Adding on to my display issues in my earlier post, I've reinstalled Ubuntu 12.04.1 and 12.10 many times - somewhere between one and three dozen times.
First, I followed all of Jim's steps from the T530.
Second, I allowed that ppa:ubuntu-x-swat/x-updates repository to update my other drivers including the xserver-xorg-intel driver. Note that ia32-libs was not installed when I installed this. On one of my previous iterations I installed ia32-libs before I did the driver stuff. Ubuntu-x-swat installed a number of additional i386 packages which may have messed up things.
Third, I followed the Bumblebee instructions.
I will need to remember to ppa-purge both repositories before upgrading to 12.04.2. I hope most of this will roll into that release.
From time to time lightdm, the login display manager, won't start. I do a …
sudo service lightdm restart
… from the command line to have it restart. That works fine.
Moving icons on the side dock thing only works properly on the main display. In my case it's the laptop's display.
Three displays - two DisplayPort and the built-in - does not work yet.
I've tweaked my power settings. Here's what my /etc/default/grub looks like:
GRUB_CMDLINE_LINUX_DEFAULT="quiet nox2apic splash i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.semaphores=1 drm.vblankoffdelay=1″
Most of the grub settings I took from Ubuntu Wiki's Power Saving Tweaks.