No 10bpc on external monitor when laptop is closed - 2

alex133 · ‎01-06-2026

Hello,

@RandyT_Intel , this is a follow-up to my previous thread (No 10bpc on external monitor when laptop is closed, HDR is broken), where I complained about my external screen falling back to 24 bit when laptop screen is closed.

Here I'm adding the requested artifacts:

- dell-24bit.txt: ssu.sh output with closed laptop

- dell_and_laptop.txt: ssu.sh output with open laptop

- gdctl-show-v-m.txt: gdctl -v -m output

Video example 1: 24 to 30 bit transition on logout with closed laptop

Video example 2: 24 to 30 bit transition on opening laptop (HDR gets enabled, but does not function properly, which is probably a different issue).

# System Details Report
---

## Report details
- **Date generated:**                              2026-01-06 12:40:38

## Hardware Information:
- **Hardware Model:**                              Lenovo ThinkPad X1 Carbon Gen 8
- **Memory:**                                      16.0 GiB
- **Processor:**                                   Intel® Core™ i7-10610U × 8
- **Graphics:**                                    Intel® UHD Graphics (CML GT2)
- **Disk Capacity:**                               (null)

## Software Information:
- **Firmware Version:**                            N2WET49W (1.39 )
- **OS Name:**                                     Fedora Linux 43 (Workstation Edition)
- **OS Build:**                                    (null)
- **OS Type:**                                     64-bit
- **GNOME Version:**                               49
- **Windowing System:**                            Wayland
- **Kernel Version:**                              Linux 6.18.3-200.fc43.x86_64

I didn't have a chance to run Ubuntu with Wayland to see if there is any difference.

Hope this helps.

Best regards.

alex133 · ‎01-06-2026

I tried to run a Wayland session on Ubuntu Live 24.10.1 (kernel 6.14), and it was also 30 bit with closed laptop. But no HDR option.

RandyT_Intel · ‎01-06-2026

Hi @alex133,

Thank you for getting back to us. For continuity, please note that most Linux-based distributions already include Intel® Graphics Drivers. These drivers are provided and maintained by the Linux distribution vendors, not by Intel, I recommend reaching out to your Linux operating system vendor for Fedora support, as this issue may be resolved through a driver update.

For isolation purposes, please try running this using Ubuntu, as it is the primary distribution supported by the Intel graphics ecosystem. Please let me know if there's any difference with the reported issue when using Ubuntu.

Best regards,

Randy T.

Intel Customer Support Technician