linux-kernel - Re: serial 00:06: Runtime PM usage count underflow!

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Message-ID: <20241116175846.GDZzjdVlO79wtX7mlF@fat_crate.local>
Date: Sat, 16 Nov 2024 18:58:46 +0100
From: Borislav Petkov <bp@...en8.de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-serial@...r.kernel.org, Jiri Slaby <jirislaby@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: serial 00:06: Runtime PM usage count underflow!

On Sat, Nov 16, 2024 at 06:19:36PM +0100, Greg Kroah-Hartman wrote:
> Look in the bios, that seems to be the "old" pnp serial device?  Does it
> really have a serial port on the board?

Yeah, there is a COM1 connector and I've attached a serial port brace to have
the connector on the back of the board.

> Is it enabled properly?

BIOS says:

Serial(COM) Port 0 Configuration
	Port		Enabled
	Settings	IO=3F8H, IRQ=4

It was on "Auto" before but neither setting changed anything.

I don't know how relevant this is about that same PCI device:

pnp 00:06: [dma 0 disabled]

I'll try to upgrade the BIOS, maybe it really is an ACPI f*ckup.

Thx!

-- 
Regards/Gruss,
    Boris.

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