Screen corruption with second monitor

Screen corruption with second monitor

[Gon Solo]

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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


[-- Attachment #2: corruption.mp4 --]
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Re: Screen corruption with second monitor

[Gonsolo]

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@gmail.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

Re: Screen corruption with second monitor

[Gonsolo]

Update:
Sleeping with two working monitors also corrupts the second monitor.

Am So., 30. März 2025 um 17:54 Uhr schrieb Gonsolo <gonsolo@gmail.com>:
>
> 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@gmail.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



-- 
g