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* nouveau optimus HDMI audio support
@ 2013-10-06 21:04 Jethro Beekman
  2013-10-06 22:00 ` Dave Airlie
  0 siblings, 1 reply; 6+ messages in thread
From: Jethro Beekman @ 2013-10-06 21:04 UTC (permalink / raw)
  To: dri-devel

Even with Dave Airlie's recent patch set (
http://lists.freedesktop.org/archives/dri-devel/2013-August/042854.html ), I'm
still having trouble getting HDMI audio to work on my optimus laptop. I'm
running Linux 3.12.0-rc3 on a Lenovo ThinkPad T420s. When I set my BIOS graphics
option to 'Discrete', I get the following two devices in lspci:

01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [Quadro NVS 4200M]
(rev a1)
01:00.1 Audio device: NVIDIA Corporation HDMI Audio stub (rev a1)

When I set the option to 'Optimus', the 01:00.1 device disappears completely.
This is dmesg when loading nouveau in the Optimus configuration:

pci 0000:01:00.0: optimus capabilities: enabled, status dynamic power, hda bios
codec supported
VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG_.VID_ handle
[drm] hdmi device  not found 1 0 1

I modified snd-hda-intel to report which devices it's probing, this is the only
one that shows up:

hda-intel: azx_probe: 0000:00:1b.0

Any ideas what's going on?

Jethro Beekman

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2013-10-07  2:20 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-10-06 21:04 nouveau optimus HDMI audio support Jethro Beekman
2013-10-06 22:00 ` Dave Airlie
2013-10-06 22:45   ` Jethro Beekman
2013-10-06 23:48     ` Dave Airlie
2013-10-07  0:30       ` Jethro Beekman
2013-10-07  2:20         ` Dave Airlie

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