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From: Lukas Wunner <lukas@wunner.de>
To: Hans de Goede <hdegoede@redhat.com>
Cc: "Rafael J . Wysocki" <rafael@kernel.org>,
	Len Brown <lenb@kernel.org>, Aditya Garg <gargaditya08@live.com>,
	Mark Gross <mgross@linux.intel.com>,
	linux-acpi@vger.kernel.org, Andy Shevchenko <andy@infradead.org>,
	platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH 0/3] ACPI: video/apple-gmux: Improve apple-gmux backlight detection
Date: Mon, 23 Jan 2023 13:09:00 +0100	[thread overview]
Message-ID: <20230123120900.GA1924@wunner.de> (raw)
In-Reply-To: <20230123113750.462144-1-hdegoede@redhat.com>

On Mon, Jan 23, 2023 at 12:37:47PM +0100, Hans de Goede wrote:
> Some apple laptop models have an ACPI device with a HID of APP000B
> and that device has an IO resource (so it does not describe the new
> unsupported MMIO based gmux type), but there actually is no gmux
> in the laptop at all.
> 
> This patch-series improves the drivers/acpi/video_detect.c so that
> it no longer tries to use the non present gmux in this case.
> 
> Note I'm still waiting for testing feedback from the reporter of
> this problem. But from the logs the problem is clear
> (the logs show: "apple_gmux: gmux device not present")

Please provide a link to the original report.  I would also like to
know the exact MacBook model used and I would like to see full dmesg
output as well as an acpidump.

What you're saying here is that there's a fake APP000B device present
in DSDT and I have a hard time believng that.  We need to find out
what's really going on and how macOS handles this.

Thanks,

Lukas

  parent reply	other threads:[~2023-01-23 12:14 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-23 11:37 [PATCH 0/3] ACPI: video/apple-gmux: Improve apple-gmux backlight detection Hans de Goede
2023-01-23 11:37 ` [PATCH 1/3] platform/x86: apple-gmux: Move port defines to apple-gmux.h Hans de Goede
2023-01-23 11:37 ` [PATCH 2/3] platform/x86: apple-gmux: Add apple_gmux_detect() helper Hans de Goede
2023-01-23 13:49   ` Lukas Wunner
2023-01-23 14:13     ` Hans de Goede
2023-01-23 14:23       ` Lukas Wunner
2023-01-23 15:05         ` Hans de Goede
2023-01-23 15:10           ` Hans de Goede
2023-01-23 16:35   ` Andy Shevchenko
2023-01-23 11:37 ` [PATCH 3/3] ACPI: video: Fix apple gmux detection Hans de Goede
2023-01-23 16:37   ` Andy Shevchenko
2023-01-23 17:25     ` Hans de Goede
2023-01-23 19:20   ` Rafael J. Wysocki
2023-01-23 12:09 ` Lukas Wunner [this message]
2023-01-23 12:38   ` [PATCH 0/3] ACPI: video/apple-gmux: Improve apple-gmux backlight detection Hans de Goede
2023-01-23 13:58     ` Lukas Wunner
2023-01-23 15:05       ` Hans de Goede
2023-01-23 14:53 ` Aditya Garg
2023-01-24  8:21   ` Orlando Chamberlain
2023-01-24 10:26     ` Aditya Garg

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