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Hello, I have been trying out some distributions to use with my laptop, and I feel most comfortable with arch, which will be staying here
Laptop: HP EliteBook 8440p
Sound crackling problem DID NOT happen on:
Linux mint 11 with gnome2
Ubuntu 11.04 / 11.10 with unity
Sound crackling problem DID happen on:
Debian lenny
modules:
Module Size Used by
msr 2608 0
cpufreq_stats 3890 0
fuse 66858 2
ipv6 288122 46
snd_hda_codec_hdmi 22821 4
usb_storage 44391 0
uvcvideo 64995 0
uas 8088 0
videodev 85100 1 uvcvideo
media 10565 2 uvcvideo,videodev
v4l2_compat_ioctl32 8644 1 videodev
pata_pcmcia 10093 1
aesni_intel 47378 1
cryptd 8309 1 aesni_intel
aes_x86_64 7508 1 aesni_intel
aes_generic 26138 2 aesni_intel,aes_x86_64
ecb 2073 1
btusb 11385 0
arc4 1410 2
snd_hda_codec_idt 56715 1
nvidia 12069499 33
vboxnetflt 17159 0
vboxdrv 1790690 1 vboxnetflt
bluetooth 150884 1 btusb
cpufreq_powersave 990 0
cpufreq_userspace 2144 0
cpufreq_ondemand 6100 4
pcmcia 36257 1 pata_pcmcia
snd_hda_intel 22410 6
snd_hda_codec 81242 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
snd_hwdep 6357 1 snd_hda_codec
snd_pcm 74368 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_timer 19544 1 snd_pcm
snd 58362 19 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
tpm_infineon 7826 0
e1000e 144580 0
iwlagn 239157 0
joydev 9895 0
soundcore 6210 1 snd
mei 31195 0
iTCO_wdt 11789 0
snd_page_alloc 7153 2 snd_hda_intel,snd_pcm
iTCO_vendor_support 1961 1 iTCO_wdt
yenta_socket 21111 0
mac80211 221963 1 iwlagn
intel_ips 11245 0
intel_agp 10904 0
intel_gtt 14455 1 intel_agp
serio_raw 4294 0
pcspkr 1819 0
psmouse 55501 0
cfg80211 165668 2 iwlagn,mac80211
ppdev 5774 0
sdhci_pci 8887 0
tpm_tis 9311 0
sdhci 22510 1 sdhci_pci
mmc_core 75853 1 sdhci
firewire_ohci 29650 0
firewire_core 50872 1 firewire_ohci
parport_pc 30042 0
acpi_cpufreq 5877 1
tpm 12698 2 tpm_infineon,tpm_tis
parport 31631 2 ppdev,parport_pc
hp_wmi 7738 0
freq_table 2515 3 cpufreq_stats,cpufreq_ondemand,acpi_cpufreq
crc_itu_t 1363 1 firewire_core
sparse_keymap 3120 1 hp_wmi
rfkill 15498 3 bluetooth,cfg80211,hp_wmi
thermal 7799 0
wmi 8475 1 hp_wmi
video 11164 0
processor 24224 1 acpi_cpufreq
hp_accel 13864 0
pcmcia_rsrc 8889 1 yenta_socket
lis3lv02d 10604 1 hp_accel
i2c_core 20460 2 videodev,nvidia
pcmcia_core 12150 3 pcmcia,yenta_socket,pcmcia_rsrc
tpm_bios 5089 1 tpm
evdev 9530 16
ac 2344 0
button 4470 0
container 2429 0
battery 6453 0
input_polldev 2914 1 lis3lv02d
mperf 1275 1 acpi_cpufreq
ext4 375413 4
mbcache 5881 1 ext4
jbd2 70667 1 ext4
crc16 1359 2 bluetooth,ext4
sr_mod 14951 0
sd_mod 28275 6
cdrom 36553 1 sr_mod
usbhid 35352 0
hid 82435 1 usbhid
ahci 20005 5
libahci 19559 1 ahci
libata 166724 3 pata_pcmcia,ahci,libahci
ehci_hcd 40794 0
scsi_mod 132730 5 usb_storage,uas,sr_mod,sd_mod,libata
usbcore 144432 7 usb_storage,uvcvideo,uas,btusb,usbhid,ehci_hcd
lspci:
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 12)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 12)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:16.3 Serial controller: Intel Corporation 5 Series/3400 Series Chipset KT Controller (rev 06)
00:19.0 Ethernet controller: Intel Corporation 82577LM Gigabit Network Connection (rev 06)
00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06)
00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06)
00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 06)
00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 06)
01:00.0 VGA compatible controller: nVidia Corporation GT218 [NVS 3100M] (rev a2)
01:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1)
44:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200 (rev 35)
45:06.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 06)
45:06.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 25)
45:06.2 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev bb)
ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 003: ID 03f0:231d Hewlett-Packard
Bus 001 Device 004: ID 138a:0007 Validity Sensors, Inc. VFS451 Fingerprint Reader
Bus 001 Device 005: ID 04f2:b15e Chicony Electronics Co., Ltd
Bus 002 Device 003: ID 1c4f:0003 SiGma Micro HID controller
I know that this info might be relevant too:
sudo aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: STAC92xx Digital [STAC92xx Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
sudo cat /proc/asound/card0/codec#* | grep Codec
Codec: IDT 92HD75B3X5
Codec: LSI ID 1040
I have been playing with various options for snd-hda-intel. Some of them gave me back my pc speaker (which I don't need), but none of those which I tried removed the crackling on power off
Does anyone have any idea what option to use. Or if this problem is not module related, what to do?
Last edited by Kaurin (2012-01-29 02:15:19)
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You mention playing with various options for snd-hda-intel, did you try 'modprobe snd-hda-intel power_save=0'?
https://wiki.archlinux.org/index.php/AL … g_Playback
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thank you for your quick reply!
options snd-hda-intel power_save=0 model=auto
still happens (reboot 2x after each change to modprobe.conf)
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I use in an initscript's stop():
amixer -q set Master 0% mute
This stops the crackling.
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did you edid /etc/rc.shutdown or some other script?
What would be the "proper" way to do this?
i tried putting "amixer -q set Master 0% mute" in /etc/rc.local.shutdown , but i get some pulseaudio error (something about not being able to connect), and i still get crackles on shutdown
Last edited by Kaurin (2011-12-12 17:44:35)
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If you're using pulseaudio (I'm not), then try adding -c 0 to that amixer command (to bypass pulseaudio).
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cat /etc/conf.d/alsa
# Arguments for alsactl
# example: ALSA_ARGS="--file /var/lib/alsa/asound.state"
ALSA_ARGS="--file /var/lib/alsa/asound.state"# Enables powersaving mode for AC97 and hda_intel audio chips.
# Set to 1 to enable powersaving.
# Set to 0 to disable powersaving (default).
POWERSAVE=1# Whether to save volume levels when stopped ("yes" or "no").
SAVE_VOLUME="yes"# Whether to mute the master volume when stopped ("yes" or "no").
# Useful for bad audio cards which make a noise on system poweroff.
MUTE_VOLUME="no"
Is this useful?
Last edited by Ralgo (2011-12-15 05:25:10)
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brebs' solution reduces the crackle volume
Ralgo, your solution (not using brebs') gets it to a few little pops instead annoying crackles, but you can still hear it
combining both solution does not improve it more then Ralgo's solution on its own
What can I do to eliminate this completely :'(
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Next thing that I would try is to also unload all ALSA modules.
E.g.:
modprobe -r snd_seq_oss
modprobe -r snd_pcm_oss
modprobe -r snd-hda-intel
modprobe -r snd_seq
modprobe -r snd_hda_codec_realtek
modprobe -r snd_hda_codec
You should end up with no snd* modules loaded. You'll have to tweak the above script to suit your own setup.
