[fedora-arm] Re: Raspberry Pi 4B+ testing

On 10/23/24 2:39 PM, Troy Dawson via arm wrote:
> On Wed, Oct 23, 2024 at 12:16 PM Brandon Nielsen via arm
> <arm@lists.fedoraproject.org <mailto:arm@lists.fedoraproject.org>> wrote:
>
> Hi all,
>
> I just noticed on my Pi 4B+ that display output on the second micro
> HDMI
> port (the one further from the USB-C power supply port) is corrupted.
> The first port is fine.
>
> The corruption is visible as rainbow halos around text during boot, and
> increasingly large areas of corruption after booting to a graphical
> desktop (green dots, color shifts, etc.).
>
> I can confirm this with the Fedora 41 1.3 RCs for both KDE and
> Workstation.
>
> Has anyone else seen this? I'm trying to rule out it just being a
> hardware fault with my unit.
>
> Brandon Nielsen
>
>
> I can confirm that, and thank you very much.
> I had pulled an old monitor off a shelf to test and thought I was having
> monitor problems.
> I read your email, switched display ports on my rpi4b, and now it's working.
>
> Troy Dawson
>
>

Oddly, I cannot make this happen consistently. My last 2 boots have been
fine on either port. When things are "fine", I can also move the cable
between ports with no issues.

So far the only thing I have noticed is:

"fedora kernel: vc4-drm gpu: swiotlb buffer is full (sz: 1146880 bytes),
total 32768 (slots), used 938 (slots)"

(and similar) appearing intermittently in the logs when the monitor is
misbehaving.
--
_______________________________________________
arm mailing list -- arm@lists.fedoraproject.org
To unsubscribe send an email to arm-leave@lists.fedoraproject.org
Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/
List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
List Archives: https://lists.fedoraproject.org/archives/list/arm@lists.fedoraproject.org
Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue