Finally it seems that it was a hardware problem. Although memtest86 ran for 40h without any error, RAM was my last hope and I convinced Dell to change it. Now it's been 2 months without crash. So I guess that was it ! (phew... almost 2 years of bug searching...)
Sorry for this; apparently this was not a ubuntu bug ! -- [i965] random crash with vertical stripes https://bugs.launchpad.net/bugs/309927 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
