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Zdravim , občas se mi při spuštění pc stane že alsa nahlásí chybu a místo aby zvuk přehrávala zvuková karta tak zvuk hraje skrze pcspeaker. Zde je LSMOD :

Module                  Size  Used by
ipv6                  260340  10
bridge                 49556  0
stp                     4100  1 bridge
llc                     7180  2 bridge,stp
bnep                   12416  2
sco                    11908  2
l2cap                  23552  3 bnep
bluetooth              54372  5 bnep,sco,l2cap
rfkill_input            6656  0
nls_cp437               7424  1
vfat                   12800  1
fat                    50720  1 vfat
hid_a4tech              4608  0
usbhid                 36640  0
hid                    40704  2 hid_a4tech,usbhid
arc4                    3712  2
ecb                     4608  2
b43                   129948  0
joydev                 11712  0
mac80211              161184  1 b43
usb_storage            95552  0
snd_seq_oss            31872  0
snd_seq_midi_event      8192  1 snd_seq_oss
snd_seq                49968  4 snd_seq_oss,snd_seq_midi_event
snd_seq_device          8204  2 snd_seq_oss,snd_seq
cfg80211               31760  1 mac80211
input_polldev           5256  1 b43
snd_pcm_oss            40192  0
snd_mixer_oss          16512  1 snd_pcm_oss
ppdev                   9348  0
rfkill                 11596  3 rfkill_input,b43
led_class               5508  1 b43
snd_intel8x0m          15500  0
uhci_hcd               24592  0
parport_pc             37700  1
lp                     11108  0
parport                33004  3 ppdev,parport_pc,lp
sg                     26804  0
ohci1394               31280  0
snd_intel8x0           30876  3
snd_ac97_codec        102308  2 snd_intel8x0m,snd_intel8x0
wmi                     7848  0
snd_pcsp               11048  1
psmouse                55828  0
serio_raw               7172  0
video                  18704  5
output                  4608  1 video
container               5248  0
ac97_bus                3584  1 snd_ac97_codec
snd_pcm                70020  5 snd_pcm_oss,snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcsp
ieee1394               79940  1 ohci1394
tg3                   122116  0
nvidia               7092040  26
snd_timer              21384  2 snd_seq,snd_pcm
ssb                    40964  1 b43
iTCO_wdt               12836  0
iTCO_vendor_support     4996  1 iTCO_wdt
yenta_socket           25996  1
rsrc_nonstatic         13056  1 yenta_socket
snd                    50980  19 snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_intel8x0m,snd_intel8x0,snd_ac97_codec,snd_pcsp,snd_pcm,snd_timer
soundcore               8160  1 snd
snd_page_alloc         10120  3 snd_intel8x0m,snd_intel8x0,snd_pcm
ehci_hcd               37388  0
i2c_core               22804  1 nvidia
pcmcia                 35532  2 b43,ssb
pcmcia_core            34452  5 b43,ssb,yenta_socket,rsrc_nonstatic,pcmcia
libphy                 19456  1 tg3
usbcore               136848  5 usbhid,usb_storage,uhci_hcd,ehci_hcd
intel_agp              27836  1
agpgart                31572  2 nvidia,intel_agp
shpchp                 34068  0
pci_hotplug            28064  1 shpchp
thermal                17180  0
processor              41388  2 thermal
evdev                  11296  13
fan                     6276  0
button                  7824  0
battery                12036  0
ac                      6020  0
vboxdrv               115368  0
cpufreq_powersave       3456  0
cpufreq_userspace       4996  1
p4_clockmod             6084  1
speedstep_lib           6148  1 p4_clockmod
freq_table              5632  1 p4_clockmod
fuse                   53020  6
rtc_cmos               12332  0
rtc_core               17564  1 rtc_cmos
rtc_lib                 4480  1 rtc_core
sd_mod                 27036  6
sr_mod                 16708  0
cdrom                  35360  1 sr_mod
pata_acpi               6016  0
ata_generic             6788  0
ata_piix               23300  5
libata                157856  3 pata_acpi,ata_generic,ata_piix
scsi_mod              102164  5 usb_storage,sg,sd_mod,sr_mod,libata
reiserfs              231424  1
 

Zde lspci :

00:00.0 Host bridge: Intel Corporation 82865G/PE/P DRAM Controller/Host-Hub Interface (rev 02)
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, fast devsel, latency 0
    Memory at d8000000 (32-bit, prefetchable) [size=128M]
    Capabilities: <access denied>
    Kernel driver in use: agpgart-intel
    Kernel modules: intel-agp

00:01.0 PCI bridge: Intel Corporation 82865G/PE/P PCI to AGP Controller (rev 02) (prog-if 00 [Normal decode])
    Flags: bus master, 66MHz, fast devsel, latency 96
    Bus: primary=00, secondary=01, subordinate=01, sec-latency=80
    Memory behind bridge: d1000000-d1ffffff
    Prefetchable memory behind bridge: e0000000-efffffff
    Kernel modules: shpchp

00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 16
    I/O ports at 1cc0 [size=32]
    Kernel driver in use: uhci_hcd
    Kernel modules: uhci-hcd

00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 19
    I/O ports at 1ce0 [size=32]
    Kernel driver in use: uhci_hcd
    Kernel modules: uhci-hcd

