--- Comment #65 from Maik Freudenberg <hhfe...@gmx.de> ---
I feel like I'm jumping from puddle to puddle now.
Lukas, I previously couldn't test your patches due to an acpica bug affecting
my machine rendering results useless. Luckily, this has been fixed now.
Meanwhile, I discovered that (at least) kernels 4.9-4.13 suffer from some pci
config space bug making re-reading the header type impossible. The kernel will
always put out a cached version thus making it impossible to enable the hda dev
with any method, even remove/rescan.
So a fair warning to users running a 4.9LTS kernel trying to turn on audio.
Kernel series 4.4 or 4.14+ work.
Now with the acpi bug fixed, I applied both of your v2 patchsets with some
nip/tuck to a 4.16rc4+ kernel and ran into the next oddity: while the pci quirk
in general works, re-reading the header type will always return 0x00 so the hda
device is not added.
lspci confirms that the quirk is otherwise working:
00: de 10 92 12 07 00 10 00 a1 00 02 03 00 00 80 00
480: 00 00 00 00 17 00 00 00 00 00 00 02 00 00 00 00
I'll investigate what's happening the next days.
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