[SOLVED] Drop to shell "INVALID MODE" on lcd

[Mad Professor]

I recently replaced a motherboard which required a different video card, and XORG works fine. But when I drop to shell to go to run level 3 or shutdown the machine the monitor screams at me in green text invalid mode.

I don't know if the resolution is dropping to 640x480 which is not supported by the monitor or if it's going above 1280x768 which is the native resolution of monitor, or if the refresh rate is going above 75hz.

How can I correct this problem? The card is pci-e ATI 2400xt, running on CENTOS 5.3.

[HROAdmin26]

Review your menu.lst file and look at the kernel line - does it have a "vga=XXX" entry? If not, it's likely falling back to 640x480.

kernel /vmlinuz-2.6.16.60-0.54.5-smp root=/dev/md1 vga=0x317    resume=/dev/md0 splash=silent showopts

VGA Framebuffer Modes

More Google

[Mad Professor]

check menu.lst no vga option is set.

title CentOS (2.6.18-128.1.10.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-128.1.10.el5 ro root=/dev/VolGroup00/LogVol00 rh$
        initrd /initrd-2.6.18-128.1.10.el5.img

Where would it go?

[devils casper]

Add vga=773 or vga=0x317 at the end of kernel line. It will set correct resolution.

        kernel /vmlinuz-2.6.18-128.1.10.el5 ro root=/dev/VolGroup00/LogVol00 rh$ vga=773

[Mad Professor]

THANK YOU GUYS! It works... This is useful information. I love asking stuff on here and getting a prompt responses to my problem.

Thank you...

[devils casper]

Glad to help you !