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Date:	Sun, 15 Jun 2014 10:57:48 +0200
From:	Geert Uytterhoeven <>
To:	Bruno Prémont <>
Cc:	Stefan Biereigel <>,
	Linux Fbdev development list <>,
	"" <>,, brian <>
Subject: Re: console / fbdev: fbcon support for bits_per_pixel = 1?

On Sat, Jun 14, 2014 at 2:35 PM, Bruno Prémont
<> wrote:
>> Is this behavior intended or are we triggering a bug here (that no one noticed, because
>> who in the world uses monochrome framebuffers these days..). I can't see any comments that
>> monochrome consoles should not work with 1 bit per pixel. See the code below if you spot
>> some errors (ignore some missing error handling and mediocre style for now, please).
> fbcon on 1bpp frambuffer worked for me with picoLCD (though I have found no userspace

I'm not aware of 1 bpp frame buffer consoles being broken.

> framebuffer application willing to operate at 1bpp).

Xfbdev does. I revived support for monochrome (and Atari/Amiga-style
bitplanes) last year.

And of course



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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