Using "pci=nocrs" is a manual workaround, but not sufficient to resolve this issue.
There is an upstream bug report for this issue on a Dell 1546: https://bugzilla.kernel.org/show_bug.cgi?id=31602 Leann reported in comment #8 that the Dell 1536 in the cert lab works. That machine appears to have 2GB of memory, and we move the USB devices just after that: BIOS-e820: 0000000000100000 - 000000007fe71800 (usable) Memory: 2041068k/2095556k available (5708k kernel code, 452k absent, 54036k reserved, 5382k data, 908k init) pci_root PNP0A03:00: host bridge window [mem 0x80000000-0xcfffffff] pci 0000:00:12.0: BAR 0: assigned [mem 0x80000000-0x80000fff] The machines of other reporters (and the upstream report) appear to have 3GB or more of memory, so the host bridge window [mem 0x80000000-0xcfffffff] is not available, and we put the USB devices in a different place: BIOS-e820: 0000000000100000 - 00000000c7e60800 (usable) Memory: 3977176k/4980736k available (5085k kernel code, 83944k reserved, 2432k data, 704k init, 3148168k highmem) pci_root PNP0A03:00: host bridge window [mem 0xd4000000-0xfebfffff] pci 0000:00:12.0: BAR 0: assigned [mem 0xd4000000-0xd4000fff] I suspect there's some other unreported device at 0xd4000000 that's causing the trouble. ** Bug watch added: Linux Kernel Bug Tracker #31602 http://bugzilla.kernel.org/show_bug.cgi?id=31602 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/647043 Title: Dell Studio 1536 Unable to detect USB ports (Maverick) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/647043/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
