他の方の質問を参考に色んなコマンドを実行してみました。


yuya@yuya-System-Product-Name:~$ lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] RS880 Host Bridge
00:01.0 PCI bridge: ASUSTeK Computer Inc. RS880 PCI to PCI bridge (int gfx)
00:09.0 PCI bridge: Advanced Micro Devices [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 4)
00:0a.0 PCI bridge: Advanced Micro Devices [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 5)
00:11.0 SATA controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode] (rev 40)
00:12.0 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:12.2 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:13.2 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 41)
00:14.1 IDE interface: ATI Technologies Inc SB7x0/SB8x0/SB9x0 IDE Controller (rev 40)
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: ATI Technologies Inc SB7x0/SB8x0/SB9x0 LPC host controller (rev 40)
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
00:15.0 PCI bridge: ATI Technologies Inc SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0)
00:15.1 PCI bridge: ATI Technologies Inc SB700/SB800/SB900 PCI to PCI bridge (PCIE port 1)
00:16.0 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
00:16.2 USB Controller: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link Control
01:05.0 VGA compatible controller: ATI Technologies Inc RS880 [Radeon HD 4250]
01:05.1 Audio device: ATI Technologies Inc RS880 Audio Device [Radeon HD 4200]
02:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller
02:00.1 IDE interface: VIA Technologies, Inc. VT6415 PATA IDE Host Controller (rev a0)
03:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)

yuya@yuya-System-Product-Name:~$ aplay -L;
default
    Playback/recording through the PulseAudio sound server
pulse
    Playback/recording through the PulseAudio sound server
front:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    Front speakers
surround40:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Digital
    IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    Direct sample mixing device
dmix:CARD=SB,DEV=1
    HDA ATI SB, ALC892 Digital
    Direct sample mixing device
dsnoop:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    Direct sample snooping device
dsnoop:CARD=SB,DEV=1
    HDA ATI SB, ALC892 Digital
    Direct sample snooping device
hw:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    Direct hardware device without any conversions
hw:CARD=SB,DEV=1
    HDA ATI SB, ALC892 Digital
    Direct hardware device without any conversions
plughw:CARD=SB,DEV=0
    HDA ATI SB, ALC892 Analog
    Hardware device with all software conversions
plughw:CARD=SB,DEV=1
    HDA ATI SB, ALC892 Digital
    Hardware device with all software conversions
hdmi:CARD=HDMI,DEV=0
    HDA ATI HDMI, HDMI 0
    HDMI Audio Output
dmix:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Direct sample mixing device
dsnoop:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Direct sample snooping device
hw:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Direct hardware device without any conversions
plughw:CARD=HDMI,DEV=3
    HDA ATI HDMI, HDMI 0
    Hardware device with all software conversions

