Also I was now able to install Ubuntu on the T23. I followed the advice here fore to use a USB stick. For those that want to try this I add hereafter what I did.Now it is double proven that there is a bug in the mint installation kit.
My next test should be to try installing mint from my original DVD. Who knows as an upgrade this will work. Or try to install mint from the USB as a fresh install. .... when I find the time.On another computer.
Download [LinuxLive USB Creator] V2.8.14 from [http://www.linuxliveusb.com/en/download]Donate as you likeStart Menu -> All Programs -> LinuxLive USB Creator
Insert the USB key
Choose USB key in the list, I chose [E: - FAT - 8 GB]
Select an ISO file, I chose [ubuntu-10.04.4-desktop-i386.iso]
Choose size of persistent data (I chose 200 MB
, but this is irrelevant here)
Check options, I checked all of them
Click the lightning button
After quite some time (20') the USB is ready.On the T23
At startup enter F1
(to get into the IBM BIOS Setup Utility)
Select boot list
Make sure that USB is an option under Hard Drive (if it is not then select the default configuration - USB will reappear).
Ensure that Hard Drive is at the top of the list and within Hard Drive USB is at the top.
The boot list should now show (at least in my case it did):- Hard Drive
- CD-ROM Drive
! Removable Devices
! IBA 4.0.22 Slot 0240
Make sure the exclamation mark ('!') disappears before the boot device.
Now reboot the T23 (do not forget to reset the boot device to the harddisk).
After a very long time Ubuntu was running (it took the machine 30').
I think connection to the internet is mandatory.
But still from the USB.
Click the installation option on the desktop.
And now it goes quick. In no time Ubuntu was installed and running from the harddisk.