[Bug 75064] HD Audio no passthru @ modes lower than 60hz with openelec

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75064

--- Comment #22 from Dominique Dumont <domi.dumont at free.fr> ---
I've retried with kodi 15.1 and linux 4.2.0-1 on Debian/sid amd64

There are some progress: I managed to get Dolby TrueHD somewhat working at
29.98 FPS by:
- booting with kodi set to 60 FPS
- start the movies, Dolby TrueHD plays fine
- pause kodi
- switch to 24 FPS
- resume movie. Dolby TrueHD plays with some dropouts

If my machine boots with kodi set to 24FPS, my Yamaha amp does not detect a
stream until kodi is switched to 60 FPS.

I've also setup "options drm debug=0xe" in modprobe.conf to get the required
debug logs. I don't think they contain anything relevant. There's no trace of
Audio or sync problems.

Only a lot of lines like:
[  738.286556] [drm:radeon_crtc_page_flip] flip-ioctl() cur_rbo =
ffff88012984c000, new_rbo = ffff8800c9e42000
[  738.303272] [drm:drm_mode_addfb2] [FB:57]

And some mentions of switching power states when I start and stop movies.

Feel free to contact me if you want more information.

Hope this helps

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