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I have added those lines to /etc/rc.local.shutdown
This is what i get on reboot/shutdown:
FATAL: Module snd_hda_intel is in use.
FATAL: Module snd_hda_codec is in use.
edit: *crackles*
my lsmod
Module Size Used by
fuse 66858 2
ipv6 288122 46
snd_hda_codec_hdmi 22821 4
uvcvideo 64995 0
videodev 85100 1 uvcvideo
media 10565 2 uvcvideo,videodev
v4l2_compat_ioctl32 8644 1 videodev
aesni_intel 47378 2
nvidia 12069499 33
cryptd 8309 1 aesni_intel
aes_x86_64 7508 1 aesni_intel
aes_generic 26138 2 aesni_intel,aes_x86_64
ecb 2073 1
btusb 11385 0
pata_pcmcia 10093 1
snd_hda_codec_idt 56605 1
ppdev 5774 0
parport_pc 30042 0
joydev 9895 0
arc4 1410 2
iwlagn 239328 0
firewire_ohci 29650 0
snd_hda_intel 22410 6
firewire_core 50872 1 firewire_ohci
snd_hda_codec 81242 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
tpm_infineon 7826 0
crc_itu_t 1363 1 firewire_core
mac80211 222059 1 iwlagn
e1000e 144580 0
pcmcia 36257 1 pata_pcmcia
snd_hwdep 6357 1 snd_hda_codec
snd_pcm 74368 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
iTCO_wdt 11789 0
iTCO_vendor_support 1961 1 iTCO_wdt
intel_agp 10904 0
intel_gtt 14455 1 intel_agp
parport 31631 2 ppdev,parport_pc
intel_ips 11245 0
snd_timer 19544 1 snd_pcm
mei 31195 0
cfg80211 165796 2 iwlagn,mac80211
snd 58362 19 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 6210 1 snd
snd_page_alloc 7153 2 snd_hda_intel,snd_pcm
serio_raw 4294 0
psmouse 55501 0
pcspkr 1819 0
hp_wmi 7738 0
hp_accel 13864 0
yenta_socket 21111 0
lis3lv02d 10604 1 hp_accel
tpm_tis 9311 0
pcmcia_rsrc 8889 1 yenta_socket
tpm 12698 2 tpm_infineon,tpm_tis
sdhci_pci 8887 0
sdhci 22510 1 sdhci_pci
i2c_core 20460 2 videodev,nvidia
sparse_keymap 3120 1 hp_wmi
mmc_core 75853 1 sdhci
pcmcia_core 12150 3 pcmcia,yenta_socket,pcmcia_rsrc
evdev 9530 16
container 2429 0
input_polldev 2914 1 lis3lv02d
video 11164 0
tpm_bios 5089 1 tpm
battery 6453 0
thermal 7799 0
wmi 8475 1 hp_wmi
ac 2344 0
button 4470 0
vboxnetflt 17159 0
vboxdrv 1790690 1 vboxnetflt
bluetooth 150884 1 btusb
rfkill 15498 3 cfg80211,hp_wmi,bluetooth
cpufreq_powersave 990 0
cpufreq_userspace 2144 0
cpufreq_ondemand 6100 4
acpi_cpufreq 5877 1
freq_table 2515 2 cpufreq_ondemand,acpi_cpufreq
processor 24224 1 acpi_cpufreq
mperf 1275 1 acpi_cpufreq
ext4 375413 4
mbcache 5881 1 ext4
jbd2 70667 1 ext4
crc16 1359 2 bluetooth,ext4
sr_mod 14951 0
cdrom 36553 1 sr_mod
sd_mod 28275 6
usbhid 35352 0
hid 82435 1 usbhid
ahci 20005 5
libahci 19559 1 ahci
libata 166724 3 pata_pcmcia,ahci,libahci
ehci_hcd 40762 0
scsi_mod 132826 3 sr_mod,sd_mod,libata
usbcore 144432 5 uvcvideo,btusb,usbhid,ehci_hcd
Last edited by Kaurin (2011-12-15 16:26:19)
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try blacklisting pcspkr
GRUB_CMDLINE_LINUX
modprobe.blacklist=pcspkr
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i have added your line to grub, ran grub-mkconfig, rebooted 2x, same thing
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bump. I have just upgraded to 3.2.1-1 . the problem persists.
