Re: Fwd: [linux-audio-user] Real-time kernel

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Chuckk Hubbard wrote:
On 6/24/07, Mark Knecht <markknecht@xxxxxxxxx> wrote:
On 6/24/07, Chuckk Hubbard <badmuthahubbard@xxxxxxxxx> wrote:
<SNIP>
>

Chuck,
   Sorry for your problems. However there isn't enough information to
help debug the problem. We'll need hardware specifics, info on the
kernel and how it's configured, what audio card drivers are loaded &
how you are attempting to run Jack, just to start with. We'll start
with that and see where it leads.

   Please provide the output from the following commands:

uname -a
lspci
cat /proc/asound/cards
lsmod
cat /proc/interrupts


Hi Mark, thanks for your reply, and sorry I didn't respond sooner.  I've run those commands, and here is my output, and the command line and its results from qjackctl...
Thanks, I appreciate you guys taking the time to help!

-Chuckk


64studio:/mnt/win/Linux# uname -a
Linux 64studio 2.6.22-rc4.062107 #1 PREEMPT Thu Jun 21 23:28:59 EDT 2007 x86_64 GNU/Linux


64studio:/mnt/win/Linux# lspci
00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 10)
00:01.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge
00:04.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge
00:05.0 PCI bridge: ATI Technologies Inc Unknown device 5a37
00:13.0 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller (rev 80)
00:13.1 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller (rev 80)
00:13.2 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host Controller (rev 80)
00:14.0 SMBus: ATI Technologies Inc IXP SB400 SMBus Controller (rev 83)
00:14.1 IDE interface: ATI Technologies Inc Standard Dual Channel PCI IDE Controller ATI (rev 80)
00:14.2 Audio device: ATI Technologies Inc SB450 HDA Audio (rev 01)
00:14.3 ISA bridge: ATI Technologies Inc IXP SB400 PCI-ISA Bridge (rev 80)
00:14.4 PCI bridge: ATI Technologies Inc IXP SB400 PCI-PCI Bridge (rev 80)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:05.0 VGA compatible controller: ATI Technologies Inc RS482 [Radeon Xpress 200M]
02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8038 PCI-E Fast Ethernet Controller (rev 14)
05:00.0 Network controller: Broadcom Corporation Dell Wireless 1390 WLAN Mini-PCI Card (rev 01)
08:09.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
08:09.1 FireWire (IEEE 1394): Texas Instruments PCIxx12 OHCI Compliant IEEE 1394 Host Controller
08:09.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)


64studio:/mnt/win/Linux# cat /proc/asound/cards
 0 [SB             ]: HDA-Intel - HDA ATI SB
                      HDA ATI SB at 0xc0000000 irq 16


64studio:/mnt/win/Linux# lsmod
Module                  Size  Used by
nls_iso8859_1           5568  1
ntfs                  193696  1
ppdev                   9608  0
parport_pc             38376  0
lp                     12936  0
parport                40460  3 ppdev,parport_pc,lp
thermal                15376  0
fan                     5896  0
button                  9312  0
processor              26940  1 thermal
ac                      6280  0
battery                11464  0
ipv6                  273320  10
md_mod                 80796  1
dm_snapshot            17096  0
dm_mirror              22272  0
dm_mod                 60240  2 dm_snapshot,dm_mirror
snd_seq_dummy           4356  0
snd_seq_oss            32448  0
snd_seq_midi            9408  0
snd_rawmidi            27104  1 snd_seq_midi
snd_seq_midi_event      8320  2 snd_seq_oss,snd_seq_midi
snd_seq                53632  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_seq_device          8788  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
sbp2                   24968  0
scsi_mod              161816  1 sbp2
joydev                 11520  0
tsdev                   9280  0
pcmcia                 42200  0
snd_hda_intel         307808  1
snd_pcm_oss            44384  0
snd_mixer_oss          17600  1 snd_pcm_oss
pcspkr                  3456  0
psmouse                40988  0
yenta_socket           27596  1
snd_pcm                87436  2 snd_hda_intel,snd_pcm_oss
snd_timer              25096  2 snd_seq,snd_pcm
bcm43xx               427808  0
firmware_class         11264  2 pcmcia,bcm43xx
rsrc_nonstatic         12096  1 yenta_socket
pcmcia_core            42844  3 pcmcia,yenta_socket,rsrc_nonstatic
serio_raw               7684  0
ohci1394               35208  0
ieee1394               99928  2 sbp2,ohci1394
rng_core                5896  1 bcm43xx
snd                    61992  11 snd_seq_oss,snd_rawmidi,snd_seq,snd_seq_device,snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore               9312  1 snd
i2c_piix4               9612  0
snd_page_alloc         10576  2 snd_hda_intel,snd_pcm
i2c_core               27608  1 i2c_piix4
sky2                   45256  0
ieee80211softmac       35008  1 bcm43xx
ehci_hcd               34188  0
shpchp                 34076  0
ohci_hcd               22404  0
pci_hotplug            17096  1 shpchp
evdev                  11136  6


64studio:/mnt/win/Linux# cat /proc/interrupts
           CPU0      
  0:     447351   IO-APIC-edge      timer
  1:        555   IO-APIC-edge      i8042
  8:          0   IO-APIC-edge      rtc
 12:       6248   IO-APIC-edge      i8042
 14:       9543   IO-APIC-edge      ide0
 16:        429   IO-APIC-fasteoi   eth0, HDA Intel
 17:       1393   IO-APIC-fasteoi   bcm43xx
 19:          2   IO-APIC-fasteoi   ohci_hcd:usb1, ohci_hcd:usb2, ehci_hcd:usb3
 20:          1   IO-APIC-fasteoi   yenta
 21:        393   IO-APIC-fasteoi   acpi, ohci1394
NMI:          0
LOC:     447226
ERR:          0

====================
qjackctl messages:


05:00:06.080 Patchbay deactivated.
05:00:06.126 Statistics reset.
JACK tmpdir identified as [/dev/shm]
05:00:06.234 MIDI connection graph change.
05:00:06.358 MIDI connection change.
05:00:30.468 Startup script...
05:00:30.469 artsshell -q terminate
JACK tmpdir identified as [/dev/shm]
can't create mcop directory
Creating link /home/chuckk/.kde/socket-64studio.
05:00:31.211 Startup script terminated with exit status=256.
05:00:31.211 JACK is starting...
05:00:31.211 /usr/bin/jackd -dalsa -dhw:0 -r44100 -p1024 -n2


_______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user

No idea whether this is all the problem. Try and check the 'Realtime' checkbox in the qjackctl settings-window and put the 'priority' value to something like 70 - dunno why realtime is allways deactivated by default - even in audio-distros.
make sure the -R and -P options appear in the output:

/usr/bin/jackd -R -P70 -u -dalsa -dhw:0 -r44100 -p64 -n2


There is a reasonably recend howto for building low-latency kernels on debian here:

http://forums.debian.net/viewtopic.php?t=13123

it worked for me with a 2.6.21 kernel just yesterday, but i recommend audio distros - lost so much time trying to do things i don't know anything about.
Another helpful source of information is this:

http://tapas.affenbande.org/wordpress/?page_id=3

regards, d.
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