firewire_ohci stops under moderate load

[Rick Sayre]

This began in 6.5.0-27 afaict, and is very noticeable in 6.5.0-28
Using snd_dice to playback audio, doing anything else, even just scrolling in firefox or launching this bug report, causes the firewire driver to quit:

Apr 23 12:48:53 Konnekt kernel: firewire_ohci 0000:01:00.0: DMA context IT0 has stopped, error code: evt_timeout

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-modules-extra-6.5.0-28-generic 6.5.0-28.29~22.04.1
ProcVersionSignature: Ubuntu 6.5.0-28.29~22.04.1-generic 6.5.13
Uname: Linux 6.5.0-28-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: LXQt
Date: Tue Apr 23 13:08:53 2024
Dependencies:
 linux-modules-6.5.0-28-generic 6.5.0-28.29~22.04.1
 wireless-regdb 2022.06.06-0ubuntu1~22.04.1
InstallationDate: Installed on 2023-10-31 (175 days ago)
InstallationMedia: Lubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809)
SourcePackage: linux-hwe-6.5
UpgradeStatus: No upgrade log present (probably fresh install)

[Rick Sayre (whorfin)]

Update: this is strangely related to nouveau
On a machine with a "NVIDIA MCP89 [GeForce 320M]" the nvidia drivers have been removed from 22.04. nouveau when run normally now causes a hang [see other reports if curious]

The described "firewire_ohci quits when using firefox" happens when kernel launched with kernel flag
nomodeset

When launched, instead, with
nouveau.noaccel=1

...normal usage does not affect firewire_ohci, as expected and desired