Current lsmod:
Module Size Used by
fuse 66922 2
bnep 9181 2
ipv6 288511 50
uvcvideo 64311 0
videodev 82069 1 uvcvideo
media 10597 2 uvcvideo,videodev
v4l2_compat_ioctl32 8316 1 videodev
snd_hda_codec_hdmi 24121 4
pata_pcmcia 10093 1
arc4 1410 2
joydev 9895 0
tpm_infineon 7826 0
snd_hda_codec_idt 56637 1
nvidia 12066843 43
ppdev 5774 0
iwlwifi 247876 0
mac80211 229016 1 iwlwifi
firewire_ohci 31669 0
parport_pc 30170 0
tpm_tis 9311 0
tpm 12698 2 tpm_infineon,tpm_tis
cfg80211 172260 2 iwlwifi,mac80211
pcmcia 36257 1 pata_pcmcia
iTCO_wdt 11885 0
hp_wmi 7738 0
sparse_keymap 3120 1 hp_wmi
snd_hda_intel 23311 2
snd_hda_codec 89032 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
sdhci_pci 10884 0
sdhci 23274 1 sdhci_pci
mmc_core 80878 2 sdhci_pci,sdhci
serio_raw 4429 0
hp_accel 16360 0
wmi 8475 1 hp_wmi
psmouse 61311 0
e1000e 144248 0
snd_hwdep 6389 1 snd_hda_codec
intel_ips 11213 0
evdev 9530 16
snd_pcm 74780 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_timer 19544 1 snd_pcm
snd 59214 11 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 6210 1 snd
yenta_socket 21143 0
parport 31983 2 ppdev,parport_pc
firewire_core 50872 1 firewire_ohci
tpm_bios 5089 1 tpm
lis3lv02d 10875 1 hp_accel
intel_agp 10904 0
iTCO_vendor_support 1961 1 iTCO_wdt
pcmcia_rsrc 8889 1 yenta_socket
pcmcia_core 12150 3 pcmcia,yenta_socket,pcmcia_rsrc
crc_itu_t 1363 1 firewire_core
mei 32414 0
snd_page_alloc 7153 2 snd_hda_intel,snd_pcm
thermal 7799 0
video 11164 0
container 2429 0
i2c_core 20492 2 videodev,nvidia
intel_gtt 14519 1 intel_agp
vboxnetflt 17159 0
input_polldev 2914 1 lis3lv02d
vboxdrv 1790690 1 vboxnetflt
ac 2344 0
battery 6453 0
button 4470 0
bluetooth 151999 7 bnep
rfkill 15498 5 cfg80211,hp_wmi,bluetooth
cpufreq_powersave 990 0
cpufreq_userspace 2144 0
cpufreq_ondemand 6164 4
acpi_cpufreq 5877 1
freq_table 2515 2 cpufreq_ondemand,acpi_cpufreq
processor 25582 1 acpi_cpufreq
mperf 1275 1 acpi_cpufreq
ext4 417052 4
mbcache 5881 1 ext4
jbd2 71243 1 ext4
crc16 1359 2 bluetooth,ext4
sr_mod 14951 0
sd_mod 28307 6
cdrom 36649 1 sr_mod
usbhid 35352 0
hid 83267 1 usbhid
ahci 20037 5
libahci 19559 1 ahci
libata 166654 3 pata_pcmcia,ahci,libahci
scsi_mod 133443 3 sr_mod,sd_mod,libata
ehci_hcd 40698 0
usbcore 146241 4 uvcvideo,usbhid,ehci_hcd
usb_common 954 1 usbcore
I have also updated my rc,local.shutdown to look like this:
#!/bin/bash
#
# /etc/rc.local.shutdown: Local shutdown script.
#
modprobe -r snd_hda_intel
modprobe -r snd_hda_codec_idt
modprobe -r snd_hda_codec_hdmi
modprobe -r snd_hda_codec
modprobe -r snd_hwdep
modprobe -r snd_pcm
modprobe -r snd_timer
modprobe -r snd soundcore
modprobe -r snd_page_alloc
modprobe -r snd
Note: this shutdown script does not work (snd_hda_intel in use). I have put the modules in this particular order, because I managed to unload them from init 1 in that order. After rebooting from init 1 after unloading those modules, the problem still persisted.
Any ideas?
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snd_hda_intel in use
So, kill whatever's using it. Check with:
fuser -fv /dev/snd/* /dev/dsp*
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As I said: I have manually removed all those modules from init 1 and then rebooted without success. It's not just the sound modules
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Installing pulseaudio could help - at some point my PCs started crackling when resuming, they don't do it when I'm running pulseaudio, and Ubuntu/Mint use pulseaudio, Debian probably doesn't.
-edit-
You mention some pulseaudio error, so perhaps you are running it. If that's the case, you can use "su your_username -c "amixer -q set Master 0% mute"" to mute the card on shutdown.
Last edited by lucke (2012-01-21 08:13:30)
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I'm using it
[milos@KaurinovCNN ~]$ ps axu | grep pulse
milos 1926 0.0 0.1 434660 7616 ? Sl 00:41 0:09 /usr/bin/pulseaudio --start --log-target=syslog
milos 1930 0.0 0.0 68896 2604 ? S 00:41 0:00 /usr/lib/pulse/gconf-helper
milos 6577 0.0 0.0 8652 1052 pts/0 S+ 09:14 0:00 grep --color=auto pulse
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You're not being very helpful.
You have to make sure that pulseaudio is stopped, before the ALSA kernel modules can be unloaded. Isn't this obvious?
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brebs. I guess you don't know what init 1 is. When you go to init 1, you are in single usermode with only 1 instance of shell and no other services/processes active.
here is an output of ps axu from init 1
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 4196 732 ? Ss 00:40 0:00 init [s]
root 2 0.0 0.0 0 0 ? S 00:40 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S 00:40 0:00 [ksoftirqd/0]
root 6 0.0 0.0 0 0 ? S 00:40 0:00 [migration/0]
root 21 0.0 0.0 0 0 ? S< 00:40 0:00 [cpuset]
root 22 0.0 0.0 0 0 ? S< 00:40 0:00 [khelper]
root 23 0.0 0.0 0 0 ? S 00:40 0:00 [kdevtmpfs]
root 24 0.0 0.0 0 0 ? S< 00:40 0:00 [netns]
root 25 0.0 0.0 0 0 ? S 00:40 0:00 [sync_supers]
root 26 0.0 0.0 0 0 ? S 00:40 0:00 [bdi-default]
root 27 0.0 0.0 0 0 ? S< 00:40 0:00 [kblockd]
root 29 0.0 0.0 0 0 ? S 00:41 0:00 [khungtaskd]
root 30 0.0 0.0 0 0 ? S 00:41 0:00 [kswapd0]