00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 18
    I/O ports at 2000 [size=32]
    Kernel driver in use: uhci_hcd
    Kernel modules: uhci-hcd

00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02) (prog-if 20 [EHCI])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 23
    Memory at d0000000 (32-bit, non-prefetchable) [size=1K]
    Capabilities: <access denied>
    Kernel driver in use: ehci_hcd
    Kernel modules: ehci-hcd

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0
    Bus: primary=00, secondary=03, subordinate=07, sec-latency=32
    I/O behind bridge: 00003000-00003fff
    Memory behind bridge: d2000000-d20fffff
    Prefetchable memory behind bridge: 50000000-53ffffff
    Kernel modules: shpchp

00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge (rev 02)
    Flags: bus master, medium devsel, latency 0
    Kernel modules: intel-rng, iTCO_wdt

00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 18
    I/O ports at 01f0 [size=8]
    I/O ports at 03f4 [size=1]
    I/O ports at 0170 [size=8]
    I/O ports at 0374 [size=1]
    I/O ports at 2060 [size=16]
    Memory at 54000000 (32-bit, non-prefetchable) [size=1K]
    Kernel driver in use: ata_piix
    Kernel modules: ata_piix, piix

00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 17
    I/O ports at 1400 [size=256]
    I/O ports at 1c80 [size=64]
    Memory at d0000c00 (32-bit, non-prefetchable) [size=512]
    Memory at d0000800 (32-bit, non-prefetchable) [size=256]
    Capabilities: <access denied>
    Kernel driver in use: Intel ICH
    Kernel modules: snd-intel8x0

00:1f.6 Modem: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Modem Controller (rev 02) (prog-if 00 [Generic])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 0, IRQ 17
    I/O ports at 1800 [size=256]
    I/O ports at 1c00 [size=128]
    Capabilities: <access denied>
    Kernel driver in use: Intel ICH Modem
    Kernel modules: snd-intel8x0m

01:00.0 VGA compatible controller: nVidia Corporation NV36 [GeForce FX Go5700] (rev a1) (prog-if 00 [VGA controller])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, 66MHz, medium devsel, latency 248, IRQ 16
    Memory at d1000000 (32-bit, non-prefetchable) [size=16M]
    Memory at e0000000 (32-bit, prefetchable) [size=256M]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: <access denied>
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nvidia

03:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5788 Gigabit Ethernet (rev 03)
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 17
    Memory at d2000000 (32-bit, non-prefetchable) [size=64K]
    Expansion ROM at <ignored> [disabled]
    Capabilities: <access denied>
    Kernel driver in use: tg3
    Kernel modules: tg3

03:01.0 CardBus bridge: ENE Technology Inc CB1410 Cardbus Controller (rev 01)
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 168, IRQ 18
    Memory at d2017000 (32-bit, non-prefetchable) [size=4K]
    Bus: primary=03, secondary=04, subordinate=07, sec-latency=176
    Memory window 0: 50000000-53fff000 (prefetchable)
    Memory window 1: 58000000-5bfff000
    I/O window 0: 00003000-000030ff
    I/O window 1: 00003400-000034ff
    16-bit legacy interface ports at 0001
    Kernel driver in use: yenta_cardbus
    Kernel modules: yenta_socket

03:02.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A IEEE-1394a-2000 Controller (PHY/Link) (prog-if 10 [OHCI])
    Subsystem: Acer Incorporated [ALI] Device 0045
    Flags: bus master, medium devsel, latency 32, IRQ 19
    Memory at d2016000 (32-bit, non-prefetchable) [size=2K]
    Memory at d2010000 (32-bit, non-prefetchable) [size=16K]
    Capabilities: <access denied>
    Kernel driver in use: ohci1394
    Kernel modules: ohci1394

03:03.0 Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 03)
    Subsystem: Wistron NeWeb Corp. TravelMate 290E WLAN Mini-PCI Card
    Flags: bus master, fast devsel, latency 32, IRQ 20
    Memory at d2014000 (32-bit, non-prefetchable) [size=8K]
    Kernel driver in use: b43-pci-bridge
    Kernel modules: ssb

 

APLAY - L

**** List of PLAYBACK Hardware Devices ****
card 0: pcsp [pcsp], device 0: pcspeaker [pcsp]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ICH5 [Intel ICH5], device 0: Intel ICH [Intel ICH5]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ICH5 [Intel ICH5], device 4: Intel ICH - IEC958 [Intel ICH5 - IEC958]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Modem [Intel ICH5 Modem], device 0: Intel ICH - Modem [Intel ICH5 Modem - Modem]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
 

Zde :  cat /proc/asound/modules

 0 snd_pcsp
 1 snd_intel8x0
 2 snd_intel8x0m
 

Takže je jasné že jako výchozí dá PCSPEAKER , ale ne vždy , jen 1x za cca 15 startů.

zkoušel sem podle návodu na  https://help.ubuntu.com/community/SoundTroubleshooting

vytvořit /etc/modprobe.d/alsa-base a do něj dát

options snd_intel8x0 index=0
options snd_intel8x0m index=1
options snd_pcsp index=2

ale žádná změna , občas stále je výchozí pcspeaker

uname -a

Linux NB-Pepe 2.6.28-ARCH #1 SMP PREEMPT Tue Mar 17 06:42:43 UTC 2009 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux
 

Archlinux  current

Napadá Vás něco ?