라즈베리 파이 2 audio 관련 config.txt 설정

라즈베리 openELEC을 설치하면

HDMI로 연결했음에도 불구하고 소리가 나지 않는다 -_-

그래서 검색을 해보니...

hdmi_drive=2로 설정을 하라는데

이리저리 찾아보니.. 부트로더가 아니라 라즈베리 설정에 관련된 파일인 config.txt에 하라고 되어있다.

즉, 커널 인자로 넘기는게 아니란것!

################################################################################ #      This file is part of OpenELEC - http://www.openelec.tv #      Copyright (C) 2009-2014 Stephan Raue (stephan@openelec.tv) #      Inspired and partly copied from: #  http://youresuchageek.blogspot.fr/2012/09/howto-raspberry-pi-openelec-on.html # #  OpenELEC is free software: you can redistribute it and/or modify #  it under the terms of the GNU General Public License as published by #  the Free Software Foundation, either version 2 of the License, or #  (at your option) any later version. # #  OpenELEC is distributed in the hope that it will be useful, #  but WITHOUT ANY WARRANTY; without even the implied warranty of #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the #  GNU General Public License for more details. # #  You should have received a copy of the GNU General Public License #  along with OpenELEC.  If not, see <http://www.gnu.org/licenses/>. ################################################################################ # Bootloader configuration - config.txt ################################################################################ ################################################################################ # Memory (System/GPU configuration ) ################################################################################ # default GPU memory split (do not change if you do not know what you are doing)   gpu_mem=128 # SDRAM size based GPU memory split, uncomment and setup to override 'gpu_mem'   gpu_mem_256=112   gpu_mem_512=160   gpu_mem_1024=256 ################################################################################ # Overclocking settings # WARNING: Do not change/enable if you do not know what you are doing! #          The System may become unstable or you can have data corruption or #          you can loose your warranty if you set wrong settings # # please read: http://elinux.org/RPi_config.txt#Overclocking_configuration ################################################################################ # Overclock mode settings. # # default recommended values are: arm_freq | core_freq | sdram_freq | over_voltage # no overclocking               :    700   |    250    |    400     |      0 # mode 'Modest'                 :    800   |    300    |    400     |      0 # mode 'Medium'                 :    900   |    333    |    450     |      2 # mode 'High'                   :    950   |    450    |    450     |      6 # mode 'Turbo'                  :   1000   |    500    |    500     |      6 # arm_freq=700 # core_freq=250 # sdram_freq=400 # over_voltage=0 # set to 'force_turbo=1' to disable dynamic overclocking (you can lose your warranty!)   force_turbo=0 # If you have any data corruption using Turbo Mode and overclocking # try with this setting uncommented # If this still fails, try to use Medium mode without "over_voltage=2" # If it ultimately keeps failing, forget about this until it gets fixed # Use a more conservative mode that will works fine in any cases: # initial_turbo=30 ################################################################################ # Overscan settings ################################################################################ # Make display smaller to stop text spilling off the screen # see also http://www.raspberrypi.org/phpBB3/viewtopic.php?f=67&t=15700 # overscan_scale=1 # disable_overscan=1 # Adapt overscan values to your needs # overscan_left=57 # overscan_right=59 # overscan_top=20 # overscan_bottom=20 ################################################################################ # various settings see also: http://elinux.org/RPi_config.txt ################################################################################ # Force HDMI even if unplugged or powered off # hdmi_force_hotplug=1 # Doesn't sent initial active source message. # Avoids bringing CEC (enabled TV) out of standby and channel switch when # rebooting.   hdmi_ignore_cec_init=1 ################################################################################ # License keys to enable GPU hardware decoding for various codecs # to obtain keys visit the shop at http://www.raspberrypi.com ################################################################################ # decode_MPG2=0x00000000 # decode_WVC1=0x00000000 # decode_DTS=0x00000000 # decode_DDP=0x00000000 ################################################################################ # End of default configuration # all values below this line were inserted from config.txt.bk (your old config) # and can be merged with the above values ################################################################################

그래서 hdmi_drive=2 로 설정하고 부팅을 하니

hdmi_drive chooses between HDMI and DVI modes  hdmi_drive=1 Normal DVI mode (No sound)  hdmi_drive=2 Normal HDMI mode (Sound will be sent if supported and enabled) [링크 : http://elinux.org/RPiconfig]

HDMI 모니터에 연결하면 소리도 잘나오고 모두 happy~ 이긴한데!

DVI 모니터에 HDMI to DVI 케이블로 연결하면 화면이 안나온다!!!

아마 DMT 방식이라던가 이런 DVI 모니터에서 지원못하는 방식이라서 그런거 같은데

hdmi_group=0으로 하면 EDID로 받는다고 하니 문제가 있는 모니터가 아니라면 0으로 설정해주면 되지 않으려나?

hdmi_group defines the HDMI type Not specifying the group, or setting to 0 will use the preferred group reported by the edid. hdmi_group=1   CEA hdmi_group=2   DMT [링크 : http://elinux.org/RPiconfig]

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뜬금포 결론

DVI로 해서 처음 소리가 안난건

openELEC에서 audio 출력이 HDMI로 되어있고

라즈베리 OS 설정에서는 DVI로 모드로 되어 있어서 서로 엉긴것 -_-

일단 기본값으로는 DVI 출력에 HDMI 오디오 출력이므로

HDMI-DVI로 쓴다면 openELEC 설정에서 Audio 출력을 HDMI and Analogue 로 설정해주어야 한다.

그리고 HDMI로 사용한다면

hdmi_drive=2로 설정해주면 나머지는 설정할 사항이 없다.

System - Settings

System

Audio output - Audio output device 를 HDMI and Analogue로 설정해주면 DVI 사용시 아날로그 출력이 된다.

[링크 : http://openelec.tv/forum/124-raspberry-pi/74408-problems-with-hdmi-audio-on-openelec-5-0]