Hardware: HP Pavilion Gaming 15-ec0xxx
CPU: AMD Ryzen 5 3550H
GPU: AMD Picasso/Raven2 Vega 8 (0x1002:0x15d8) — only GPU visible in lspci, GTX 1650 absent
Kernel: 7.0.10-arch1-1
Mesa: 26.1.1-2
linux-firmware-amdgpu: 20260519
Compositor: Hyprland 0.55.2 (Wayland)
Dual boot: Windows 11 (HDMI works fine there)

Issue:
HDMI-A-1 shows disconnected at kernel level with cable plugged in.
EDID returns 0 bytes, no hotplug events in dmesg, HPD pin never fires.

Key findings:
- amdgpu_dm_disable_hpd = 0
- dc = -1 (auto), DCN 1.0 initialized fine
- connector[97]: HDMI-A-1 exists in DRM state but crtc=(null)
- ATPX Hybrid Graphics detected (functions 0x00000001) but vgaswitcheroo not registered
- GTX 1650 completely absent from lspci
- Runtime PM not available

Tried:
- echo detect > /sys/class/drm/card1-HDMI-A-1/status
- amdgpu.dc=1 amdgpu.dpm=1 kernel params
- acpi_osi=! acpi_osi=Windows 2015
- Windows Fast Startup disabled + cold shutdown
- Downgraded mesa, linux-firmware-amdgpu, kernel individually — all still broken
- Kernel tested back to 6.19.11 — all broken, no older cache available

Broken since at least 6.19.11. Was working at some point before that.

neofetch

 DISTRO ?  Arch Linux x86_64
│ ├ ?  Linux 7.0.12-arch1-1
│ ├? ?  1097 (pacman)
│ └ ?  zsh 5.9.1
 DE/WM ?  Hyprland 0.55.4 (Wayland)
│ ├? ?  Papirus-Dark [Qt], Papirus-Dark [GTK2/3/4]
│ ├ ?  Bibata-Modern-Classic (24px)
│ ├ ?  JetBrainsMono Nerd Font (9pt)
│ └ ?  foot 1.27.0
? SYSTEM ?  HP Pavilion Gaming Laptop 15-ec0xxx
│ ├? ?  AMD Ryzen 5 3550H (8) @ 2.10 GHz
│ ├? ?  AMD Radeon Vega 8 Graphics
│ ├? ?  1920x1080 @ 60Hz
│ ├? ?  3.23 GiB / 5.65 GiB (57%)
│ ├? ?  40.00 KiB / 5.65 GiB (0%)
│ ├? ?  53 mins
│ └? ?  1920x1080 in 15", 60 Hz [Built-in]

Last edited by Blaze7 (Today 10:02:57)