On 09/22/2017 03:34 AM, Jeremiah Rothschild wrote:
On Fri, Sep 22, 2017 at 08:14:03AM +0100, Gordan Bobic wrote:
Do you have any PCIe cards in yours?
Actually, no.
What is DT mode?
From my understanding of the thread so far, both Jeremiah and I are running
Tianocore UEFI firmware, chain loaded from u-boot.
That's right. I originally miscommented that I was not running UEFI then later followed up that I was.
Keep in mind that this doesn't mean the UEFI being used is getting the right EFI variables populated on its journey through uboot to a running system. Not all UEFI is equal.
It seems fairly clear to me that someone introduced an ACPI related bug in 4.5.0-25 and onwards. My system was always fine and always able to boot without adding 'acpi=off' until that version.
The OS is built to expect ACPI. That reliance will increase as it progresses. As has been suggested previously, you should really consider moving to a supported boot platform rather than chainloading. There are a number of improvements in the new official AMI firmwares that the distro takes advantage of.
I don't see this as an ACPI bug, but rather a fix that closes bugs you were using as features until the more recent kernels.