Bug 1222341

Created attachment 874081 [details]
dmesg-2024-04-04-reboot

On the LCD deck with official steam dock, reboot will fail to connect to the TV. 

TV - KDL-46Z5100 Sony Bravia
Official Steam dock
LCD Steam deck

Steps to reproduce
1. Plug in the lcd steam deck with official dock
2. Plugin TV with HDMI
3. Reboot
4. The external screen will say no signal

Information for package plasma6-mobile:
---------------------------------------
Repository     : openSUSE-Tumbleweed-Oss
Name           : plasma6-mobile
Version        : 6.0.3.1-1.1
Arch           : x86_64
Vendor         : openSUSE
Installed Size : 5.8 MiB
Installed      : Yes
Status         : up-to-date
Source package : plasma6-mobile-6.0.3.1-1.1.src
Upstream URL   : https://www.kde.org/
Summary        : Plasma shell for mobile devices
Description    : 
    Plasma shell for mobile devices.


Operating System: openSUSE Tumbleweed 20240403
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.3
Kernel Version: 6.8.2-1-default (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Custom APU 0405
Memory: 13.5 GiB of RAM
Graphics Processor: AMD Custom GPU 0405
Manufacturer: Valve
Product Name: Jupiter
System Version: 1

Bios version -  Version: F7A0120

Observations

card1-Writeback-1 appears.

Both card1-DP-1 and card1-Writeback-1 are empty edid files.

```
find /sys -name edid
/sys/devices/pci0000:00/0000:00:08.1/0000:04:00.0/drm/card1/card1-Writeback-1/edid
/sys/devices/pci0000:00/0000:00:08.1/0000:04:00.0/drm/card1/card1-eDP-1/edid
/sys/devices/pci0000:00/0000:00:08.1/0000:04:00.0/drm/card1/card1-DP-1/edid
```

```
[   43.768121] amdgpu 0000:04:00.0: [drm] enabling link 1 failed: 15
```