What a disapointment!
 

I've just tried Calculate 11.6.1 (CLDX). The live CD was really impressive. I tested the 10 principal programs by running them from the CLI and the only comment from bash was a minor warning for Gimp: it really was enterprise quality.

But then came the installations. Two of them. Both left me with no X, and there were no log files created to enable me to find what went wrong.

I'll forgive the fact that it overwrote my MBR despite being told not to install grub, and also altered my system clock.

What are you have video card? What video driver was writed to /etc/X11/xorg.conf ? What partition table is used hard disks?

I don't have a video card, just an SiS chipset motherboard. The first time I tried the automatic configuration of video and got the fglrx driver (whatever that is). The second time I chose vesa. Video works in live mode, so it's the installer giving trouble.

/etc/fstab contains
/dev/sda3 /
/dev/sda4 swap
proc /proc
shm /dev/shm
I'd have expected /dev/pts and /sys as well, on the basis of Fedora.

what does command display: "lspci | grep -i vga"? Did LiveCD auto detect fglrx driver (are you choose any video options)?

I've already posted the answer to both those questions! Thanks for your interest, but I'm moving on. I wanted to know if Calculate was any good, and I have the answer: yes, but only when the installer works.

I have had trouble in the past in Debian with fglrx, and even more trouble after using it. The problem was that fglrx "diverts" (ie effectively renames) some libraries, which then can't be found by vesa.
What worked for me was:
1 2 Places>Search for files> fglrx in File system
3 This will probably show some files "diverted". Use
to get rid of these perversions.

These files were affected on my system.
/usr/lib/libGL.so.1
/usr/lib/libGL.so.1.2
/usr/X11R6/lib32/libGL.so.1
/usr/X11R6/lib32/libGL.so.1.2
/usr/X11R6/lib/libGL.so.1
/usr/X11R6/lib/libGL.so.1.2