-------- Original Message -------- Subject: Re: Suppress all boot output (framebuffer?) - embedded linux distro Date: Tue, 19 Feb 2013 22:52:25 +0100 From: Ivan Nikolaev <voidexp@gmail.com> To: Mulyadi Santosa <mulyadi.santosa@gmail.com> On Tue 19 Feb 2013 08:00:52 PM CET, Mulyadi Santosa wrote:

On Tue, Feb 19, 2013 at 8:50 PM, Ivan Nikolaev <voidexp@gmail.com> wrote:

...

I'm developing an ubuntu 12.04 (LTS) based embedded distribution, which basically is a normal ubuntu stripped down to bare minimal packages, which runs a minimal XOrg server with one single full-screen application. What I want is to suppress every single char of console output since the bootloader passed control to the kernel, and possibly show instead of that some static text and/or image. What I thought is to try to disable printk-s and to write some kind of patch which uses the framebuffer to show the logo. Is that possible/difficult? Can you eventually explain where I should dig?

IIRC, isn't that what ubuntu 12.04 does during boot stage by default ? i mean, no boot message shown....

Yes, I guess Ubuntu version of GRUB is slightly modified, and it uses Plymouth to provide that "nice" (and buggy on some machines) graphic bootsplash. What I need is to avoid virtual consoles at all, also, I need one static image visualized by framebuffer, which then smoothly passes to my GUI app. Even more, being my app Qt based, I think about throwing away the Xorg server and use Qt's support for framebuffer. So, it will probably do a nice job. Hope I've explained what I need. For example, on Android devices how this thing is done? You turn on the device, and then the loading animation is displayed for a while. Everything goes smooth, no glitches, and I suppose, there's no Plymouth :)