[Bug 82349] HDMI audio stops working when drm_kms_helper EDID overwrite is in place
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Wed Mar 25 17:21:49 PDT 2015
https://bugs.freedesktop.org/show_bug.cgi?id=82349
Jolan Luff <jolan at gormsby.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|INVALID |---
--- Comment #10 from Jolan Luff <jolan at gormsby.com> ---
Hi,
I can confirm that this patch works; tested with 4.0-rc5.
Background:
I have an ASUS Chromebox (Celeron 2955U) connected to an Onkyo RT-393 AVR via
HDMI. It very rarely (5-10% of the time) can initiate a successful handshake
to the AVR so I dumped the EDID and have been using grub to enable the output
and force the EDID:
drm_kms_helper.edid_firmware=HDMI-A-1:edid/edid.bin video=HDMI-A-1:D
This caused video to work 100% of the time but audio to work 0% of the time;
eld was always empty and the AVR was indicating no signal:
/proc/asound/card0/eld#0.0
monitor_present 0
eld_valid 0
Now with this patch I rebooted and audio/video worked 3/3 times which has never
happened in the ~6 weeks that I've had this hardware combo.
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