Comment 37 for bug 1349740

Thanks for your time,

Trying to boot without any of the parameters gives the same results as
pci=noacpi, noapic and nolapic: just garbled text and then it freezes and won't respond to anything at all, so there's no choice but to just switch it off.
Full dmesg attached after booting (dmesg_full_pnpacpi=off.txt)

also for completeness, i've attached the results of

ls /sys/bus/acpi/drivers/*/
and
/sys/bus/acpi/devices/*/hid

Having seen a couple of messages suggesting this might be a regression from 3.15+, i also tried the latest 3.14 (3.14.21) from ubuntu's kernelmainline as well as building a custom 3.17 with the patch you linked to.

Results: Some success with patched 3.17.0 kernel! Can actually boot without any of the parameters set now, but still some errors/warnings recorded. (See dmesg_after_patched_kernel.txt)

3.14.21 also boots with no parameters set AND there's no warnings/errors (e.g. nothing related to dw_dmac) at boot. (See dmesg_with_3.14_kernel.txt)

Unfortunately neither kernel seems to completely fix the issue 100%, as it still won't power off properly at shutdown?
I think we're close to narrowing down the issue(s) though!