On 11/11/08 18:55, Jaroslav Kysela wrote:
On Tue, 11 Nov 2008, Jelle de Jong wrote:
Jaroslav Kysela wrote:
On Tue, 11 Nov 2008, Takashi Iwai wrote:
Almost all devices can be managed with udev rules, that is where the
system is designed for, there are also alsa rules in there, if they
don't work what is wrong then? is it an alsa issue, or udev, what are
the dependencies when alsa uses hardware. How are the /dev/snd/* devices
used and what is the /proc/asound/* for ?
The card index mechanism in ALSA was introduced much before udev
was born. It's just a legacy mechanism, but it's hard to kill without
breaking the running system, unfortunately.
Note that you can identify your card via the text identification (check
/proc/asound/cards to get it in []). You can set this identification in
the module insert time and use for example 'hw:Intel' in your apps without
bothering with indexes.
The missing part is the modification of this text identification using
sysfs at runtime for udev. Some time ago, I was trying to add this setup
to /sys/class/sound, but the sysfs core code was not prepared for this
change. I'll try to check the situation again.
As response to:
http://mailman.alsa-project.org/pipermail/alsa-devel/2008-November/012366.html
I am not sure if it is good practice to repose to an RFC if so please
tell me then we will continue the discussion in the RFC thread.
Thank you Jaroslav for creating the patch this is really appreciated, if
all things work I will send you some dutch stroopwafels :-D
I am just curious how you patch can be used with udev? What did you have
in mind?
Would something like this be possible:
SUBSYSTEM=="sound", ACTION="add" KERNELS=="3-1",
NAME="snd/by-id/audiodevice0"
SUBSYSTEM=="sound", ACTION="add" KERNELS=="3-2",
NAME="snd/by-id/audiodevice1"
No, something like this:
SUBSYSTEM=="sound", ACTION=="add", KERNEL=="controlC*", KERNELS=="3-2", \
ATTR{device/id}="audiodevice1"
pcm.!default {
type plug
slave.pcm dmixer
}
pcm.dmixer {
type dmix
ipc_key 1024
slave.pcm hw:audiodevice0
}
This looks OK.
Jaroslav
Hello everybody,
It has been a while and I have been waiting until the patch made it into
Debian and now it finally has, so I started testing and it seems to work
that the patch works and I am very grateful for it.
I still have list of issues, but I will make new treads for them now.
Thanks again,
Best regards,
Jelle de Jong
http://mailman.alsa-project.org/pipermail/alsa-devel/2008-November/012366.html
------------------------------------------------------------------------
echo 'SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.1", KERNEL=="controlC[0-9]", NAME="snd/controlC4"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.2", KERNEL=="controlC[0-9]", NAME="snd/controlC5"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.3", KERNEL=="controlC[0-9]", NAME="snd/controlC6"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.4", KERNEL=="controlC[0-9]", NAME="snd/controlC7"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.1", KERNEL=="pcmC[0-9]D0c", NAME="snd/pcmC4D0c"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.2", KERNEL=="pcmC[0-9]D0c", NAME="snd/pcmC5D0c"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.3", KERNEL=="pcmC[0-9]D0c", NAME="snd/pcmC6D0c"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.4", KERNEL=="pcmC[0-9]D0c", NAME="snd/pcmC7D0c"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.1", KERNEL=="pcmC[0-9]D0p", NAME="snd/pcmC4D0p"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.2", KERNEL=="pcmC[0-9]D0p", NAME="snd/pcmC5D0p"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.3", KERNEL=="pcmC[0-9]D0p", NAME="snd/pcmC6D0p"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.4", KERNEL=="pcmC[0-9]D0p", NAME="snd/pcmC7D0p"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.1", KERNEL=="controlC[0-9]", ATTR{device/id}="audiodevice1"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.2", KERNEL=="controlC[0-9]", ATTR{device/id}="audiodevice2"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.3", KERNEL=="controlC[0-9]", ATTR{device/id}="audiodevice3"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.4", KERNEL=="controlC[0-9]", ATTR{device/id}="audiodevice4"' | sudo tee /etc/udev/rules.d/10-persistent-sound.rules
