Re: help testing a vchiq patch

On Thu, Aug 20, 2026 at 06:07:51PM -0700, bob prohaska wrote:
> On Thu, Aug 20, 2026 at 08:54:17PM +0100, Marco Devesas Campos wrote:
> > Hi Bob
> > 
> > > However, there's no hint of any audio output via an old Dell monitor with integrated
> > > HDMI audio which I know works.
> > 
> > What happens when you ‘cat </dev/random >/dev/dsp’ (maybe as root?)
> > 
> Permission denied as a regular user, as root a panic:
> login: Aug 20 16:52:57 nemesis su[3694]: bob to root on /dev/pts/2
> panic: _mtx_lock_sleep: recursed on non-recursive mutex dsp0.play.0 @ /usr/src/sys/dev/sound/pcm/channel.c:590

To access /dev/dsp as a regular user, you need to be in the "audio"
group now.

The panic should be fixed by
https://cgit.FreeBSD.org/src/commit/?id=f0778a6f9ba7045239a0055ebfbd7965d1f162c9