Hi.Try to determine possible resolutions by typing "hwinfo --framebuffer". Use the hex code 0x... and put it as kernel parameter in your grub.conf.
For 1400x1050 with kernel 2.6.24-r3 I am using the following lines: title Gentoo GNU/Linux (gentoo-sources-2.6.24-r3) root (hd0,1) kernel /gentoo-sources-2.6.24-r3 root=/dev/sda5 vga=0x344 Regards, acm.
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