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The X61 is apparently very similar to a T61 internally.
You may be able to find helpful tips in the installation instructions for the Installation instructions for the Thinkpad T61 for problems that are not solved here.
This page addresses installation and running of Crossfire software.
A CD-ROM drive in a Thinkpad Ultra Base will be able to boot Lenovo's unmodified ISO and upgrade the BIOS/firmware.Install Ubuntu 14.04 · After Installing Ubuntu 14.04 Ubuntu 14.04 was released on the 26th of April 2014, which just so happened to be a Thursday.From there on in, Ubuntu 14.04 Trusty Tahr provided millions of users all over the world with a free, stable, secure operating system.It seems likely the difference is due to the GNOME upgrade.In general the the backlight problem can be solved by suspending with Please see also this link for adding the s2ram to your acpi scripts.