I spent some times testing and found that the commits causing the regression is between v3.11 and v3.12-rc1. It still needs more times to do the bisect.
Mon May 26 19:02:09 gavin@gavin-w530:~/os/linux$ git log --pretty=oneline v3.11..v3.12-rc1 | wc -l 10153 Since there're still 10153 commits left to be identified. I'll try to test the related commits first which show up in the following: Mon May 26 18:51:24 gavin@gavin-w530:~/os/linux$ git log --pretty=oneline v3.11..v3.12-rc1 drivers/acpi/pci* a9238741987386bb549d61572973c7e62b2a4145 Merge tag 'pci-v3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci e89c33168aad32436da842ddda307dcc31c0c4e2 Merge branch 'pci/misc' into next 3dc48af310709b85d07c8b0d3aa8f1ead02829d3 PCI/ACPI: Fix _OSC ordering to allow PCIe hotplug use when available 39772038ea93e85ea4f1307ec9c1f48a063d89a0 PCI: Assign resources for hot-added host bridge more aggressively 928bea964827d7824b548c1f8e06eccbbc4d0d7d PCI: Delay enabling bridges until they're needed be1c9de98d8904c75a5ab8b2a0d97bea0f7c07cc ACPI / PCI: Make bus registration and unregistration symmetric -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1290189 Title: Unable to hotplug ExpressCard in 12.04.4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-saucy/+bug/1290189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
