Re: Dell OptiPlex 5080: `Unstable LPIB (352800 >= 176400); disabling LPIB delay counting`

[Paul Menzel <pmenzel@xxxxxxxxxxxxx>]

Dear Takashi,


Thank you very much for the prompt response.


Am 28.06.24 um 13:45 schrieb Takashi Iwai:
> On Fri, 28 Jun 2024 13:11:18 +0200, Paul Menzel wrote:

> > On a Dell OptiPlex 5080/032W55, BIOS 1.17.1 12/18/2022 Linux 6.6.12
> > and 6.6.35 sometimes log (`sound/pci/hda/hda_intel.c`):
> >
> >      snd_hda_intel 0000:00:1f.3: Unstable LPIB (352800 >= 176400); disabling LPIB delay counting
> >
> > Is there a problem with the system? The value seems exactly double of
> > the limit.
>
> It was about the PCM position reporting and the hardware report is
> somewhat flaky,

Excuse my ignorance. When does the position need to be reported. 
Continuously or only if the sound card is in use?

> so the driver gave up to take the LPIB register value for delay
> calculation.
I looked through the logs of our Dell desktops and found some of this 
line from over three years ago, and only a few from 2023 and 2024. What 
I noticed is, that some happened during the night, when the users were 
not working in front of the system.

    /var/log/messages.2024-05:2024-05-03T21:38:40.548614+02:00 
fenchurch kernel: [1243538.698524] snd_hda_intel 0000:00:1f.3: Unstable 
LPIB (352800 >= 176400); disabling LPIB delay counting
    /var/log/messages:2024-06-22T17:53:02.705160+02:00 fenchurch 
kernel: [91380.287519] snd_hda_intel 0000:00:1f.3: Unstable LPIB (352800 
>= 176400); disabling LPIB delay counting
    /var/log/messages:2024-06-26T22:16:53.731007+02:00 fenchurch 
kernel: [15864.501200] snd_hda_intel 0000:00:1f.3: Unstable LPIB (352800 
>= 176400); disabling LPIB delay counting

From a Dell Precision Tower 3620/0MWYPT, BIOS 2.11.1 08/17/2018:

    /var/log/messages:2024-06-25T01:43:44.172792+02:00 freddie kernel: 
[58525.565008] snd_hda_intel 0000:00:1f.3: Unstable LPIB (349592 >= 
176400); disabling LPIB delay counting

> The position itself is reported by other ways, hence it's no serious
> issue and in most cases you can ignore it.
I ask to know, if I should contact Dell to fix something before systems 
run out of warranty.


Kind regards,

Paul