root 31 0.0 0.0 0 0 ? SN 00:41 0:00 [ksmd]
root 32 0.0 0.0 0 0 ? SN 00:41 0:00 [khugepaged]
root 33 0.0 0.0 0 0 ? S 00:41 0:00 [fsnotify_mark]
root 34 0.0 0.0 0 0 ? S< 00:41 0:00 [crypto]
root 36 0.0 0.0 0 0 ? S< 00:41 0:00 [kthrotld]
root 161 0.0 0.0 0 0 ? S 00:41 0:00 [khubd]
root 166 0.0 0.0 0 0 ? S< 00:41 0:00 [ata_sff]
root 167 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_0]
root 168 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_1]
root 169 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_2]
root 170 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_3]
root 171 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_4]
root 172 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_5]
root 208 0.0 0.0 0 0 ? S 00:41 0:00 [jbd2/sda7-8]
root 209 0.0 0.0 0 0 ? S< 00:41 0:00 [ext4-dio-unwrit]
root 332 0.0 0.0 0 0 ? S< 00:41 0:00 [iprt]
root 408 0.0 0.0 0 0 ? S< 00:41 0:00 [firewire]
root 409 0.0 0.0 0 0 ? S 00:41 0:00 [ips-adjust]
root 410 0.0 0.0 0 0 ? S 00:41 0:00 [ips-monitor]
root 412 0.0 0.0 0 0 ? S< 00:41 0:00 [kpsmoused]
root 413 0.0 0.0 0 0 ? S 00:41 0:00 [pccardd]
root 441 0.0 0.0 0 0 ? S< 00:41 0:00 [cfg80211]
root 456 0.0 0.0 0 0 ? S< 00:41 0:00 [iwlwifi]
root 460 0.0 0.0 0 0 ? S< 00:41 0:00 [hd-audio0]
root 474 0.0 0.0 0 0 ? S< 00:41 0:00 [hd-audio1]
root 524 0.0 0.0 0 0 ? S 00:41 0:00 [scsi_eh_6]
root 633 0.0 0.0 0 0 ? S 00:41 0:00 [jbd2/sda5-8]
root 634 0.0 0.0 0 0 ? S< 00:41 0:00 [ext4-dio-unwrit]
root 635 0.0 0.0 0 0 ? S 00:41 0:00 [jbd2/sda9-8]
root 636 0.0 0.0 0 0 ? S< 00:41 0:00 [ext4-dio-unwrit]
root 637 0.0 0.0 0 0 ? S 00:41 0:00 [jbd2/sda8-8]
root 638 0.0 0.0 0 0 ? S< 00:41 0:00 [ext4-dio-unwrit]
root 1198 0.0 0.0 0 0 ? S 00:41 0:00 [flush-8:0]
root 2878 0.0 0.0 0 0 ? S 08:51 0:00 [migration/1]
root 2880 0.0 0.0 0 0 ? S 08:51 0:00 [ksoftirqd/1]
root 2882 0.0 0.0 0 0 ? S 08:51 0:00 [migration/2]
root 2884 0.0 0.0 0 0 ? S 08:51 0:00 [ksoftirqd/2]
root 2886 0.0 0.0 0 0 ? S 08:51 0:00 [migration/3]
root 2888 0.0 0.0 0 0 ? S 08:51 0:00 [ksoftirqd/3]
root 2890 0.0 0.0 0 0 ? S 08:51 0:00 [irq/45-mei]
root 2912 0.0 0.0 0 0 ? S 08:51 0:00 [kworker/u:39]
root 2914 0.0 0.0 0 0 ? S 08:51 0:00 [kworker/2:0]
root 2915 0.0 0.0 0 0 ? S 08:51 0:00 [kworker/1:0]
root 2916 0.0 0.0 0 0 ? S 08:51 0:01 [kworker/1:1]
root 2918 0.0 0.0 0 0 ? S 08:51 0:00 [kworker/3:1]
root 5550 0.0 0.0 0 0 ? S 09:11 0:00 [kworker/u:0]
root 6119 0.0 0.0 0 0 ? S 09:13 0:00 [kworker/3:2]
root 6264 0.0 0.0 0 0 ? S 09:13 0:00 [watchdog/0]
root 6265 0.0 0.0 0 0 ? S 09:13 0:00 [watchdog/1]
root 6266 0.0 0.0 0 0 ? S 09:13 0:00 [watchdog/2]
root 6267 0.0 0.0 0 0 ? S 09:13 0:00 [watchdog/3]
root 15877 0.0 0.0 0 0 ? S 09:26 0:00 [kworker/0:1]
root 15950 0.0 0.0 0 0 ? S 09:31 0:00 [kworker/2:1]
root 15983 0.0 0.0 0 0 ? S 09:32 0:00 [kworker/0:3]
root 16167 0.0 0.0 0 0 ? S 09:37 0:00 [scsi_eh_8]
root 16168 0.0 0.0 0 0 ? S 09:37 0:00 [usb-storage]
root 16190 0.0 0.0 0 0 ? S 09:37 0:00 [kworker/0:0]
root 16199 0.0 0.0 0 0 ? S 09:38 0:00 [kworker/u:1]
root 16313 0.0 0.0 0 0 ? S< 09:38 0:00 [krfcommd]
root 16995 0.0 0.0 0 0 ? S 09:38 0:00 [kworker/3:0]
root 17006 0.0 0.0 0 0 ? S 09:38 0:00 [kworker/0:2]
root 17016 0.2 0.0 11320 1720 ? Ss 09:38 0:00 /lib/udev/udevd --daemon
root 17086 0.0 0.0 11268 1248 ? S 09:38 0:00 /lib/udev/udevd --daemon
root 17087 0.0 0.0 11236 1296 ? S 09:38 0:00 /lib/udev/udevd --daemon
root 17349 0.0 0.0 4196 104 tty1 Ss 09:38 0:00 init [s]
root 17350 0.6 0.1 18672 5156 tty1 S 09:38 0:00 -bash
root 17404 0.0 0.0 10736 1228 tty1 R+ 09:39 0:00 ps axu
and pstree
init-+-init---bash---pstree
`-udevd---2*[udevd]
As you can see - only kernel processes udevd and bash are active.
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Is it this same sound like sound after this commend: aplay -d 1 /dev/zero ?
I had similar problem after wakeup from suspend. I removed this line from /etc/pm/sleep.d/90alsa. I know you have crackling after poweroff but maybe you have also this line in some poweroff script.
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The sound is very similar, only it lasts around 2.5 seconds and is more intense (like multiple instances of it). I have went to /etc and ran
$ sudo grep -r aplay .
./speech-dispatcher/modules/espeak-mbrola-generic.conf:# utility (play, aplay, paplay for OSS, ALSA or Pulse)
./speech-dispatcher/modules/espeak-mbrola-generic.conf:# with play, paplay or similar.
./speech-dispatcher/modules/espeak-generic.conf:# IMPORTANT: The audio output method relies on ALSA Player (aplay)
./speech-dispatcher/modules/espeak-generic.conf:# or replace the aplay command in the GenericExecuteString below
./speech-dispatcher/modules/swift-generic.conf:# utility (play, aplay, paplay for OSS, ALSA or Pulse)
./speech-dispatcher/modules/swift-generic.conf:# with play, paplay or similar.
grep: ./httpd/run: No such file or directory
./pm/sleep.d/90alsa:aplay -d 1 /dev/zero
Binary file ./ld.so.cache matches
So, i don't see it anywhere except in /etc//pm/90alsa. I have commented it out, but, ofcourse, it still happens on reboot/shutdown
Last edited by Kaurin (2012-01-21 11:35:05)
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Ok. I have found a way to stop the crackling noise. There is probably a better way to solve this (maybe options for the snd_hda module or something similar). Anyway, you will find my solution below:
add the following lines to the end of /etc/rc.local.shutdown
amixer set Master mute
reboot to try it out
edit: you will have to unmute upon boot, or put "amixer set Master unmute" in one of the startup scripts because sound will be muted on boot
Last edited by Kaurin (2012-01-29 02:19:30)
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