[Bug 93881] HDMI sometimes muted at boot

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=93881

--- Comment #5 from jinliangx.wang at intel.com ---
Try to reproduce this bug again on latest drm-intel-nightly kernel.

The test result is slightly different from Guillaume.

As Guillaume's test step, press any key to wake up the monitor and log in, play
audio, I could hear sound from HDMI monitor no matter playing through HDMI or
Analog, It's incorrect behaviour.

ELD and codec are invalid:
1. cat /proc/asound/card0/eld*
monitor_present         0
eld_valid               0

2. cat /proc/asound/card0/codec#0
Codec: Realtek ALC282
Address: 0
AFG Function Id: 0x1 (unsol 1)
Vendor Id: 0x10ec0282
Subsystem Id: 0x1025083d
Revision Id: 0x100003
No Modem Function Group found
Default PCM:
N/A
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
  Power: setting=UNKNOWN, actual=UNKNOWN, Error, Clock-stop-OK, Setting-reset
Invalid AFG subtree

3. cat /proc/asound/card0/codec#2
Codec: Intel Valleyview2 HDMI
Address: 2
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x80862882
Subsystem Id: 0x80860101
Revision Id: 0x100000
No Modem Function Group found
Default PCM:
N/A
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
  Power: setting=UNKNOWN, actual=UNKNOWN, Error, Clock-stop-OK, Setting-reset
Invalid AFG subtree

Software:
Linux distribution: Ubuntu 14.04 LTS 64 bits
Kernel: 4.0.0-rc3
Branch: git://anongit.freedesktop.org/drm-intel  drm-intel-nightly
Commit: f7def439e21cacf7656539edc55a4884734743de
BIOS:   v2.05

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