nod32

I recently installed ubuntu and am dual booting it with xp. At times during bootup (before and after grub bootloader) my monitor shows me a flickering "out of range" message. It shows resolution, and vertical/horizontal frequencies, but I cant see what they are because its flickering so fast.

Anyway, i was reading up on google about this but it never gets resolved. I have no options to change this in bios. Theres only one option about video, and that if i want it in vga, cga40, cga80 or mono. Theres no options on my monitor to change anything like that either.

Is there any way I can force the refresh rate, or resolution during bootup?

thanks,
nod32

zeke_mo

I had this problem with my server when I first installed it; this might not be an option but put a better quality monitor on the computer and then turn down the settings, then reboot with the other monitor. Im not that familiar with linux so you will have to wait for a more technical answer

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nod32

Do you mean trying to turn down the settings in bios? Because my moniter is fine once i get in there. This wouldn't be such a problem, but ever since I installed ubuntu check disk always comes up when I boot XP. And once it finishes it just sits there and I have to restart.

Since I cant see the screen booting up, I have to sit there hitting space bar to skip check disk so I can boot up normally. But thats a whole nother issue...

zeke_mo

oooo i see, so you monitor doesnt support boot resolutions? Never heard of that before

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LeeJend

Lets get this straight:

Can you see the bios screens and the POST screen?

Are you using on board video or a card?

Once XP is up is the resolution ok?

Sounds like the Ubuntu drivers are requesting a resolution that is too high. You might be able to modify the Ubuntu start up files to request a lower resolution.

This post really belongs in the Linux section where someone who knows the details should be able to help you. It's not a hardware issue if the POST screen is visible. The OS (Ubuntu or XP) sets the video rates.

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nod32

I cant see the post screen. Thats the only part I cant see. I see grub, select my os, and then I loose the image until the xp logon screen. Resolution in Xp and ubuntu is perfect. Thats why i posted in hardware section, because once the os is up and running everything is fine.

Im using an ati radeon 7200.

j79zlr

Since it is happening before X and after post, you must have a misconfigured video range in your grub menu.lst file.

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nod32

How would i go about changing that?

LeeJend

Try setting the menu line in menu.lst to:

As a suggestion, find the line that begins with "# defoptions" and append this to it:

Code:

vga=0x316 resume=/dev/hda2


http://ubuntuforums.org/showthread.php?t=188736

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nod32

should i put it under defoptions=quiet splash or replace it?
sorry, im really new to linux..

j79zlr

No, that is not the problem. It would be the vga= line, but Ubuntu has so many quirks with its config file handling, I am not sure how to help and it will automatically overwrite your config files without user intervention [my main pet peeve with Ubuntu].

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LeeJend

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=vga=0x316 resume=/dev/hda2

Change as above. You don't need the splash setting.

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ShepsCrook

nm, I was reading it as something else. Good luck with fixing it.

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nod32

still no luck
i saved menu.lst as root then ran sudo update-grub and restarted, but still nothing.

thanks for your responses