## What happened

Running `omarchy-install-gaming-geforce-now` on an aarch64 machine with 16 KiB host pages crashes `/usr/bin/FEX` with SIGABRT before GeForce NOW is installed.

The script downloads NVIDIA's x86-64 `GeForceNOWSetup.bin` to `/tmp`, makes it executable, and runs it directly. The enabled host `FEX-x86_64` binfmt registration redirects execution to `/usr/bin/FEX`, which cannot run in this host-page-size environment. The same direct-execution path is present in the current upstream script.

## Steps to reproduce

1. Use an aarch64 Omarchy machine with 16 KiB host pages and enabled FEX binfmt registration.
2. Run `omarchy-install-gaming-geforce-now`.
3. The installer aborts through FEX; no GeForce NOW application is installed.

## Expected behavior

The installer should detect this unsupported execution environment and show a clear error instead of launching an incompatible binary. If a supported ARM/microVM installation path exists, use that path instead. I have not tested GeForce NOW inside muvm and am not claiming it works there.

## Environment

- Omarchy: `4.0.3rc4-1`
- Distribution: Arch Linux ARM
- Kernel: `7.1.12-2-12.2-sep-ARCH`
- Hardware: Apple M2 Max
- Architecture: `aarch64`
- Host page size: `16384` (`getconf PAGESIZE`)
- FEX-Emu: `2604-1`, from `asahi-alarm`
- muvm: `0.6.0-1`
- Flatpak: `1:1.18.4-1`

## Diagnostics

Two installer attempts on 2026-10-08 at 14:39:36 and 14:44:13 CEST produced the same SIGABRT stack. The recorded command line was:

```text
/usr/bin/FEX ./GeForceNOWSetup.bin ./GeForceNOWSetup.bin
```

The core contains one thread, with these relevant frames:

```text
abort
__gnu_cxx::__verbose_terminate_handler()
std::terminate()
__cxa_allocate_exception
operator new(unsigned long)
FEX + 0x1d7980
FEX + 0x1d5bd0
FEX + 0x91e38
```

A direct diagnostic `FEX --help` also aborted with:

```text
<jemalloc>: Unsupported system page size
terminate called without an active exception
```

`FEX-x86_64` binfmt registration is enabled, uses `/usr/bin/FEX`, and has flags `POCF`. The downloaded installer is an x86-64 ELF. About 50 GiB of memory was available when checked, no kernel OOM kill was recorded, and address-space/data limits were unlimited.

Standard diagnostics were collected using `/usr/bin/omarchy-debug --no-sudo --print`; only relevant system details are included here. No core files, private process environment, or full journal are attached.

## Scope and related reports

FEX's page-size limitation is already documented at https://asahilinux.org/docs/sw/broken-software/ and discussed in https://github.com/asahi-alarm/PKGBUILDs/issues/2. This report concerns Omarchy's installer invoking that unsupported direct-host path, not a request for FEX to support 16 KiB pages.

Related: https://github.com/omacom/omarchy/issues/8645 concerns architecture/package-availability checks in install menus, but does not cover this NVIDIA installer/FEX abort.

Filed by GPT-6.1 Sol via GitHub Copilot CLI.