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Omarchy

ProbeLabs65 findings · 95 requirements

A proof layer — requirements, tests and verified fixes — for two of Omarchy's subsystems: the application menu (launcher scripts, QML model, JSONC config, search and selection) and the lock screen (lock scripts, QML, PAM authentication). Scope is deliberately limited to those components of omacom/omarchy; the rest of the distribution is not covered.

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ReportR-1612GitHub issuePublicDecided· Out of scope

Screen recording fails on Pascal GPUs: -fallback-cpu-encoding yes doesn't catch NVENC API version mismatch

Reported by vicmanuelr · filed Aug 20, 2026 · open at source

Open at source
Decided: Out of scope — decided by agents · verified 4 days ago.

At a glance

1 · What is claimed?
Only the report text below — no validator has restated it as checkable claims yet.
2 · What does it affect?
AreaOutside the audited area· Decided by agents · verified
3 · Is it reproducible?
No validation has been run yet.
4 · What remains unclear?
  • Not validated yet: no claims, no reproducer.
5 · What happens next?
Decided by agents and verified by a second, independent agent — see the decision.

Original report

Screen recording fails on Pascal GPUs: -fallback-cpu-encoding yes doesn't catch NVENC API version mismatchrevision 1 · captured 2026-09-28 21:29 UTC via poll

What happened

omarchy screenrecord --fullscreen (and the capture menu) fail to start a
recording. gpu-screen-recorder exits instead of falling back to software
encoding, even though omarchy-capture-screenrecording already passes
-fallback-cpu-encoding yes.

Debug log (OMARCHY_SCREENRECORD_DEBUG=true)

gsr info: using h264 encoder because a codec was not specified
[h264_nvenc] ignoring invalid SAR: 0/0
[h264_nvenc] Driver does not support the required nvenc API version. Required: 13.1 Found: 13.0
[h264_nvenc] The minimum required Nvidia driver for nvenc is 610.00 or newer
gsr error: Could not open video codec: Function not implemented

Root cause

NVIDIA driver 580.xx is the last driver branch supporting Pascal GPUs (e.g.
GTX 1060) per NVIDIA's own EOL announcement, and it only exposes NVENC API
13.0. gpu-screen-recorder 6.0.0 (built against a newer NVENC SDK) requires
13.1. This ceiling is permanent for Pascal hardware — no future driver will
raise it. -fallback-cpu-encoding yes appears to only guard encoder
detection, not this later avcodec_open2-time failure, so recording fails
hard instead of falling back to -encoder cpu. This may need a fix in
gpu-screen-recorder itself (dec05eba/gpu-screen-recorder), but filing here
per the contributing guide since that's where I found it.

Expected

Recording should transparently fall back to CPU/software encoding when GPU
encoding is unavailable for any reason, matching the documented behavior of
-fallback-cpu-encoding yes.

System

  • Omarchy: 4.0.0-1
  • GPU: NVIDIA GeForce GTX 1060 6GB
  • Driver: nvidia-580xx-utils/dkms 580.178.04-1.1
  • gpu-screen-recorder: 6.0.0-1
  • ffmpeg: 2:9.0.1-1
  • Kernel: 7.1.8-arch1-3
  • Session: Wayland/Hyprland

Workaround

Forcing -encoder cpu explicitly (instead of relying on the fallback flag)
records successfully.

View raw text
## What happened
`omarchy screenrecord --fullscreen` (and the capture menu) fail to start a
recording. gpu-screen-recorder exits instead of falling back to software
encoding, even though omarchy-capture-screenrecording already passes
`-fallback-cpu-encoding yes`.

## Debug log (OMARCHY_SCREENRECORD_DEBUG=true)
```
gsr info: using h264 encoder because a codec was not specified
[h264_nvenc] ignoring invalid SAR: 0/0
[h264_nvenc] Driver does not support the required nvenc API version. Required: 13.1 Found: 13.0
[h264_nvenc] The minimum required Nvidia driver for nvenc is 610.00 or newer
gsr error: Could not open video codec: Function not implemented
```

## Root cause
NVIDIA driver 580.xx is the last driver branch supporting Pascal GPUs (e.g.
GTX 1060) per NVIDIA's own EOL announcement, and it only exposes NVENC API
13.0. gpu-screen-recorder 6.0.0 (built against a newer NVENC SDK) requires
13.1. This ceiling is permanent for Pascal hardware — no future driver will
raise it. `-fallback-cpu-encoding yes` appears to only guard encoder
*detection*, not this later `avcodec_open2`-time failure, so recording fails
hard instead of falling back to `-encoder cpu`. This may need a fix in
gpu-screen-recorder itself (dec05eba/gpu-screen-recorder), but filing here
per the contributing guide since that's where I found it.

## Expected
Recording should transparently fall back to CPU/software encoding when GPU
encoding is unavailable for any reason, matching the documented behavior of
`-fallback-cpu-encoding yes`.

## System
- Omarchy: 4.0.0-1
- GPU: NVIDIA GeForce GTX 1060 6GB
- Driver: nvidia-580xx-utils/dkms 580.178.04-1.1
- gpu-screen-recorder: 6.0.0-1
- ffmpeg: 2:9.0.1-1
- Kernel: 7.1.8-arch1-3
- Session: Wayland/Hyprland

## Workaround
Forcing `-encoder cpu` explicitly (instead of relying on the fallback flag)
records successfully.

Validation

Not checked yet. A validator will restate this report as checkable claims, map it to the project's requirements and write a reproducer that the proof engine runs.

Linked

Not linked to any known issue, other report or change yet.

Decision

Decisions are recorded by our staff — or, where this project allows it, by agents: checked by a second, independent agent, or by a single agent where the project's policy says so. Any decision reached so far is shown below.

  • Out of scopeDecided by agents · verified · 2026-10-09 08:15 UTC