Problema high definition audio controller.

[MrSimonX]

Salve a tutti premetto di essere un novizio di ubuntu, il problema è il seguente : nelle preferenze dell'audio quando scelgo come dispositivo di uscita high definition audio controller digital stereo (HDMI), non si sente nulla (scegliendo invece audio interno analog stereo come uscita , l'audio si sente ma la qualità è abbastanza bassa). Qui di seguito vi posto varie informazioni che potrebbero esservi utili. Grazie in anticipo per le vostre risposte .

system HP Pavilion dv6 Notebook PC
/0 bus 3659
/0/0 memory 1MiB BIOS
/0/16 processor Intel(R) Core(TM) i3 CPU M 330
/0/16/17 memory 3MiB L3 cache
/0/16/19 memory 256KiB L2 cache
/0/16/1a memory 32KiB L1 cache
/0/18 memory 32KiB L1 cache
/0/1b memory 4GiB System Memory
/0/1b/0 memory 2GiB SODIMM Synchronous 1067 MHz (0.9
/0/1b/1 memory 2GiB SODIMM Synchronous 1067 MHz (0.9
/0/100 bridge Core Processor DRAM Controller
/0/100/1 bridge Core Processor PCI Express x16 Root P
/0/100/1/0 display G98M [GeForce G105M]
/0/100/1/0.1 multimedia High Definition Audio Controller
/0/100/1a bus 5 Series/3400 Series Chipset USB2 Enh
/0/100/1b multimedia 5 Series/3400 Series Chipset High Def
/0/100/1c bridge 5 Series/3400 Series Chipset PCI Expr
/0/100/1c/0 eth1 network BCM43225 802.11b/g/n
/0/100/1c.1 bridge 5 Series/3400 Series Chipset PCI Expr
/0/100/1c.1/0 eth0 network RTL8111/8168B PCI Express Gigabit Eth
/0/100/1c.4 bridge 5 Series/3400 Series Chipset PCI Expr
/0/100/1c.4/0 bus IEEE 1394 Host Controller
/0/100/1c.4/0.1 generic SD/MMC Host Controller
/0/100/1c.4/0.2 generic Standard SD Host Controller
/0/100/1c.4/0.3 generic MS Host Controller
/0/100/1c.4/0.4 generic xD Host Controller
/0/100/1c.7 bridge 5 Series/3400 Series Chipset PCI Expr
/0/100/1d bus 5 Series/3400 Series Chipset USB2 Enh
/0/100/1e bridge 82801 Mobile PCI Bridge
/0/100/1f bridge Mobile 5 Series Chipset LPC Interface
/0/100/1f.2 scsi0 storage 5 Series/3400 Series Chipset 6 port S
/0/100/1f.2/0 /dev/sda disk 640GB WDC WD6400BEVT-6
/0/100/1f.2/0/1 /dev/sda1 volume 585GiB EXT4 volume
/0/100/1f.2/0/2 /dev/sda2 volume 11GiB Extended partition
/0/100/1f.2/0/2/5 /dev/sda5 volume 11GiB Linux swap / Solaris partition
/0/100/1f.2/1 /dev/cdrom disk CDDVDW TS-L633N
/0/100/1f.3 bus 5 Series/3400 Series Chipset SMBus Co
/0/101 bridge Core Processor QuickPath Architecture
/0/102 bridge Core Processor QuickPath Architecture
/0/103 bridge Core Processor QPI Link 0
/0/104 bridge Core Processor QPI Physical 0
/0/105 bridge Core Processor Reserved
/0/106 bridge Core Processor Reserved
/1 power EV06047