Public Alpha Test: Audio Without Compromise - Volumio on Bookworm Begins

Volumio Development Volumio Beta Testing
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Dear Volumionauts,

@gkkpch - Thanks for raising this it’s a very helpful clue.

Lets properly investigate the reported performance drop in NAS scanning under Bookworm Alpha compared to Buster, especially when using CIFS mounts. Based on your observations, here’s what we have so far:

Baseline Comparison Request

We’d like to ask Volumionauts to help confirm:

Can you please run the following test and share your findings?

  • Install v0.063 (Bookworm, previous kernel)

  • Run a full library scan from your NAS

  • Then, repeat the same on v0.066 (current kernel)

  • Let us know:

    • Number of tracks detected per refresh
    • Any visible delay or bottleneck
    • What vers= setting you are using (if any)

Initial Observation from Your Case

You found that:

  • Mounting without vers= caused a downgrade in performance, with the mount defaulting to vers=3.11
  • Explicitly setting vers=1.0 restored the expected scan speed

This confirms a possible regression or increased overhead when using SMB 3.x defaults with kernel 6.12.x in combination with your NAS.

Why This Matters

Kernel 6.12 (and Bookworm) has updated CIFS behavior. When left to auto-negotiate, it often defaults to vers=3.11, which introduces:

  • Encrypted sessions
  • Multi-channel negotiation
  • Increased metadata overhead

These may significantly affect scan performance on:

  • Low-powered NAS systems
  • Atom-class SBCs
  • Older networking stacks

What Would Help

Try mounts with:

  • vers=3.0
  • vers=2.1
  • vers=1.0

Let’s find the boundary where speed begins to degrade.

Thanks again for putting this on our radar.

Kind Regards,