topic Re:dGPU missing on reboot in Intel® Arc™ Discrete Graphics

dGPU missing on reboot

Dimonor — Sat, 25 Jul 2026 13:53:43 GMT

GPU = Intel Arc B580
OS = Ubuntu server 26.04

When I go from full power off, to power on (even without drivers installed), my GPU prides a video output.
However when I reboot, there is no video output any more, and the GPU is not detected.
The OS is booted (I can SSH into it), but the GPU is not detected.

It occurs ever boot,.

Bios version is at the latest.

Re:dGPU missing on reboot

Ramgound_Intel — Sat, 25 Jul 2026 15:51:42 GMT

Hello Dimonor,

Thank you for posting on Intel Community Forum and for providing such a detailed description of the issue. We completely understand how frustrating this must be, and we want to assure you that your concern is being taken seriously. We are committed to getting this resolved for you.

To summarize our understanding of the issue:

Your Intel Arc B580 GPU is detected and provides video output on a fresh power on
However, after a reboot, the GPU is no longer detected and no video output is available
The OS itself boots successfully and is accessible via SSH
This occurs on every reboot
BIOS is updated to the latest version

To help us investigate this further, we have a few questions:

Does the issue occur with a warm reboot (sudo reboot) as well as a hard reboot?

Additionally, we kindly request that you provide your SSU logs as this will allow us to review your complete system configuration and help us tailor our troubleshooting specifically to your setup rather than providing generic guidance.

Steps to Generate the SSU Report

Download and run the Intel® System Support Utility (SSU).
Click Scan.
Once the scan is complete, click Next.
Select Save and save the report as a .txt file.
Attach the SSU report to your response.

Please follow the steps below to collect the SSU report and share it with us at your earliest convenience.

We appreciate your patience and look forward to your response.

Best Regards,

Ramgound

Intel Customer Support Technician

Re: dGPU missing on reboot

Dimonor — Sat, 25 Jul 2026 17:55:40 GMT

Hi,

Before this I have only tried a warm reboot.
Just tested: It does happen with a hard reboot (tested 3 times: from working, hard reboot (button on case wired to the reset switch on the motherboard), OS booted but no GPU out).
Side note: reboot in general seems faster than power on.

Regarding SSU, note I am running Ubuntu Server 26.04, in my case headless, and your instructions are Windows GUI based. But https://www.intel.com/content/www/us/en/support/articles/000008563/ethernet-products.html had the instructions I needed.

I ran SSU while there was a display out ("SSU with GPU detected.txt"), and after a reboot thus without a display signal ("SSU no display out.txt").

Best Regards

Re: dGPU missing on reboot

Dimonor — Sun, 26 Jul 2026 22:36:08 GMT

I found some other weird apparent GPU behavior, specifically a display signal switch effecting if the GPU is detected on boot:

When booting (from cold) the PC with a HDMI cable straight from GPU to the monitor, the system **detects** and uses the GPU.
When booting (from cold) the PC without any HDMI cable the system **detects** the GPU.

But when booting (from cold) the PC with a HDMI switch (set to connect the PC and the monitor) between the PC and the monitor, the system **does not detect** the GPU.
But when booting (from cold) the PC with a HDMI switch (set not connect the PC and the monitor, from other experience I know the PC should be aware it is not connected) between the PC and the monitor, the system **does detect** the GPU, when after boot switching the HDMI switch to connect the PC and the monitor, the monitor claims **not** to have any display signal.

I do **not** really care about the actual display signal.
I do really care about detecting the GPU, since I want to use it for compute.

Best Regards

Re: dGPU missing on reboot

Dimonor — Sun, 26 Jul 2026 22:47:39 GMT

Disregard the last message.

The HDMI switch is powered by the HDMI cable, one of the inserted cables was linked to a powered off system via an HDMI to DVI cable, without that cable connected the GPU is detected every time I boot from cold.

Re:dGPU missing on reboot

Ramgound_Intel — Mon, 27 Jul 2026 15:19:05 GMT

Hello Dimonor,

Thank you for the detailed update and for the additional testing you performed. We appreciate the time and effort you have taken to investigate the behavior and share your findings with us.

We have received your SSU reports from both the working and non-working states, as well as your observations regarding the reboot behavior and the HDMI switch configuration.

We also appreciate the clarification regarding the HDMI switch. It is helpful to know that the issue appears to be influenced by the HDMI switch's power characteristics and the HDMI-to-DVI connection to a powered-off system, and that the GPU is now being detected consistently during cold boots after removing that connection.

At this point, we would like some time to carefully review the information and logs you have provided. We will analyze the SSU reports and the behavior you observed to determine whether any additional investigation or troubleshooting is required.

We appreciate your patience while we review the case. We will get back to you as soon as we have completed our analysis or if we require any further information.

Thank you for your cooperation, and please feel free to share any additional observations if you notice further changes in behavior.

Best Regards,

Ramgound

Intel Customer Support Technician

Re:dGPU missing on reboot

Ramgound_Intel — Wed, 29 Jul 2026 15:27:43 GMT

Hello Dimonor,

Thank you for your continued cooperation.

To help us better understand and investigate the issue, could you please provide a video recording demonstrating the behavior of the system in the following scenarios:

When the GPU is detected correctly
When the GPU is not detected

The video will help us compare both states and identify any differences that may be contributing to the issue.

Additionally, could you please let us know:

Has this dongle/adapter ever worked correctly with this system?
If so, when was the last time it worked as expected?
Do you have access to another compatible dongle/adapter that you can use to cross-check whether the same behavior occurs?

This information will help us determine whether the issue may be related to the adapter itself or another component in the display path.

Once the video recording and requested information are available, please share them with us, and we will continue our investigation.

We look forward to your response.

Best Regards,

Ramgound

Intel Customer Support Technician

Re: dGPU missing on reboot

Dimonor — Wed, 29 Jul 2026 16:56:40 GMT

Hoi,

Regarding the dongle/adapter, I presume you mean the HDMI switch I mentioned earlier?
It is currently working correctly (2 PCs are connected, both powered on, both native HDMI).
Besides that it is also behaving strangely without the PC with the intel GPU connected, so I do not think it is related to the GPU.

I attached the video of the system rebooting (in other words from GPU detected to GPU not detected), not sure it will help.
What happens is:

- The system shuts down

- And boots again, except without display. When I SSH in: ``lspci`` shows no VGA device.

Best Regards

Re:dGPU missing on reboot

Ramgound_Intel — Thu, 30 Jul 2026 11:04:34 GMT

Hello Dimonor,

Thank you for your update and for sharing the video.

Based on your observations, you have confirmed that the issue also occurs when the PC with the Intel GPU is not connected and that the HDMI switch/adapter behaves unexpectedly independent of the graphics card. Given this information, it appears that the issue is not related to the Intel GPU.

As a result, we will proceed with closing this inquiry at this time. We recommend reaching out to the HDMI switch/dongle manufacturer or vendor for further assistance, as they may be better positioned to investigate the behavior you are experiencing.

If, in the future, you gather additional information indicating that the issue is related to the Intel GPU, please feel free to open a new support thread, and we will be happy to assist you further.

Thank you for contacting Intel Support.

Best Regards,

Ramgound

Intel Customer Support Technician

Re: dGPU missing on reboot

Dimonor — Thu, 30 Jul 2026 11:17:42 GMT

Hi,

There where 2 issues.
One (the HDMI switch) is indeed concluded.
The other is not: my GPU disappearing on reboot, please read the full chain for details.

Regards

Re: dGPU missing on reboot

Dimonor — Sun, 16 Aug 2026 19:02:16 GMT

Still not solved