I recently upgraded the memory on the main system I use for VMware Workstation from 4Gb to 8Gb so I could allocate more memory to an Ubuntu 11.10 VirtualMachine. For the Ubuntu VM to take advantage of the memory, I had to install the PAE kernel which stopped VMware Tools from working.
There are good instructions on this VMware post but here's a summary of the steps.
$ uname -r
Find the kernel version, mine was 3.0.0-16-generic-pae.
$ apt-cache search | grep headers
Find the header package name associated with your kernel. Mine was linux-headers-3.0.0-16.generic-pae. Install the headers with this command
$ sudo apt-get install
You can run the following command to confirm the directory where the headers have been placed. On my system it was /usr/src/linux-headers-3.0.0-16-generic-pae
$ dpkg -L
As described on this earlier post, you then run vmware-config-tools.pl script and when prompted for the location of the kernel headers, enter:
# sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.5.0_22/bin/java" 2 # sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.5.0_22/bin/javac" 2
You can switch between the installed versions of Java using the command: