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Created attachment 705878[details]
alsa-info.sh from ATI HD 5870
Description of problem:
While setting up automation on sound devices I attempted to configure
an ATI HD 5870 with a loopback cable. To do this I used a digital to analog converter and headphones to ensure sound was OK. No matter want settings were used I could not get sound from the HDMI port.
Jaroslav,
I added your comment below and attached the output from alsa-info.sh:
>[root@dhcp-186-45 card1]# dmesg | grep HDMI [drm] HDMI-A
>HDMI status: Codec=0 Pin=3 Presence_Detect=0 ELD_Valid=0
>
>It looks like that the graphics driver does not communicate with the
>monitor properly. The ELD information is passed through the HDMI
>handshake from the graphics driver.
# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog] Subdevices: 1/1
Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH],
device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
Version-Release number of selected component (if applicable):
How reproducible:
Steps to Reproduce:
1.
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Actual results:
Expected results:
Additional info:
Comment 2RHEL Program Management
2013-10-13 23:51:46 UTC
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.
Red Hat invites you to ask your support representative to
propose this request, if appropriate, in the next release of
Red Hat Enterprise Linux.
Manually tested using RHEL6.7. I was able to play sound through HDMI using speaker-test and aplay assuming the audio file was longer than 2-3 seconds as there was a 2-3 second delay before sound started playing. Doing the same through onboard analog audio worked without any issues. Playing an ogg file through Totem with GNOME configured to use the onboard analog audio played fine. Doing the same with HDMI configured through GNOME resulted in the same 2-3 second delay before any sound was heard.
According comment#6, audio is working but with a delay. I'm closing this bug.
It would be also good to test the direct ALSA hdmi device using 'aplay' or 'speaker-test' - like 'speaker-test -D plug:hdmi' to detect if the delay is caused by the ALSA subsystem or something else.