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Hardware model detection fails due to the lack of virtual DMI device in sysfs #3770

@dee-fox

Description

@dee-fox

Which ISO version are you using?

2025-08-01

The installation log

n/a!

describe the problem

Description of the issue

Using archinstall on the following hardware (and firmware!)
Motherboard: ASRock A75M
CPU: AMD A4-3300
GPU: (the CPU above's iGPU)
RAM: 4GB
BIOS: version L2.01 [Beta] (CSM disabled, booting in EFI mode)
results in a crash due to the lack of /sys/devices/virtual/dmi (in which archinstall is trying to find vendor info)
I am as baffled as anyone should be when faced with this fact but even the fully installed system (archinstall worked after commenting out the line that tries to retrieve the system vendor) doesn't have DMI in sysfs.

Proposed solution

Gracefully return an "undefined" when DMI doesn't exist in sysfs.

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