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js72 09-13-2005 02:43 PM

Problem with debian based distros(boot resolution)
Help! I have been trying out different distros. Now im using agnula audio distribution wich is based on debian sarge. My bootup process screen resolution is something like 800x600 but im sure that i can have at least somehow 1024x768. I have tried to add line vga=791 to grub menu.lst. But then i get only blank screen. This same is with ubuntu, knoppix....

halo14 09-13-2005 02:46 PM

try vga=773

also make sure you are putting it in the correct place.. this is a kernel parameter. If you are booting a live CD or installation CD... use:

linux vga=773

js72 09-13-2005 11:04 PM

Also just black screen before x starts with this:
kernel /boot/vmlinuz-2.6.12-3-multimedia-k7 root=/dev/hda6 ro vga=773

Might there be something that i should have and is not installed?

kushalkoolwal 09-14-2005 08:32 PM

try vga=771

Dead Parrot 09-14-2005 08:52 PM

Is this a problem that only appears with Debian based distros? Do you get the 1024x768 framebuffer mode with some non-Debian based distro? If this is the case, then you probably need to recompile your kernel to get a better support for your hardware.

js72 09-15-2005 05:58 AM

Yes it seems debian based only. Fedora,Suse,Mandriva seems okay.

js72 09-19-2005 06:19 AM

debian 3.1
well debian 3.1 just works with vga=791. Could this problem in agnula be something related to frame buffer, ?

alsac 09-19-2005 09:25 AM

The blank boot screen just started happening to me. Using Sarge here. Just compiled my kernel the other day ( from and everything works extremely well except for blank boot screen. Doesn't bother me, as long as everything loads up I'm happy. By the way, I enabled framebuffer in the kernel.

I believe Debian folks tweak the kernel somewhat before they release it in the apt repertoires (sid, etch and sarge). So blank boot screens may just be something missed in the newer kernels, most debian-based distros are bleeding edge (and people still demand and update and upgrade to their systems!!!???) so they most probably have the newer kernel with this inherent blank screen on boot issue plaguing them now. hee hee.


lpd 10-03-2005 04:03 AM

This might be something with the newer kernels but anyways..
You probably have to switch over to framebuffer graphical mode instead of text mode, unless you're using a framebuffer specially tailored against your card (atifb, rivafb etc).
So you'd need to pass something like "vga=0x318" instead of "vga=791"
Partially snipped from "/usr/src/linux-source-2.6.12/Documentation/fb/vesafb.txt":

So the table for the Kernel mode numbers are:

| 640x480 800x600 1024x768 1280x1024
256 | 0x301 0x303 0x305 0x307
32k | 0x310 0x313 0x316 0x319
64k | 0x311 0x314 0x317 0x31A
16M | 0x312 0x315 0x318 0x31B
This problem had bother me for some time too. I knew that 'rivafb' could provide higher resolution consoles but I couldn't use that since I need the nvidia closed source driver for hardware 3D. Booting with VGA=ask, and then doing a "scan" would only lock up my screen.
Install the package 'boot-icons' for some extra graphic effects during boot. :)

Bremsstrahlung 10-03-2005 09:10 AM

I've had similar hokey problems with my own screen resolution. It happened to me when I put Debian on my old laptop (Dell Inspiron 8000). My resolution was stuck at something ridiculous like 600x400 and the login screen was bigger than my actual monitor size, so I had to scroll around on it. It was ridiculous. I couldn't even get the GUI higher than 800x600. The problem for me essentially came down to this: I needed to find a fairly specific h-sync and v-sync for my monitor, and manually enter my screen's possible/desired resolutions (via either xf86config or editing the files). I initially had both problems displaying the screen AT ALL and problems with my desired resolution.

I used and found my particular distro and laptop model, and looked up what problems people had and the suggested screen data. I tried this before comparing it to my own laptop specs, made what edits I needed, and it worked fine.

..Though I stlil tend to leave my login screen at 800x600, since it doesn't need to be any smaller for me. But initially,

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