linux-kernel - Re: cirrusdrmfb broken with simplefb

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Message-ID: <CANq1E4Q3KiLMC-ETFs+FAmTv3yWdCyqG2c+KzGFX4xZmcxLbJg@mail.gmail.com>
Date:	Thu, 19 Dec 2013 11:46:51 +0100
From:	David Herrmann <dh.herrmann@...il.com>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
Cc:	Ingo Molnar <mingo@...nel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Takashi Iwai <tiwai@...e.de>,
	Stephen Warren <swarren@...dotorg.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: cirrusdrmfb broken with simplefb

Hi

On Thu, Dec 19, 2013 at 1:03 AM, One Thousand Gnomes
<gnomes@...rguk.ukuu.org.uk> wrote:
>> > That bug always existed, simplefb is just the first driver to hit it
>> > (vesafb/efifb didn't use resources). I'm aware of the issue but as a
>> > workaround you can simply disable CONFIG_X86_SYSFB. That restores
>> > the old behavior.
>>
>> This looks like a regression, so we'll either need a fix or we'll have
>> to mark CONFIG_X86_SYSFB as CONFIG_BROKEN.
>
> Kernel bugzilla has entries for simplefb breaking both vesafb and matrox
> mga.

Thanks for the hints. I've read through all I could find and tried to
provide some help.

I'm kind of confused, most of them enable CONFIG_X86_SYSFB (which is
'n' by default) but don't read the help text. I did my best to tell
people that this option requires CONFIG_FB_SIMPLE, but if you don't
read the help-text you won't notice that. Don't know what to do about
that..

Thanks
David
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