linux-kernel - Re: [PATCH] Revert "fbdev: Remove conflicting devices on PCI bus"

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Message-ID: <20230206155649.GA2212009@bhelgaas>
Date:   Mon, 6 Feb 2023 09:56:49 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Dave Airlie <airlied@...il.com>
Cc:     linux-fbdev@...r.kernel.org, linux-pci@...r.kernel.org,
        Helge Deller <deller@....de>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        Javier Martinez Canillas <javierm@...hat.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Zeno Davatz <zdavatz@...il.com>
Subject: Re: [PATCH] Revert "fbdev: Remove conflicting devices on PCI bus"

On Mon, Feb 06, 2023 at 06:59:40AM +1000, Dave Airlie wrote:
> On Sat, 4 Feb 2023 at 09:09, Bjorn Helgaas <helgaas@...nel.org> wrote:
> > From: Bjorn Helgaas <bhelgaas@...gle.com>
> >
> > This reverts commit 145eed48de278007f646b908fd70ac59d24ed81a.
> >
> > Zeno Davatz reported that 145eed48de27 ("fbdev: Remove conflicting devices
> > on PCI bus") caused a console hang.  The machine was actually still usable
> > via ssh, etc., but there was no activity on the console.
> >
> > Reverting 145eed48de27 for the nvidiafb on that system fixed the problem.
> >
> > Revert 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus") since
> > we don't know what caused the problem.
> 
> Why is the user using nvidiafb?

I don't know, and of course, it really doesn't matter; we shouldn't
regress a user's experience, and there's no hint to the user of where
to look for a resolution.

Thanks for working out a better fix!

Bjorn