yuya@yuya-System-Product-Name:~$ pacmd list-sinks;
Welcome to PulseAudio! Use "help" for usage information.
>>> 2 sink(s) available.
    index: 0
    name: <alsa_output.pci-0000_01_05.1.hdmi-stereo>
    driver: <module-alsa-card.c>
    flags: HARDWARE DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: SUSPENDED
    suspend cause: IDLE
    priority: 9050
    volume: 0: 100% 1: 100%
            0: 0.00 dB 1: 0.00 dB
            balance 0.00
    base volume: 100%
                 0.00 dB
    volume steps: 65537
    muted: no
    current latency: 0.00 ms
    max request: 0 KiB
    max rewind: 0 KiB
    monitor source: 0
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 ステレオ
    used by: 0
    linked by: 0
    configured latency: 0.00 ms; range is 0.50 .. 1999.82 ms
    card: 0 <alsa_card.pci-0000_01_05.1>
    module: 4
    properties:
        alsa.resolution_bits = "16"
        device.api = "alsa"
        device.class = "sound"
        alsa.class = "generic"
        alsa.subclass = "generic-mix"
        alsa.name = "HDMI 0"
        alsa.id = "HDMI 0"
        alsa.subdevice = "0"
        alsa.subdevice_name = "subdevice #0"
        alsa.device = "3"
        alsa.card = "1"
        alsa.card_name = "HDA ATI HDMI"
        alsa.long_card_name = "HDA ATI HDMI at 0xfe8e8000 irq 19"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:01:05.1"
        sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:05.1/sound/card1"
        device.bus = "pci"
        device.vendor.id = "1002"
        device.vendor.name = "ATI Technologies Inc"
        device.product.id = "970f"
        device.product.name = "RS880 Audio Device [Radeon HD 4200]"
        device.string = "hdmi:1"
        device.buffering.buffer_size = "352768"
        device.buffering.fragment_size = "176384"
        device.access_mode = "mmap+timer"
        device.profile.name = "hdmi-stereo"
        device.profile.description = "デジタルステレオ (HDMI)"
        device.description = "RS880 Audio Device [Radeon HD 4200] デジタルステレオ (HDMI)"
        alsa.mixer_name = "ATI RS690/780 HDMI"
        alsa.components = "HDA:1002791a,00791a00,00100000"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
  * index: 1
    name: <alsa_output.pci-0000_00_14.2.analog-stereo>
    driver: <module-alsa-card.c>
    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: SUSPENDED
    suspend cause: IDLE
    priority: 9959
    volume: 0: 100% 1: 100%
            0: 0.00 dB 1: 0.00 dB
            balance 0.00
    base volume: 100%
                 0.00 dB
    volume steps: 65537
    muted: no
    current latency: 0.00 ms
    max request: 0 KiB
    max rewind: 0 KiB
    monitor source: 1
    sample spec: s16le 2ch 44100Hz
    channel map: front-left,front-right
                 ステレオ
    used by: 0
    linked by: 0
    configured latency: 0.00 ms; range is 0.50 .. 1999.82 ms
    card: 1 <alsa_card.pci-0000_00_14.2>
    module: 5
    properties:
        alsa.resolution_bits = "16"
        device.api = "alsa"
        device.class = "sound"
        alsa.class = "generic"
        alsa.subclass = "generic-mix"
        alsa.name = "ALC892 Analog"
        alsa.id = "ALC892 Analog"
        alsa.subdevice = "0"
        alsa.subdevice_name = "subdevice #0"
        alsa.device = "0"
        alsa.card = "0"
        alsa.card_name = "HDA ATI SB"
        alsa.long_card_name = "HDA ATI SB at 0xfe6f8000 irq 16"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:14.2"
        sysfs.path = "/devices/pci0000:00/0000:00:14.2/sound/card0"
        device.bus = "pci"
        device.vendor.id = "1002"
        device.vendor.name = "ATI Technologies Inc"
        device.product.id = "4383"
        device.product.name = "SBx00 Azalia (Intel HDA)"
        device.form_factor = "internal"
        device.string = "front:0"
        device.buffering.buffer_size = "352768"
        device.buffering.fragment_size = "176384"
        device.access_mode = "mmap+timer"
        device.profile.name = "analog-stereo"
        device.profile.description = "アナログステレオ"
        device.description = "内部オーディオ アナログステレオ"
        alsa.mixer_name = "Realtek ALC892"
        alsa.components = "HDA:10ec0892,1043841b,00100302"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    ports:
        analog-output: アナログ出力 (priority 9900, available: unknown)
        analog-output-headphones: アナログヘッドフォン (priority 9000, available: no)
    active port: <analog-output>


