linux-kernel - Re: Screen corruption with second monitor

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Message-ID: <CANL0fFSUCiedt_V91bmEdDYnqo_DgkptgmYMUAWZPePM2sWzvg@mail.gmail.com>
Date: Sun, 30 Mar 2025 17:54:38 +0200
From: Gonsolo <gonsolo@...il.com>
To: lyude@...hat.com, dakr@...nel.org, airlied@...il.com, simona@...ll.ch, 
	dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: Screen corruption with second monitor

Hi!

Second try without attachment.
Youtube link of screen: https://youtu.be/zVbuzxECinI

Am So., 30. März 2025 um 17:30 Uhr schrieb Gon Solo <gonsolo@...il.com>:
>
> Hi!
>
> I bought a Displayport-to-HDMI cable to connect a second monitor to my
> NVIDIA 3060 12GB with three Displayport and one HDMI outputs.
> The first monitor is connected via the only HDMI output.
> The (second) monitor via on DP-HDMI flickers and has vertical stripes (see the
> attached video). I'm running the latest Arch with Nouveau and NVK.
> The first monitor is attached via
> Kernel 6.13.8-arch1-1
> Mesa 25.0.2
>
> I think it's the driver's fault because
> a) console works, flickering starts with the graphical console,
> b) on Windows it works,
> c) with NVIDIA (nvidia-open, nvidia-utils) drivers it works,
> d) booting with just the second monitor (Displayport-HDMI) works, and
> e) funny enough, booting with just the second monitor, and plugging in the first one
> later also works.
>
> So my guess would be, there's something not working with Nouveau's handling of
> the second screen.
>
> I'm happy to provide more details on request.
>
> Cheers,
> Andreas

-- 
Andreas