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[Charles <2127250@xxxxxxxxxxxxxxxxxx>]

I'm tentatively reassigning this to the kernel. I reproduced this using
VMware Workstation on Windows 11 (what a nightmare figuring out to
download that product from Broadcom was!) It's nearly unusable.
Everything feels very laggy and uses a lot more CPU than I'd expect.

The audio is super laggy, but so is gnome-shell. If you move a terminal
window around for instance, it can easily start pegging the CPU. I see
in the journal several messages about firmware bugs, but I'm unsure how
serious they are. There's also kernel faults, some worringly from
do_mmap, which makes me think it's a kernel problem. I also see
kworker's dominating `top` output often, which is unusual.

I tried bumping the number of CPUs and memory up, disabled / enabled 3D
acceleration, disabling side-channel mitigations, and so forth, but
nothing I did so far changed behaviour.

Will see if I get better performance using 24.04 to confirm the
regression.

** Package changed: pipewire (Ubuntu) => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/2127250

Title:
  Severe Performance Lag on 25.10 Live CD in VirtualBox and VMware
  Workstation on Windows 11 hosts

Status in linux package in Ubuntu:
  New

Bug description:
  Currently in 25.10 there is so much audio stuttering that it makes using Orca completely unusable.
  I was setting up a VM for testing 25.10 and noticed this in both Virtual Box and VM Ware. I thought this was odd so I created vms for 24.04 on both platforms as well.
  In 24.04 there is essentially no stuttering and Orca is usable. In 25.10, however, you can't really understand anything Orca is saying as it is far too choppy.
  I'm mainly testing the installer but it does also seem like this is happening on the actual desktop as well.

  I'm running my VMs on Windows 11 and dedicating 16gb of ram and 4
  cores with 2 threads each to each VM. I'm happy to provide a video or
  anything else that can help narrow down where this issue is coming
  from.

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