Re: Early boot became slower

[Sven Joachim <svenjoac@gmx.de>]

On 2017-01-24 17:13 +0100, Mattia Oss wrote:

> since linux-image-4.8.0-2-amd64 the early phase of my booting process
> became slower (~10 secs). I think that it has to do with the
> framebuffer. This is the only relevant difference in dmesg:
>
> 4.8.0-1-amd64:
> simple-framebuffer simple-framebuffer.0: framebuffer at 0xe0000000, 0x7e9000 bytes, mapped to 0xffffc1e201000000
> simple-framebuffer simple-framebuffer.0: format=x8r8g8b8, mode=1920x1080x32, linelength=7680
> simple-framebuffer simple-framebuffer.0: fb0: simplefb registered!
> fb: switching to radeondrmfb from simple
>
> 4.9.0-1-amd64:
> vesafb: framebuffer at 0xe0000000, mapped to 0xffffb23701800000, using 8128k, total 8128k
> vesafb: mode is 1920x1080x32, linelength=7680, pages=0
> vesafb: scrolling: redraw
> vesafb: Truecolor: size=0:8:8:8, shift=0:16:8:0
> fb: switching to radeondrmfb from VESA VGA
>
> I see that CONFIG_FB_SIMPLE is not set anymore. Is that a reason for
> that?

Apparently the handover to the KMS framebuffer from simplefb does not
work for all drivers[1].

> Any way to fix this without recompiling?

Try not to load vesafb in the first place.  Which bootloader do you use?

Cheers,
       Sven


1. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=822575