[alsa-devel] Radeon unconnected HDMI eats samples at 280 kHz

[Alexander E. Patrakov]

19.09.2014 23:47, David Henningsson wrote:
> If audio_enabled quickly changes to off and then on when there is a mode
> change, it might make sense to *not* wake up the audio driver in this
> case, as I assume that the audio capabilities on the HDMI TV will not
> change just because the video mode changes.

Unfortunately, they will. Some low-resolution video modes just don't 
have enough pixel clock to transfer the 7.1 audio signal at 192 kHz. See 
the table on page 105 (shown as 121 in some readers) of 
http://www.microprocessor.org/HDMISpecification13a.pdf , section "7.3.3 
Video Dependency".

-- 
Alexander E. Patrakov