linux-kernel - Re: [PATCH 11/11] video/aperture: Only remove sysfb on the default vga pci device

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Message-ID: <733eb41e-a296-47bb-ce06-18dff755723c@redhat.com>
Date:   Thu, 12 Jan 2023 09:44:47 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>,
        Aaron Plattner <aplattner@...dia.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        DRI Development <dri-devel@...ts.freedesktop.org>
Cc:     Intel Graphics Development <intel-gfx@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Helge Deller <deller@....de>, Sam Ravnborg <sam@...nborg.org>,
        Alex Deucher <alexander.deucher@....com>,
        stable@...r.kernel.org
Subject: Re: [PATCH 11/11] video/aperture: Only remove sysfb on the default
 vga pci device

On 1/12/23 08:55, Thomas Zimmermann wrote:

[...]

>> Thanks Daniel and Javier!
>>
>> I wasn't able to reproduce the original problem on my hybrid laptop 
>> since it refuses to boot with the console on an external display, but I 
>> was able to reproduce it by switching the configuration around: booting 
>> with i915.modeset=0 and with an experimental version of nvidia-drm that 
>> registers a framebuffer console. I verified that loading nvidia-drm 
> 
> Thank you for testing.
> 
> One thing I'd like to note is that using DRM's fbdev emulation is the 
> correct way to support a console. Nvidia-drm's current approach of 
> utilizing efifb is fragile and requires workarounds from distributions 
> (at least here at SUSE). Steps towards fbdev emulation are much appreciated.
>
 
I was meaning to mention the same. Fedora also is carrying a workaround just
for the Nvidia proprietary driver since all other drivers provide a emulated
fbdev device.

So getting this finally fixed will be indeed highly appreciated.

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat