Re: Console FB conflicts with xorg

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On Wed, 20 Apr 2016 18:57:55 -0300
Sebastián Pedersen <sebasped@xxxxxxxxxxxxxxx> wrote:

> Hi,
> 
> When I put in my grub configuration:
> 
> GRUB_GFXPAYLOAD_LINUX=keep
> 
> and consequently get framebuffer for the console, then xorg vesa
> driver not render properly, and the fbdev xorg driver stops working
> the DPMS.
> 
> But If I comment that grub line, evething works fine.
> 
> The problem is that I use a lot a framebuffer console, and also xorg.
> 
> Any ideas?
> 
> Thanks in advance.

Your best bet is going to be to build the sisfb module for your kernel.
That's usually a bit of a pain, but you're in luck, because I wanted to
figure out how to do DKMS for in-tree modules... and so I present to
you the brand new AUR package linux-sisfb-dkms [1].

Now, I don't actually have a compatible card to test it with, but it
modprobes okay so I think I did it right. Anyway, install that, ensure
it automatically loads on boot by adding it to modules-load.d, and
configure it to use the video mode you want according to the docs [2].
That'll typically be something like the following in a modprobe.d
snippet:

options sisfb mode=1024x768x32

Hope that all gets you working!

[1] https://aur.archlinux.org/packages/linux-sisfb-dkms/
[2] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/plain/Documentation/fb/sisfb.txt

~Celti

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