sudo chmod 600 /etc/udev/rules.d/10-persistent-sound.rules
sudo cat /etc/udev/rules.d/10-persistent-sound.rules
------------------------------------------------------------------------
echo 'SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.1", MODE="0660", OWNER="root", GROUP="jelle"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.2", MODE="0660", OWNER="root", GROUP="jelle"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.3", MODE="0660", OWNER="root", GROUP="jelle"
SUBSYSTEM=="sound", ACTION=="add", KERNELS=="1-2.4", MODE="0660", OWNER="root", GROUP="jelle"' | sudo tee /etc/udev/rules.d/92-persistent-sound.rules
sudo chmod 600 /etc/udev/rules.d/92-persistent-sound.rules
sudo cat /etc/udev/rules.d/92-persistent-sound.rules
------------------------------------------------------------------------
sudo udevadm control --reload-rules
tail -n 1000 /var/log/syslog
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid rule '/etc/udev/rules.d/10-persistent-sound.rules:16'
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid ATTRS operation
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid rule '/etc/udev/rules.d/10-persistent-sound.rules:17'
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid ATTRS operation
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid rule '/etc/udev/rules.d/10-persistent-sound.rules:18'
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid ATTRS operation
Jul 27 12:48:38 debian-eeepc udevd[1001]: invalid rule '/etc/udev/rules.d/10-persistent-sound.rules:19'
------------------------------------------------------------------------
$ ls -hal /dev/snd/
total 0
drwxr-xr-x 2 root root 400 2009-07-27 12:29 .
drwxr-xr-x 14 root root 4.2K 2009-07-27 12:29 ..
crw-rw----+ 1 root audio 116, 0 2009-07-27 12:18 controlC0
crw-rw----+ 1 root jelle 116, 32 2009-07-27 12:29 controlC1
crw-rw----+ 1 root jelle 116, 64 2009-07-27 12:29 controlC2
crw-rw----+ 1 root jelle 116, 96 2009-07-27 12:29 controlC3
crw-rw----+ 1 root jelle 116, 128 2009-07-27 12:29 controlC4
crw-rw----+ 1 root audio 116, 4 2009-07-27 12:18 hwC0D0
crw-rw----+ 1 root audio 116, 24 2009-07-27 12:18 pcmC0D0c
crw-rw----+ 1 root audio 116, 16 2009-07-27 12:18 pcmC0D0p
crw-rw----+ 1 root jelle 116, 56 2009-07-27 12:29 pcmC1D0c
crw-rw----+ 1 root jelle 116, 48 2009-07-27 12:29 pcmC1D0p
crw-rw----+ 1 root jelle 116, 88 2009-07-27 12:29 pcmC2D0c
crw-rw----+ 1 root jelle 116, 80 2009-07-27 12:29 pcmC2D0p
crw-rw---- 1 root jelle 116, 120 2009-07-27 12:29 pcmC3D0c
crw-rw----+ 1 root jelle 116, 112 2009-07-27 12:29 pcmC3D0p
crw-rw----+ 1 root jelle 116, 152 2009-07-27 12:29 pcmC4D0c
crw-rw----+ 1 root jelle 116, 144 2009-07-27 12:29 pcmC4D0p
crw-rw----+ 1 root audio 116, 1 2009-07-27 12:18 seq
crw-rw----+ 1 root audio 116, 33 2009-07-27 12:18 timer
$ cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xf7eb8000 irq 16
1 [default ]: USB-Audio - USB AUDIO
USB AUDIO at usb-0000:00:1d.7-2.1, full speed
2 [default_1 ]: USB-Audio - USB AUDIO
USB AUDIO at usb-0000:00:1d.7-2.2, full speed
3 [default_2 ]: USB-Audio - USB AUDIO
USB AUDIO at usb-0000:00:1d.7-2.3, full speed
4 [default_3 ]: USB-Audio - USB AUDIO
USB AUDIO at usb-0000:00:1d.7-2.4, full speed
------------------------------------------------------------------------
$ udevinfo info --attribute-walk --name=/dev/snd/controlC2
the program '/bin/bash' called 'udevinfo', it should use 'udevadm info <options>', this will stop working in a future release
Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.