yuya@yuya-System-Product-Name:~$ pacmd list-cards;
Welcome to PulseAudio! Use "help" for usage information.
>>> 2 card(s) available.
    index: 0
    name: <alsa_card.pci-0000_01_05.1>
    driver: <module-alsa-card.c>
    owner module: 4
    properties:
        alsa.card = "1"
        alsa.card_name = "HDA ATI HDMI"
        alsa.long_card_name = "HDA ATI HDMI at 0xfe8e8000 irq 19"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:01:05.1"
        sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:05.1/sound/card1"
        device.bus = "pci"
        device.vendor.id = "1002"
        device.vendor.name = "ATI Technologies Inc"
        device.product.id = "970f"
        device.product.name = "RS880 Audio Device [Radeon HD 4200]"
        device.string = "1"
        device.description = "RS880 Audio Device [Radeon HD 4200]"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    profiles:
        output:hdmi-stereo: デジタルステレオ (HDMI) Output (priority 5400)
        off: オフ (priority 0)
    active profile: <output:hdmi-stereo>
    sinks:
        alsa_output.pci-0000_01_05.1.hdmi-stereo/#0: RS880 Audio Device [Radeon HD 4200] デジタルステレオ (HDMI)
    sources:
        alsa_output.pci-0000_01_05.1.hdmi-stereo.monitor/#0: Monitor of RS880 Audio Device [Radeon HD 4200] デジタルステレオ (HDMI)
    ports:
    index: 1
    name: <alsa_card.pci-0000_00_14.2>
    driver: <module-alsa-card.c>
    owner module: 5
    properties:
        alsa.card = "0"
        alsa.card_name = "HDA ATI SB"
        alsa.long_card_name = "HDA ATI SB at 0xfe6f8000 irq 16"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:14.2"
        sysfs.path = "/devices/pci0000:00/0000:00:14.2/sound/card0"
        device.bus = "pci"
        device.vendor.id = "1002"
        device.vendor.name = "ATI Technologies Inc"
        device.product.id = "4383"
        device.product.name = "SBx00 Azalia (Intel HDA)"
        device.form_factor = "internal"
        device.string = "0"
        device.description = "内部オーディオ"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    profiles:
        output:analog-stereo: アナログステレオ Output (priority 6000)
        output:analog-stereo+input:analog-stereo: アナログステレオ入出力 (priority 6060)
        output:analog-surround-40: アナログサラウンド 4.0 Output (priority 700)
        output:analog-surround-40+input:analog-stereo: アナログサラウンド 4.0 Output + アナログステレオ Input (priority 760)
        output:analog-surround-41: アナログサラウンド 4.1 Output (priority 800)
        output:analog-surround-41+input:analog-stereo: アナログサラウンド 4.1 Output + アナログステレオ Input (priority 860)
        output:analog-surround-50: アナログサラウンド 5.0 Output (priority 700)
        output:analog-surround-50+input:analog-stereo: アナログサラウンド 5.0 Output + アナログステレオ Input (priority 760)
        output:analog-surround-51: アナログサラウンド 5.1 Output (priority 800)
        output:analog-surround-51+input:analog-stereo: アナログサラウンド 5.1 Output + アナログステレオ Input (priority 860)
        output:analog-surround-71: Analog Surround 7.1 Output (priority 700)
        output:analog-surround-71+input:analog-stereo: Analog Surround 7.1 Output + アナログステレオ Input (priority 760)
        output:iec958-stereo: デジタルステレオ (IEC958) Output (priority 5500)
        output:iec958-stereo+input:analog-stereo: デジタルステレオ (IEC958) Output + アナログステレオ Input (priority 5560)
        input:analog-stereo: アナログステレオ Input (priority 60)
        off: オフ (priority 0)
    active profile: <output:analog-stereo+input:analog-stereo>
    sinks:
        alsa_output.pci-0000_00_14.2.analog-stereo/#1: 内部オーディオ アナログステレオ
    sources:
        alsa_output.pci-0000_00_14.2.analog-stereo.monitor/#1: Monitor of 内部オーディオ アナログステレオ
        alsa_input.pci-0000_00_14.2.analog-stereo/#2: 内部オーディオ アナログステレオ
    ports:
        analog-output: アナログ出力 (priority 9900, available: unknown)
        analog-output-headphones: アナログヘッドフォン (priority 9000, available: no)
        analog-input-microphone-front: Front Microphone (priority 8500, available: unknown)
        analog-input-microphone-rear: Rear Microphone (priority 8200, available: unknown)
        analog-input-linein: アナログライン入力 (priority 8100, available: unknown)
        iec958-stereo-output: Digital Output (IEC958) (priority 0, available: unknown)

>>> yuya@yuya-System-Product-Name:~$ amixer -c 0;
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [0.00dB] [on]
  Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [0.00dB] [on]
  Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Front Mic',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%] [-34.50dB] [off]
  Front Right: Playback 0 [0%] [-34.50dB] [off]
Simple mixer control 'Front Mic Boost',0
  Capabilities: volume penum
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 1 [33%] [10.00dB]
  Front Right: 1 [33%] [10.00dB]
Simple mixer control 'Surround',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [0.00dB] [on]
  Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Center',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'LFE',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Side',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 64 [100%] [0.00dB] [on]
  Front Right: Playback 64 [100%] [0.00dB] [on]
Simple mixer control 'Line',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%] [-34.50dB] [off]
  Front Right: Playback 0 [0%] [-34.50dB] [off]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958 Default PCM',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 46
  Front Left: Capture 17 [37%] [1.00dB] [on]
  Front Right: Capture 17 [37%] [1.00dB] [on]
Simple mixer control 'Capture',1
  Capabilities: cvolume cswitch penum
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 46
  Front Left: Capture 0 [0%] [-16.00dB] [off]
  Front Right: Capture 0 [0%] [-16.00dB] [off]
Simple mixer control 'Auto-Mute Mode',0
  Capabilities: enum
  Items: 'Disabled' 'Enabled'
  Item0: 'Enabled'
Simple mixer control 'Input Source',0
  Capabilities: cenum
  Items: 'Rear Mic' 'Front Mic' 'Line'
  Item0: 'Front Mic'
Simple mixer control 'Input Source',1
  Capabilities: cenum
  Items: 'Rear Mic' 'Front Mic' 'Line'
  Item0: 'Rear Mic'
Simple mixer control 'Rear Mic',0
  Capabilities: pvolume pswitch penum
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%] [-34.50dB] [off]
  Front Right: Playback 0 [0%] [-34.50dB] [off]
Simple mixer control 'Rear Mic Boost',0
  Capabilities: volume penum
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]

yuya@yuya-System-Product-Name:~$ amixer -c 1;
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined penum
  Playback channels: Mono
  Mono: Playback [on]

Mocchiさん　返信ありがとうございます。

そうなのですか・・・

PCケースのイヤホンジャックからも音が出ません。


サウンドボードを設置すれば音は出る可能性はあるのでしょうか？