615.78.08 (open): external HDMI output stays black with GPU pegged at 99-100% from the first frame under Hyprland (RTX 3050 Ti Laptop); fully resolved by downgrading to 610.57.04

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
36/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Active
Tech stack
c, linux
Domain
backend, operating-systems

Research direction

Start by comparing the reported working 610.57.04 and failing 615.78.08 behavior in the open GPU kernel module source; the issue does not identify a file, failing test, or specific subsystem. Reproduce with the listed RTX 3050 Ti, HDMI display, and Hyprland setup, then collect nvidia-bug-report.sh output from the failing state as the report offers. Done means identifying and fixing the driver regression so HDMI displays correctly and the GPU idles.

Written by the indexing model from the issue text.

Description

Describe the bug

On nvidia-open-dkms 615.78.08, the external HDMI monitor stays solid black from the very first frame of a fresh Hyprland session, while the internal laptop panel (eDP) works normally. The GPU immediately pegs to 99-100% utilization and ~87°C, held steady, with no recovery. There are no Xid errors, no NVRM errors, and no DRM/kernel error messages at all — a completely silent failure. The kernel and the compositor both believe the HDMI output is connected, enabled, and running the correct mode; only the physical picture is missing.

To Reproduce
  1. Run nvidia-open-dkms 615.78.08 with an HDMI monitor attached (hybrid Intel+NVIDIA laptop, HDMI wired to the dGPU).
  2. Boot or log into a fresh Hyprland session.
  3. External HDMI monitor shows black immediately; nvidia-smi shows GPU utilization pegged at 99-100%, power draw ~45W, temperature climbing to ~87°C and holding.

Reproduced identically across two independent fresh sessions (one from cold boot, one from a full logout/login) — not a transient glitch.

Expected behavior

External HDMI output displays normally; GPU idles when the desktop is idle.

Bisection
  • 615.78.08: broken every time, as described above.
  • 610.57.04: same kernel, same Hyprland build, no other changes — HDMI works correctly, GPU idles at ~20% util / ~62°C, Hyprland process CPU usage normal (~10%). Downgrading via pacman -U to the cached 610.57.04 package and rebooting fully resolves the issue.
System information
  • GPU: NVIDIA GeForce RTX 3050 Ti Laptop GPU (GA106M, PCI 10de:2523)
  • Driver: nvidia-open-dkms 615.78.08 (broken) / 610.57.04 (working)
  • Kernel: 7.2.8-9-omarchy (Arch-based, x86_64)
  • Compositor: Hyprland 0.56.2 (Wayland)
  • Distro: Omarchy Linux 4.0.5
  • Laptop: ASUS ROG Zephyrus M16 (GU603ZEB), hybrid Intel iGPU + NVIDIA dGPU via supergfxd (Hybrid mode), HDMI wired to the dGPU
  • External monitor: LG TV (SSCR2), 3840x2160@60

Happy to attach nvidia-bug-report.sh output from the broken (615.78.08) state if that would help — let me know and I'll reboot back onto it to capture one.

Filed by Claude Sonnet 5 via Claude Code.

Dominant language
C
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