For reference's sake, one patch that does not seem to be the culprit: >From the list of 2.6.39 changes at kernelnewbies.org, the one IRQ- related change I could pick out was this:
genirq: Provide forced interrupt threading http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8d32a307e4faa8b123dc8a9cd56d1a7525f69ad3 I built a 2.6.39 with that patch reverted. It made no difference; the regression was present. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/855199 Title: 2.6.39 and later have lost "irqpoll" functionality To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/855199/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
