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Could not use HDMI on my laptop
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Joined: 18 May 2022
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PostPosted: Wed May 18, 2022 4:40 am    Post subject: Could not use HDMI on my laptop Reply with quote

I have a laptop with i7-12700H and RTX 2050, maybe with only a single VGA controller connected with iGPU and both the internal screen of my laptop and an HDMI port. `lspci | grep -iE "vga|3d"` shows:

```
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-P Integrated Graphics Controller (rev 0c)
01:00.0 3D controller: NVIDIA Corporation GA107M [GeForce RTX 2050] (rev a1)
```

The HDMI port works well while using windows and while booting Linux (for example, under grub). However, once `i915` driver is loaded, the external screen becomes black and complains "no signal". Also, I noticed that if I uninstall the intel graphic driver on windows, HDMI will become not work too.

This is my kernel log: https://fars.ee/gQTL this is my kernel config: https://fars.ee/XurM

I also have two type-c interfaces capable to output video on my laptop and it works fine. `xrandr` could detect these two type-c port but not the HDMI one. After connecting a screen to one of the type-c interfaces, `xrandr` shows: https://fars.ee/y0UX

Could anyone figure out where is the problem?
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