looking at device '/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2.2/1-2.2:1.0/sound/card2/controlC2':
KERNEL=="controlC2"
SUBSYSTEM=="sound"
DRIVER==""
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2.2/1-2.2:1.0/sound/card2':
KERNELS=="card2"
SUBSYSTEMS=="sound"
DRIVERS==""
ATTRS{id}=="default_1"
ATTRS{number}=="2"
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2.2/1-2.2:1.0':
KERNELS=="1-2.2:1.0"
SUBSYSTEMS=="usb"
DRIVERS=="snd-usb-audio"
ATTRS{bInterfaceNumber}=="00"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bNumEndpoints}=="00"
ATTRS{bInterfaceClass}=="01"
ATTRS{bInterfaceSubClass}=="01"
ATTRS{bInterfaceProtocol}=="00"
ATTRS{modalias}=="usb:v1130pF211d010Bdc00dsc00dp00ic01isc01ip00"
ATTRS{supports_autosuspend}=="0"
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-2/1-2.2':
KERNELS=="1-2.2"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{configuration}==""
ATTRS{bNumInterfaces}==" 5"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="80"
ATTRS{bMaxPower}=="500mA"
ATTRS{urbnum}=="11825"
ATTRS{idVendor}=="1130"
ATTRS{idProduct}=="f211"
ATTRS{bcdDevice}=="010b"
ATTRS{bDeviceClass}=="00"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="8"
ATTRS{speed}=="12"
ATTRS{busnum}=="1"
ATTRS{devnum}=="21"
ATTRS{version}==" 1.10"
ATTRS{maxchild}=="0"
ATTRS{quirks}=="0x0"
ATTRS{authorized}=="1"
ATTRS{product}=="USB AUDIO "
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1/1-2':
KERNELS=="1-2"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{configuration}==""
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="e0"
ATTRS{bMaxPower}=="100mA"
ATTRS{urbnum}=="65"
ATTRS{idVendor}=="058f"
ATTRS{idProduct}=="6254"
ATTRS{bcdDevice}=="0100"
ATTRS{bDeviceClass}=="09"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="01"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{speed}=="480"
ATTRS{busnum}=="1"
ATTRS{devnum}=="19"
ATTRS{version}==" 2.00"
ATTRS{maxchild}=="4"
ATTRS{quirks}=="0x0"
ATTRS{authorized}=="1"
looking at parent device '/devices/pci0000:00/0000:00:1d.7/usb1':
KERNELS=="usb1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{configuration}==""
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bmAttributes}=="e0"
ATTRS{bMaxPower}==" 0mA"
ATTRS{urbnum}=="108"
ATTRS{idVendor}=="1d6b"
ATTRS{idProduct}=="0002"
ATTRS{bcdDevice}=="0206"
ATTRS{bDeviceClass}=="09"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{bNumConfigurations}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{speed}=="480"
ATTRS{busnum}=="1"
ATTRS{devnum}=="1"
ATTRS{version}==" 2.00"
ATTRS{maxchild}=="8"
ATTRS{quirks}=="0x0"
ATTRS{authorized}=="1"
ATTRS{manufacturer}=="Linux 2.6.30-1-686 ehci_hcd"
ATTRS{product}=="EHCI Host Controller"
ATTRS{serial}=="0000:00:1d.7"
ATTRS{authorized_default}=="1"
looking at parent device '/devices/pci0000:00/0000:00:1d.7':
KERNELS=="0000:00:1d.7"
SUBSYSTEMS=="pci"
DRIVERS=="ehci_hcd"
ATTRS{vendor}=="0x8086"
ATTRS{device}=="0x27cc"
ATTRS{subsystem_vendor}=="0x1043"
ATTRS{subsystem_device}=="0x830f"
ATTRS{class}=="0x0c0320"
ATTRS{irq}=="23"
ATTRS{local_cpus}=="ffffffff"
ATTRS{local_cpulist}=="0-31"
ATTRS{modalias}=="pci:v00008086d000027CCsv00001043sd0000830Fbc0Csc03i20"
ATTRS{broken_parity_status}=="0"
ATTRS{msi_bus}==""
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""
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