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From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Duff OMelia <duff@omelia.org>
Cc: westeri@kernel.org, andreas.noever@gmail.com,
	YehezkelShB@gmail.com, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org, imre.deak@intel.com
Subject: Re: [RFC PATCH] thunderbolt: Tunnel only the first DP OUT of Apple Studio Displays
Date: Mon, 9 Nov 2026 11:30:39 +0100	[thread overview]
Message-ID: <20261109103039.GK176724@black.igk.intel.com> (raw)
In-Reply-To: <20261106154445.517940-1-duff@omelia.org>

Hi,

On Fri, Nov 06, 2026 at 10:44:45AM -0500, Duff OMelia wrote:
> An Apple Studio Display presents its 5K panel as a 2x1 tile over two DP
> OUT adapters. The first tile's connector offers the full 5120x2880 mode,
> which the xe driver on my host drives over a single stream. The second
> tile's connector offers only 2560x2880, and nothing uses it there.

Thanks for the report! We have had problems debugging this because we have
had no access to this particular monitor.

I think we should investigate if we can do better here in terms of
graphics.

Can you provide full dmesg with thunderbolt.dyndbg=+p and drm.debug=0x10e
in the kernel command line when you have everything connected and the issue
reproduces?

      reply	other threads:[~2026-11-09 10:30 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-06 15:44 Duff OMelia
2026-11-09 10:30 ` Mika Westerberg [this message]

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