Commen=
t # 74
on bug 75985<=
/a>
from Eugene Medvedev
(In reply to Maik Freudenberg from comment #27)
> Created attachment 136418 [details]=
> Kernel module to toggle audio function
I have a somewhat strange variation on the bug when using your kernel module
workaround.
MSI GE63 Raider 8RF looks like this when everything's working:
00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/D=
RAM
Registers (rev 07)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Co=
re
Processor PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Device 3e9b
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH The=
rmal
Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host
Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:14.3 Network controller: Intel Corporation Wireless-AC 9560 [Jefferson P=
eak]
(rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI
Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Device a353 (rev 10)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port=
9
(rev f0)
00:1d.6 PCI bridge: Intel Corporation Device a336 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device a30d (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI
Controller (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation GP104M [GeForce GTX 1=
070
Mobile] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GP104 High Definition Audio Contro=
ller
(rev a1)
02:00.0 Non-Volatile memory controller: Kingston Technology Company, Inc.
Device 5008 (rev 01)
03:00.0 Ethernet controller: Qualcomm Atheros Killer E2500 Gigabit Ethernet
Controller (rev 10)
What's strange is that upon cold boot -- using the proprietary driver -- the
audio subdevice is missing entirely -- even from "lspci -H1" and =
can't be
enabled:
[ 3.214369] nvhda: version 0.01
[ 3.214373] nvhda: Found nv VGA device 0000:01:00.0
[ 3.214377] nvhda: enabling audio
[ 3.214378] nvhda: Not multifunction, no audio
[ 3.214380] nvhda: Succesfully loaded. Audio 0000:01:00.0 is off
Unloading and reloading the module after the boot has completed makes no
difference, it doesn't work. Upon suspending and resuming once, however, the
device is there on "lspci -H1", and the module can enable it. I e=
nded up
setting the module up to unload on suspend and load on resume, so that I can
just do a suspend/resume when I need to use HDMI output, which isn't that
often.
I can supply further data and experiment a bit if needed, but my understand=
ing
of this area of hardware is essentially nil.