One affected 965gm user here (bug report with attachments https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/771655) - 4GB of memory but no PAE, ie. 64-bit. On the other hand my problem, is simply X.org crashing/segfaulting, I don't get apport triggered for a GPU lockup bug report. So sorry for the (possible) noise, even though my problem is clearly coming from the same bunch of changes and is similarly random/rare.
To make up for that, I went through the mentioned lockup bug reports to answer the question and: only two has PAE, four don't have PAE, but all those i965gm GPU lockup reports currently so far seem to be i686 unlike me.
One affected 965gm user here (bug report with attachments https:/ /bugs.launchpad .net/ubuntu/ +source/ xorg/+bug/ 771655) - 4GB of memory but no PAE, ie. 64-bit. On the other hand my problem, is simply X.org crashing/ segfaulting, I don't get apport triggered for a GPU lockup bug report. So sorry for the (possible) noise, even though my problem is clearly coming from the same bunch of changes and is similarly random/rare.
To make up for that, I went through the mentioned lockup bug reports to answer the question and: only two has PAE, four don't have PAE, but all those i965gm GPU lockup reports currently so far seem to be i686 unlike me.