I'm not familiar with a "Thinkpad 1711" and I couldn't find it referenced at thinkwiki.org, but I do have Thinkpad T20 so I'll give it a try.
Open a terminal and enter"
It will prompt you for your user password and then output a hardware list into less. You can scroll up or down within less. Scroll until you see "*-display". It'll look something like this:
description: VGA compatible controller
product: 86C270-294 Savage/IX-MV
vendor: S3 Inc.
physical id: 0
bus info: pci@0000:01:00.0
width: 32 bits
capabilities: pm agp agp-1.0 vga bus_master cap_list
configuration: latency=64 maxlatency=255 mingnt=4
I think your xorg.conf needs an actual video card reference instead of the generic statement. My xorg.conf looks like this in that section:
# 4-28-2008 made changes that should accomodate the full capability of the Savage video card.
# No particular problem, just want to optimize, as can be done. Shouldn't need to use vesa
# when the Savage card is better than that.
Identifier "S3 Inc. 86C270-294 Savage/IX-MV"
# 4-28-2008 switched driver from vesa to savage
# Driver "vesa"
# Driver "savagefb"
# BusID "PCI:1:0:0"
# Option "ShadowStatus" "true"
# Option "AGPMode" "2"
# 4-28-2008 added bustype option and uncommented dmamode
Option "Bustype" "PCI"
Option "DmaMode" "None"
Come on back with your specific hardware list output and maybe we can figure a good entry for your machine.
And please double check the "1711" reference, or better yet try to get the type reference from the back of the machine (i.e., 2647-84U, that's my T20).