blank framebuffer console when booting

vvale · n00b Joined: 07 Dec 2006 Posts: 15

Hello

I have compiled with VESA support and VESAFB driver type. Also removed support for in-kernel nvidida drivers.

Here is my grub line:

kernel /boot/2620r7 root=/dev/hda7 vga=0x318 video=vesafb:mtrr:3,ywrap

That should be it... when I boot screen is blank before going into graphics mode. If I remove everything form vga and onwards it defaults into some low resolution mode.

What's up?

Thanks for any suggestions!

Cal · n00b Joined: 09 May 2007 Posts: 36 Location: England

kernel /boot/2620r7 root=/dev/hda7 vga=0x318 video=vesafb:mtrr:3,ywrap

I had the same problem. Get rid of the vga=0x318 and put the resolution in the vesafb options like this: video=vesafb:ywrap,mtrr:4,1024x768-16@60

Or whatever resolution, refresh rate and bit depth you want. That's how I fixed it anyway, hope it helps.

Cal

vvale · n00b Joined: 07 Dec 2006 Posts: 15

Thanks for your comments.

Text shows up when I remove vga-statement but not at the specified resolution, that is a resolution of 800x600 or something.

kernel /boot/2620r7 root=/dev/hda7 video=vesafb:mtrr:3,ywrap,1024x768-32@85

I used the following line on kernel 2618r2 and it worked then:

kernel /boot/2618genr2 root=/dev/hda7 vga=0x318 video=vesafb:mtrr:3,ywrap,1024x768-32@85

Even though the above is not correct as the manual actually says that mode line 1024x768-32@85 only works with vesafb-tng and I use vesafb because I have amd64.

So I suspect there is something missing in my kernel config...

midnite · Guru Joined: 09 Apr 2006 Posts: 451 Location: Hong Kong

when i was installing Gentoo with the minimal CD, the font was small, neat and tidy, and the most important is i can read more lines and columns in my screen. i used probably the most updated kernel - 2.6.20-r5.

In fact this is my second time i install Gentoo. In both times, i used the GRUB bootloader. Last time, i added "vga=791" in the line of kernel, and the font did shrink to the size i want (similar to the size in the minimal CD).

But this time, when i add that, reboot, my screen turns black and not even a word showing. But i can feel that the system still boot correctly. So i "blindly" went into the conf file and delete "vga=791". And reboot, then everything goes fine again, with the large ugly fonts.

Am i missing anything for this setting?

di1bert · l33t Joined: 16 May 2002 Posts: 963 Location: Oslo, Norway

Are you using plain old Vesa or the Vesa-tng driver ? Sounds like it's just a simple
problem with your bootloader configuration. Can you paste the relevant lines from
either your grub.conf or lilo.conf...

-m

midnite · Guru Joined: 09 Apr 2006 Posts: 451 Location: Hong Kong

/boot/grub/grub.conf

nixnut · Posted: Sat Jun 30, 2007 12:36 pm Post subject:

merged above three posts here.
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midnite · Guru Joined: 09 Apr 2006 Posts: 451 Location: Hong Kong

do i need to install something in order achieve this? i guess not, because my minimal install CD can do this also, but i have installed nothing.

midnite · Guru Joined: 09 Apr 2006 Posts: 451 Location: Hong Kong

midnite · Guru Joined: 09 Apr 2006 Posts: 451 Location: Hong Kong

SOLVED, by myself, searching by my own.

watch up here: http://gentoo-wiki.com/HOWTO_fbsplash

just missed to compile framebuffer support in kernel.

m0rtal · Posted: Sat Sep 29, 2007 8:35 am Post subject:

I have similar problem, but I can't fix it in no way

Here's my grub.conf: