Fedora core 4 screen resolution issue on Dell-Inspiron 600m

[gtoe]

Background:
I setup Fedora Core 4 and everything installed fine. However when I went through the initial install I chose the default LCD screen with screen resolution 1024x768. I am trying to change the screen resolution to 1280x1024, but it will not accept the setting... I know the machine can handle it, because I actually bought 2 of the same model and works great on the other one. But for the one that works, at install I had chosen the 1280x1024 res. Both have the ATI Radeon Mobility M9.

The real issue:
I found in the Xorg.log the following error...

(II) RADEON(0): PLL parameters: rf=2700 rd=12 min=20000 max=35000; xclk=20000
(II) RADEON(0): Panel ID string: C4011^B
(II) RADEON(0): Panel Size from BIOS: 1024x768
(II) RADEON(0): BIOS provided dividers will be used.
(WW) RADEON(0): Failed to detect secondary monitor, MergedFB/Clone mode disabled
(==) RADEON(0): Using gamma correction (1.0, 1.0, 1.0)
(II) RADEON(0): Validating modes on Primary head ---------
(II) RADEON(0): Total number of valid DDC mode(s) found: 0
(WW) RADEON(0): Mode 1280x1024 is out of range.
(WW) RADEON(0): Valid modes must be between 320x200-1024x768

Solutions???
My guess is that somewhere in the BIOS it is set to handle nothing above 1024x768, based on the error from line 3, but I have combed the BIOS and there is no option to change this (that I could find). Anyone have any ideas? Is this in fact a BIOS issue, because like I said above, I KNOW the card and machine can handle it. Also, I thought about wiping it clean and starting over, but I have too much configured on the machine that it would not be worth it. This is just really bugging me and I can't sleep at night

I appreciate any guidence in this matter, and thank you in advance

[DoorGunner]

Hi.

I dont know much about the inspiron itself other than it only has a 14.1-inch (1,024 x 768) display according to one of the spec sheets i found.
It also stated that in your post
(WW) RADEON(0): Valid modes must be between 320x200-1024x768 <=


It may not work but you could try You could try editing grub by adding vga=795 into this line so it looks like this.....
kernel /vmlinuz-2.6.14-1.1637_FC4 ro root=/dev/VolGroup00/LogVol00 rhgb quiet vga=795

note that vga 795 is 1024x768 and will force that setting at start up. Give it a try and let us know if it worked or not

[gtoe]

This is from the specs on it...
14.1-inch TFT SXGA+ active-matrix display with up to 1400 x 1050 x 16 M resolution

Do you mean 795 is setting for 1280x1024, because that is the resolution I want. If not, do you know what the vga "number" would be for 1280x1024?

[DoorGunner]

yes vga=795 is for 1280x1024
I also use this setting for my Samsung 712n monitor

This is the matric i found

.................640x480.........800x600.......... 1024x768........1280x1024
8 bpp............769................771............. .....773 ..............775
16 bpp ..........785 ...............788.................791............ ....794
32 bpp...........786 ...............789.................792............ ....795

My Grub looks like this now

title Fedora Core 4 (2.6.14-1.1637_FC4)
root (hd0,2)
kernel /vmlinuz-2.6.14-1.1637_FC4 ro root=/dev/VolGroup00/LogVol00 rhgb quiet vga=795
initrd /initrd-2.6.14-1.1637_FC4.img