I was about to test latest upstream kernel as suggested by Christopher, but I guess it is not needed anymore : today's automatic updates contained a new kernel (3.19.0-30-generic) that seems to solve the issue (no more IRQ msg).
Thanks for taking care of it -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1500156 Title: r592 IRQ: DMA errors cause log files to grow *HUGE* To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1500156/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs