (via usb-c adapter) hotplugging works

I can provide more information if required.

How could I debug this nvidia driver even more? I really would like to solve this issue.

[Sami00Sami (samiaira-gmail)]

I feel that https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-352/+bug/1523800 is duplicate of this.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sean (seanshivak)]

This issue initially happened on both intel and nvidia gpus after 16.04 was released but the bug was fixed for intel gpus at some point but remains for nvidia.